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_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f57a05f [2019-01-08 14:04:58,854 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-08 14:04:58,857 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-08 14:04:58,869 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-08 14:04:58,869 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-08 14:04:58,870 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-08 14:04:58,872 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-08 14:04:58,874 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-08 14:04:58,876 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-08 14:04:58,877 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-08 14:04:58,878 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-08 14:04:58,908 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-01-08 14:04:58,929 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-08 14:04:58,929 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-08 14:04:58,930 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-08 14:04:58,930 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-08 14:04:58,930 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-08 14:04:58,931 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-08 14:04:58,931 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-08 14:04:58,931 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-08 14:04:58,931 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-08 14:04:58,931 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-08 14:04:58,932 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-08 14:04:58,932 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-08 14:04:58,932 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-08 14:04:58,932 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-08 14:04:58,933 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-08 14:04:58,934 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-08 14:04:58,934 INFO L133 SettingsManager]: * Use SBE=true [2019-01-08 14:04:58,934 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-08 14:04:58,934 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-08 14:04:58,934 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-08 14:04:58,936 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-08 14:04:58,936 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-08 14:04:58,936 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-08 14:04:58,936 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-08 14:04:58,938 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-08 14:04:58,938 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-08 14:04:58,938 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-08 14:04:58,938 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-08 14:04:58,939 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-08 14:04:58,939 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-08 14:04:58,939 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-08 14:04:58,939 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-08 14:04:58,939 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-08 14:04:58,941 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-08 14:04:58,941 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-08 14:04:58,941 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-08 14:04:58,941 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-08 14:04:58,941 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-08 14:04:58,942 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-08 14:04:58,942 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-08 14:04:58,984 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-08 14:04:58,997 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-08 14:04:59,000 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-08 14:04:59,002 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-08 14:04:59,002 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-08 14:04:59,003 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl [2019-01-08 14:04:59,004 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl' [2019-01-08 14:04:59,039 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-08 14:04:59,041 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-08 14:04:59,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-08 14:04:59,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-08 14:04:59,042 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-08 14:04:59,062 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 08.01 02:04:59" (1/1) ... [2019-01-08 14:04:59,080 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 08.01 02:04:59" (1/1) ... [2019-01-08 14:04:59,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-08 14:04:59,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-08 14:04:59,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-08 14:04:59,121 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-08 14:04:59,133 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 08.01 02:04:59" (1/1) ... [2019-01-08 14:04:59,134 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 08.01 02:04:59" (1/1) ... [2019-01-08 14:04:59,136 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 08.01 02:04:59" (1/1) ... [2019-01-08 14:04:59,136 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 08.01 02:04:59" (1/1) ... [2019-01-08 14:04:59,142 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 08.01 02:04:59" (1/1) ... [2019-01-08 14:04:59,150 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 08.01 02:04:59" (1/1) ... [2019-01-08 14:04:59,152 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 08.01 02:04:59" (1/1) ... [2019-01-08 14:04:59,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-08 14:04:59,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-08 14:04:59,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-08 14:04:59,163 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-08 14:04:59,164 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 08.01 02:04:59" (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:8192 -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:8192 -smt2 -in -t:2000 [2019-01-08 14:04:59,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-08 14:04:59,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-08 14:04:59,720 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-08 14:04:59,721 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-01-08 14:04:59,723 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 02:04:59 BoogieIcfgContainer [2019-01-08 14:04:59,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-08 14:04:59,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-08 14:04:59,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-08 14:04:59,729 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-08 14:04:59,730 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 08.01 02:04:59" (1/2) ... [2019-01-08 14:04:59,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c4cd960 and model type speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 02:04:59, skipping insertion in model container [2019-01-08 14:04:59,731 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 08.01 02:04:59" (2/2) ... [2019-01-08 14:04:59,733 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-unlimited.bpl [2019-01-08 14:04:59,743 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-08 14:04:59,752 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-01-08 14:04:59,769 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-01-08 14:04:59,802 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-08 14:04:59,803 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-08 14:04:59,803 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-08 14:04:59,803 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-08 14:04:59,803 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-08 14:04:59,803 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-08 14:04:59,804 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-08 14:04:59,804 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-08 14:04:59,817 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-01-08 14:04:59,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-08 14:04:59,823 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:04:59,824 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-08 14:04:59,827 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:04:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:59,833 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-01-08 14:04:59,836 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:04:59,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:59,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:59,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:59,882 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:04:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:00,063 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:05:00,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-08 14:05:00,064 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:05:00,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-08 14:05:00,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-08 14:05:00,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:05:00,085 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-01-08 14:05:00,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:00,349 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-01-08 14:05:00,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:05:00,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-08 14:05:00,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:00,366 INFO L225 Difference]: With dead ends: 37 [2019-01-08 14:05:00,366 INFO L226 Difference]: Without dead ends: 32 [2019-01-08 14:05:00,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:05:00,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-08 14:05:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-01-08 14:05:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-01-08 14:05:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-01-08 14:05:00,411 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-01-08 14:05:00,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:00,412 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-01-08 14:05:00,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-08 14:05:00,413 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-01-08 14:05:00,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:05:00,413 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:00,413 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:05:00,414 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:00,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:00,415 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-01-08 14:05:00,415 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:00,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:00,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:00,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:00,417 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:00,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:00,689 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:00,690 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:05:00,693 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-01-08 14:05:00,730 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:00,730 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:00,808 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:00,810 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:05:00,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:00,816 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:00,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:00,816 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:00,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:00,835 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:00,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:01,169 WARN L181 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-08 14:05:01,192 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:05:01,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:05:01,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,269 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:05:01,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:05:01,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,355 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:05:01,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,435 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:05:01,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:05:01,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:01,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-08 14:05:01,536 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:01,922 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:02,295 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:02,370 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:02,430 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:02,486 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:02,515 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:02,539 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:02,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:05:02,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,701 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:05:02,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:02,799 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:05:02,979 WARN L181 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-08 14:05:03,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,025 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 68 treesize of output 105 [2019-01-08 14:05:03,129 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-08 14:05:03,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,149 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-08 14:05:03,314 WARN L181 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-08 14:05:03,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-08 14:05:03,544 WARN L181 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:05:03,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:03,707 INFO L303 Elim1Store]: Index analysis took 157 ms [2019-01-08 14:05:03,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-08 14:05:03,712 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:03,784 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:03,916 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:03,981 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,048 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,127 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,239 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,366 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:04,367 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:147, output treesize:153 [2019-01-08 14:05:04,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:04,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-08 14:05:04,457 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:04,665 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:04,665 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-08 14:05:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:04,695 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:04,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:04,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:05:04,911 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:04,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:05:04,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:05:04,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:05:04,912 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2019-01-08 14:05:16,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:16,212 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2019-01-08 14:05:16,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:05:16,215 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:05:16,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:16,217 INFO L225 Difference]: With dead ends: 63 [2019-01-08 14:05:16,217 INFO L226 Difference]: Without dead ends: 60 [2019-01-08 14:05:16,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:05:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-08 14:05:16,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-01-08 14:05:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-08 14:05:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2019-01-08 14:05:16,227 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2019-01-08 14:05:16,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:16,227 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2019-01-08 14:05:16,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:05:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2019-01-08 14:05:16,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:05:16,228 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:16,228 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:05:16,229 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:16,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:16,229 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2019-01-08 14:05:16,229 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:16,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:16,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:16,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:16,231 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:16,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:16,394 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:16,394 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:05:16,395 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2019-01-08 14:05:16,397 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:16,397 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:16,406 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:16,407 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:05:16,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:16,407 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:16,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:16,408 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:16,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:16,417 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:16,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:16,510 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:05:16,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:05:16,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:05:16,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:05:16,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:05:16,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:05:16,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:16,663 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:05:16,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:05:16,728 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:16,801 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:16,871 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:16,920 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:16,957 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:16,991 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,015 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,048 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:05:17,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:05:17,369 WARN L181 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2019-01-08 14:05:17,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:05:17,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,466 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:05:17,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:05:17,757 WARN L181 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-08 14:05:17,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:17,774 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:05:17,776 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,814 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,856 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,897 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,939 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:17,985 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:18,067 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:18,067 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-08 14:05:18,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:18,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-08 14:05:18,129 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:18,201 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:18,202 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-08 14:05:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:18,387 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:18,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:18,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:05:18,555 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:18,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:05:18,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:05:18,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:05:18,556 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2019-01-08 14:05:19,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:19,519 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2019-01-08 14:05:19,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:05:19,519 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:05:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:19,522 INFO L225 Difference]: With dead ends: 62 [2019-01-08 14:05:19,522 INFO L226 Difference]: Without dead ends: 60 [2019-01-08 14:05:19,522 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:05:19,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-08 14:05:19,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2019-01-08 14:05:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-08 14:05:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2019-01-08 14:05:19,529 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2019-01-08 14:05:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:19,530 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2019-01-08 14:05:19,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:05:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2019-01-08 14:05:19,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:05:19,530 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:19,531 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:05:19,531 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:19,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:19,531 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2019-01-08 14:05:19,531 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:19,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:19,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:19,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:19,533 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:19,583 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:05:19,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-08 14:05:19,583 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:05:19,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-08 14:05:19,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-08 14:05:19,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:05:19,584 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2019-01-08 14:05:19,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:19,670 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2019-01-08 14:05:19,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:05:19,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-08 14:05:19,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:19,671 INFO L225 Difference]: With dead ends: 31 [2019-01-08 14:05:19,671 INFO L226 Difference]: Without dead ends: 30 [2019-01-08 14:05:19,671 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:05:19,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-08 14:05:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-01-08 14:05:19,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-08 14:05:19,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2019-01-08 14:05:19,678 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2019-01-08 14:05:19,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:19,678 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2019-01-08 14:05:19,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-08 14:05:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2019-01-08 14:05:19,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:05:19,679 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:19,679 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:05:19,679 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:19,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:19,680 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2019-01-08 14:05:19,680 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:19,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:19,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:19,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:19,681 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:19,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:19,743 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:19,743 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:05:19,744 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2019-01-08 14:05:19,746 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:19,746 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:19,754 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:19,754 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:05:19,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:19,755 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:19,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:19,755 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:19,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:19,764 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:19,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:19,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,807 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:05:19,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:05:19,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:05:19,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:19,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:05:20,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,086 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 42 treesize of output 105 [2019-01-08 14:05:20,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:20,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:05:20,198 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,244 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,293 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,370 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,470 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,643 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,725 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:05:20,730 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:05:20,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:05:20,741 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:05:20,761 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:05:20,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:05:20,791 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:05:20,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:05:20,846 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,917 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,962 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:20,996 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:21,020 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:21,137 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:21,158 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:21,176 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:21,262 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:21,262 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:121, output treesize:125 [2019-01-08 14:05:21,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-08 14:05:21,371 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:21,470 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:21,471 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-08 14:05:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:21,498 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:21,527 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-08 14:05:21,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-08 14:05:21,528 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:05:21,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-08 14:05:21,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-08 14:05:21,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-08 14:05:21,529 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2019-01-08 14:05:21,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:21,637 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2019-01-08 14:05:21,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-08 14:05:21,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-08 14:05:21,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:21,639 INFO L225 Difference]: With dead ends: 32 [2019-01-08 14:05:21,639 INFO L226 Difference]: Without dead ends: 31 [2019-01-08 14:05:21,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-08 14:05:21,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-01-08 14:05:21,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-01-08 14:05:21,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-08 14:05:21,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2019-01-08 14:05:21,648 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2019-01-08 14:05:21,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:21,649 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2019-01-08 14:05:21,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-08 14:05:21,649 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2019-01-08 14:05:21,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:05:21,649 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:21,650 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:05:21,650 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:21,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:21,650 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2019-01-08 14:05:21,651 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:21,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:21,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:21,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:21,652 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:21,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:21,754 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:21,754 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:05:21,754 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2019-01-08 14:05:21,756 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:21,756 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:21,765 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:21,765 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:05:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:21,766 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:21,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:21,766 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:21,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:21,779 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:21,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:21,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:05:21,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:05:21,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:05:21,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:05:21,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:21,970 INFO L303 Elim1Store]: Index analysis took 107 ms [2019-01-08 14:05:21,971 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 [2019-01-08 14:05:21,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:05:22,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:05:22,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:05:22,082 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,157 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,212 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,255 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,296 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,318 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,338 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,357 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:22,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:05:22,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:05:22,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,516 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:05:22,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,582 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:05:22,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:22,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:05:23,085 WARN L181 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-08 14:05:23,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:05:23,134 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:23,175 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:23,215 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:23,258 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:23,303 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:23,346 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:23,422 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:23,422 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-08 14:05:23,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:23,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-08 14:05:23,476 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:23,556 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:23,556 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-08 14:05:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:23,575 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:23,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:23,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:05:23,605 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:23,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:05:23,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:05:23,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:05:23,606 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2019-01-08 14:05:24,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:24,537 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2019-01-08 14:05:24,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:05:24,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:05:24,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:24,538 INFO L225 Difference]: With dead ends: 65 [2019-01-08 14:05:24,538 INFO L226 Difference]: Without dead ends: 64 [2019-01-08 14:05:24,539 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:05:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-01-08 14:05:24,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2019-01-08 14:05:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-08 14:05:24,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2019-01-08 14:05:24,548 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2019-01-08 14:05:24,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:24,549 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2019-01-08 14:05:24,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:05:24,549 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2019-01-08 14:05:24,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:05:24,549 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:24,549 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:05:24,550 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:24,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:24,550 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2019-01-08 14:05:24,550 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:24,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:24,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:24,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:24,551 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:24,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:24,644 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:24,644 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:05:24,645 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2019-01-08 14:05:24,645 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:24,646 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:24,653 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:24,654 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:05:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:24,654 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:24,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:24,654 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:24,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:24,665 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:24,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:24,710 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:05:24,714 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:05:24,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:05:24,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:05:24,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:24,983 INFO L303 Elim1Store]: Index analysis took 109 ms [2019-01-08 14:05:24,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:05:25,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,118 INFO L303 Elim1Store]: Index analysis took 132 ms [2019-01-08 14:05:25,119 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:05:25,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,259 INFO L303 Elim1Store]: Index analysis took 138 ms [2019-01-08 14:05:25,261 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:05:25,304 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:05:25,305 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,362 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,408 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,441 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,470 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,499 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,519 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,537 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:05:25,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,635 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:05:25,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,688 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:05:25,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,752 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:05:25,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,836 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:05:25,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:25,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:05:25,937 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:25,975 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:26,016 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:26,055 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:26,096 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:26,136 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:26,206 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:26,207 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-08 14:05:26,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:26,249 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-08 14:05:26,250 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:26,320 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:26,321 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-08 14:05:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:26,344 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:26,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:26,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:05:26,376 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:26,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:05:26,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:05:26,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:05:26,377 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2019-01-08 14:05:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:27,122 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2019-01-08 14:05:27,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:05:27,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:05:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:27,124 INFO L225 Difference]: With dead ends: 67 [2019-01-08 14:05:27,124 INFO L226 Difference]: Without dead ends: 65 [2019-01-08 14:05:27,124 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:05:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-01-08 14:05:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2019-01-08 14:05:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-01-08 14:05:27,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 132 transitions. [2019-01-08 14:05:27,133 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 132 transitions. Word has length 3 [2019-01-08 14:05:27,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:27,133 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 132 transitions. [2019-01-08 14:05:27,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:05:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 132 transitions. [2019-01-08 14:05:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:05:27,134 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:27,134 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:05:27,135 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:27,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:27,135 INFO L82 PathProgramCache]: Analyzing trace with hash 954866, now seen corresponding path program 1 times [2019-01-08 14:05:27,135 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:27,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:27,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:27,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:27,136 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:27,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:27,234 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:27,234 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:05:27,235 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [35] [2019-01-08 14:05:27,235 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:27,236 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:27,243 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:27,243 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:05:27,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:27,244 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:27,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:27,244 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:27,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:27,254 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:27,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:27,300 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:05:27,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:05:27,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,322 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:05:27,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:05:27,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,365 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:05:27,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,384 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:05:27,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:05:27,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,435 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-08 14:05:27,436 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,645 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,749 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,786 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,817 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,845 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,867 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,888 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:27,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:27,945 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:05:28,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:05:28,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:05:28,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:05:28,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,335 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-08 14:05:28,444 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-08 14:05:28,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-08 14:05:28,606 WARN L181 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:05:28,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:28,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-08 14:05:28,634 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:28,701 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:28,766 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:28,833 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:28,905 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:28,965 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,026 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,120 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:29,121 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-08 14:05:29,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-08 14:05:29,172 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,277 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:29,278 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-08 14:05:29,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:29,406 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:05:29,407 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 53 treesize of output 166 [2019-01-08 14:05:29,408 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:29,537 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:29,538 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-08 14:05:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:29,667 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:29,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:29,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:05:29,739 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:29,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:05:29,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:05:29,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:05:29,740 INFO L87 Difference]: Start difference. First operand 34 states and 132 transitions. Second operand 8 states. [2019-01-08 14:05:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:34,061 INFO L93 Difference]: Finished difference Result 82 states and 191 transitions. [2019-01-08 14:05:34,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:05:34,061 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:05:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:34,063 INFO L225 Difference]: With dead ends: 82 [2019-01-08 14:05:34,063 INFO L226 Difference]: Without dead ends: 80 [2019-01-08 14:05:34,064 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:05:34,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-08 14:05:34,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2019-01-08 14:05:34,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-01-08 14:05:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 128 transitions. [2019-01-08 14:05:34,074 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 128 transitions. Word has length 4 [2019-01-08 14:05:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:34,074 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 128 transitions. [2019-01-08 14:05:34,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:05:34,074 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 128 transitions. [2019-01-08 14:05:34,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:05:34,075 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:34,075 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:05:34,075 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:34,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:34,076 INFO L82 PathProgramCache]: Analyzing trace with hash 955426, now seen corresponding path program 1 times [2019-01-08 14:05:34,076 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:34,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:34,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:34,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:34,077 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:34,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:34,159 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:34,159 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:05:34,160 INFO L207 CegarAbsIntRunner]: [0], [32], [36], [37] [2019-01-08 14:05:34,161 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:34,161 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:34,170 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:34,170 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:05:34,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:34,171 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:34,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:34,171 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:34,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:34,181 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:34,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:34,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-08 14:05:34,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-08 14:05:34,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,319 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-08 14:05:34,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-08 14:05:34,547 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2019-01-08 14:05:34,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-08 14:05:34,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:34,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-08 14:05:34,736 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,791 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,850 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,907 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:34,965 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:35,024 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:35,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:05:35,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-08 14:05:35,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-08 14:05:35,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-08 14:05:35,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-08 14:05:35,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-08 14:05:35,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-08 14:05:35,340 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-08 14:05:35,342 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:35,393 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:35,432 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:35,462 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:35,486 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:35,504 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:35,520 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:35,537 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:35,603 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:35,604 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-08 14:05:36,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 149 [2019-01-08 14:05:36,338 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-08 14:05:36,393 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-08 14:05:38,318 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 54 dim-0 vars, and 9 xjuncts. [2019-01-08 14:05:38,318 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:131, output treesize:885 [2019-01-08 14:05:53,736 WARN L181 SmtUtils]: Spent 11.12 s on a formula simplification. DAG size of input: 485 DAG size of output: 103 [2019-01-08 14:05:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:53,745 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:53,774 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-08 14:05:53,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-08 14:05:53,774 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:05:53,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-08 14:05:53,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-08 14:05:53,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-08 14:05:53,775 INFO L87 Difference]: Start difference. First operand 36 states and 128 transitions. Second operand 4 states. [2019-01-08 14:05:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:53,834 INFO L93 Difference]: Finished difference Result 40 states and 140 transitions. [2019-01-08 14:05:53,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:05:53,835 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-08 14:05:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:53,836 INFO L225 Difference]: With dead ends: 40 [2019-01-08 14:05:53,836 INFO L226 Difference]: Without dead ends: 39 [2019-01-08 14:05:53,837 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-08 14:05:53,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-01-08 14:05:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-01-08 14:05:53,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-08 14:05:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 138 transitions. [2019-01-08 14:05:53,847 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 138 transitions. Word has length 4 [2019-01-08 14:05:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:53,847 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 138 transitions. [2019-01-08 14:05:53,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-08 14:05:53,848 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 138 transitions. [2019-01-08 14:05:53,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:05:53,848 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:53,850 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:05:53,850 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:53,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:53,850 INFO L82 PathProgramCache]: Analyzing trace with hash 954990, now seen corresponding path program 1 times [2019-01-08 14:05:53,851 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:53,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:53,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:53,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:53,852 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:54,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:54,229 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:54,229 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:05:54,229 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [35] [2019-01-08 14:05:54,233 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:54,234 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:54,243 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:54,243 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:05:54,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:54,247 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:54,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:54,247 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:05:54,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:54,264 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:54,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:54,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,363 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:05:54,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,447 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:05:54,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,512 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:05:54,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:05:54,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,710 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-08 14:05:54,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-08 14:05:54,951 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:05:54,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:54,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-08 14:05:54,974 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,034 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,103 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,171 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,245 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,315 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,386 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:05:55,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:05:55,476 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:05:55,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:05:55,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:05:55,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:05:55,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:05:55,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-08 14:05:55,539 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,648 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,689 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,721 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,745 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,765 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,782 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,798 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:55,890 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:55,891 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-08 14:05:55,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:55,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-08 14:05:55,926 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:56,016 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:56,017 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-08 14:05:56,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:56,057 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-08 14:05:56,058 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:56,176 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:05:56,176 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-08 14:05:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:56,273 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:56,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:56,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:05:56,315 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:56,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:05:56,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:05:56,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:05:56,316 INFO L87 Difference]: Start difference. First operand 38 states and 138 transitions. Second operand 8 states. [2019-01-08 14:06:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:00,079 INFO L93 Difference]: Finished difference Result 84 states and 220 transitions. [2019-01-08 14:06:00,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:06:00,080 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:06:00,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:00,081 INFO L225 Difference]: With dead ends: 84 [2019-01-08 14:06:00,081 INFO L226 Difference]: Without dead ends: 82 [2019-01-08 14:06:00,082 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 [2019-01-08 14:06:00,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-01-08 14:06:00,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2019-01-08 14:06:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-08 14:06:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-08 14:06:00,094 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-08 14:06:00,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:00,094 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-08 14:06:00,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:00,094 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-08 14:06:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:00,095 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:00,095 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:00,095 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:00,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:00,096 INFO L82 PathProgramCache]: Analyzing trace with hash 954618, now seen corresponding path program 1 times [2019-01-08 14:06:00,096 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:00,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:00,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:00,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:00,097 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:00,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:00,211 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:00,211 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:00,212 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [35] [2019-01-08 14:06:00,212 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:00,213 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:00,217 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:00,217 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:00,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:00,217 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:00,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:00,218 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:00,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:00,226 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:00,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:00,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:06:00,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:06:00,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,399 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:06:00,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:06:00,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-08 14:06:00,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,669 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-08 14:06:00,913 WARN L181 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:06:00,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-08 14:06:00,931 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:01,024 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:01,081 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:01,137 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:01,198 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:01,259 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:01,321 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:01,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:01,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:06:01,414 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:06:01,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:06:01,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:06:01,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:06:01,437 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:06:01,442 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-08 14:06:01,443 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:01,665 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:01,751 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:01,783 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:01,808 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:01,829 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:01,845 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:01,861 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:01,951 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:01,951 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-08 14:06:02,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:02,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-08 14:06:02,043 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:02,135 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:02,135 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-08 14:06:02,372 WARN L181 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2019-01-08 14:06:02,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:02,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:02,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:02,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:02,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:02,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:02,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:02,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:02,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:02,491 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:02,491 INFO L303 Elim1Store]: Index analysis took 113 ms [2019-01-08 14:06:02,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-08 14:06:02,493 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:02,587 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:02,588 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-08 14:06:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:02,612 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:02,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:02,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:06:02,654 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:02,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:02,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:02,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:02,655 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-08 14:06:06,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:06,331 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-08 14:06:06,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:06:06,331 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:06:06,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:06,332 INFO L225 Difference]: With dead ends: 81 [2019-01-08 14:06:06,333 INFO L226 Difference]: Without dead ends: 80 [2019-01-08 14:06:06,333 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:06:06,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-08 14:06:06,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2019-01-08 14:06:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-08 14:06:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-08 14:06:06,344 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-08 14:06:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:06,344 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-08 14:06:06,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-08 14:06:06,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:06,345 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:06,345 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:06,345 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:06,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:06,346 INFO L82 PathProgramCache]: Analyzing trace with hash 955114, now seen corresponding path program 1 times [2019-01-08 14:06:06,346 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:06,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:06,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:06,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:06,347 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:06,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:06,458 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:06,458 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:06,458 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [35] [2019-01-08 14:06:06,459 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:06,459 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:06,464 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:06,464 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:06,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:06,465 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:06,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:06,465 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:06,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:06,478 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:06,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:06,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:06:06,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:06:06,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:06:06,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,758 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:06:06,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,857 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-08 14:06:06,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:06,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-08 14:06:07,321 WARN L181 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:06:07,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:07,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:07,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:07,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:07,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:07,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:07,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:07,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:07,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:07,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:07,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:07,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:07,346 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-08 14:06:07,347 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:07,449 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:07,518 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:07,585 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:07,657 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:07,728 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:07,800 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:07,884 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:07,887 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:06:07,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:06:07,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:06:07,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:06:07,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:06:07,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:06:07,915 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-08 14:06:07,916 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:07,987 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:08,028 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:08,059 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:08,083 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:08,103 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:08,120 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:08,136 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:08,228 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:08,228 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-08 14:06:08,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:08,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-08 14:06:08,268 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:08,370 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:08,370 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-08 14:06:08,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:08,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:08,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:08,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:08,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:08,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:08,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:08,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:08,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:08,422 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:08,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-08 14:06:08,424 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:08,517 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:08,518 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-08 14:06:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:08,673 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:08,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:08,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:06:08,716 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:08,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:08,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:08,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:08,717 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-08 14:06:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:10,308 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-08 14:06:10,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:06:10,313 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:06:10,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:10,314 INFO L225 Difference]: With dead ends: 81 [2019-01-08 14:06:10,314 INFO L226 Difference]: Without dead ends: 79 [2019-01-08 14:06:10,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:06:10,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-01-08 14:06:10,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2019-01-08 14:06:10,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-01-08 14:06:10,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 175 transitions. [2019-01-08 14:06:10,327 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 175 transitions. Word has length 4 [2019-01-08 14:06:10,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:10,327 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 175 transitions. [2019-01-08 14:06:10,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:10,327 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 175 transitions. [2019-01-08 14:06:10,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:10,328 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:10,328 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:10,329 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:10,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:10,329 INFO L82 PathProgramCache]: Analyzing trace with hash 954742, now seen corresponding path program 1 times [2019-01-08 14:06:10,329 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:10,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:10,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:10,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:10,330 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:10,822 WARN L181 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2019-01-08 14:06:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:10,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:10,888 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:10,888 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:10,888 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [35] [2019-01-08 14:06:10,891 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:10,891 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:10,895 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:10,895 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:10,896 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:10,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:10,896 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:10,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:10,907 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:10,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:10,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:10,972 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:06:10,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,977 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:06:10,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:06:10,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:06:10,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:10,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,005 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:06:11,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:06:11,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:11,205 INFO L303 Elim1Store]: Index analysis took 184 ms [2019-01-08 14:06:11,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-08 14:06:11,207 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,072 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,585 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,621 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,651 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,675 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,696 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,715 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:12,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,768 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:06:12,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,820 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:06:12,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:06:12,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:12,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:06:13,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,044 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-08 14:06:13,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-08 14:06:13,287 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:06:13,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,305 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-08 14:06:13,305 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,360 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,415 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,471 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,528 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,584 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,642 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,733 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:13,734 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-08 14:06:13,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:13,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-08 14:06:13,770 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:13,860 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:13,861 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-08 14:06:13,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:14,086 INFO L303 Elim1Store]: Index analysis took 138 ms [2019-01-08 14:06:14,087 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-08 14:06:14,087 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:14,182 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:14,182 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-08 14:06:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:14,264 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:14,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:14,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:06:14,311 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:14,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:14,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:14,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:06:14,312 INFO L87 Difference]: Start difference. First operand 44 states and 175 transitions. Second operand 8 states. [2019-01-08 14:06:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:17,723 INFO L93 Difference]: Finished difference Result 99 states and 274 transitions. [2019-01-08 14:06:17,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:06:17,724 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:06:17,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:17,725 INFO L225 Difference]: With dead ends: 99 [2019-01-08 14:06:17,725 INFO L226 Difference]: Without dead ends: 95 [2019-01-08 14:06:17,726 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:06:17,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-01-08 14:06:17,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2019-01-08 14:06:17,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-01-08 14:06:17,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 210 transitions. [2019-01-08 14:06:17,736 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 210 transitions. Word has length 4 [2019-01-08 14:06:17,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:17,737 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 210 transitions. [2019-01-08 14:06:17,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:17,737 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 210 transitions. [2019-01-08 14:06:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:17,737 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:17,738 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:17,738 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:17,738 INFO L82 PathProgramCache]: Analyzing trace with hash 941536, now seen corresponding path program 1 times [2019-01-08 14:06:17,738 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:17,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:17,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:17,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:17,739 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:17,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:17,870 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:17,870 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:17,870 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [35] [2019-01-08 14:06:17,871 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:17,871 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:17,875 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:17,876 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:17,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:17,876 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:17,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:17,876 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:17,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:17,888 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:17,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:17,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:17,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:06:17,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,954 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:06:17,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:06:17,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:17,991 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:06:18,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,059 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:06:18,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,071 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:06:18,089 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:06:18,090 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,148 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,193 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,231 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,261 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,288 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,308 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,328 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:06:18,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,435 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:06:18,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,505 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:06:18,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:06:18,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:06:18,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:18,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:06:18,779 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,822 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,866 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,912 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:18,962 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:19,002 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:19,069 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:19,070 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-08 14:06:19,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,115 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-08 14:06:19,116 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:19,176 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:19,177 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:06:19,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:19,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 134 [2019-01-08 14:06:19,214 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:19,279 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:19,280 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-08 14:06:19,499 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2019-01-08 14:06:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:19,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:19,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:19,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:06:19,942 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:19,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:19,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:19,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:19,943 INFO L87 Difference]: Start difference. First operand 52 states and 210 transitions. Second operand 8 states. [2019-01-08 14:06:20,474 WARN L181 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-01-08 14:06:21,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:21,585 INFO L93 Difference]: Finished difference Result 101 states and 289 transitions. [2019-01-08 14:06:21,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:06:21,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:06:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:21,587 INFO L225 Difference]: With dead ends: 101 [2019-01-08 14:06:21,587 INFO L226 Difference]: Without dead ends: 99 [2019-01-08 14:06:21,587 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:06:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-08 14:06:21,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2019-01-08 14:06:21,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-08 14:06:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 243 transitions. [2019-01-08 14:06:21,601 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 243 transitions. Word has length 4 [2019-01-08 14:06:21,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:21,602 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 243 transitions. [2019-01-08 14:06:21,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:21,602 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 243 transitions. [2019-01-08 14:06:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:21,603 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:21,603 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:21,603 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:21,603 INFO L82 PathProgramCache]: Analyzing trace with hash 941164, now seen corresponding path program 1 times [2019-01-08 14:06:21,603 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:21,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:21,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:21,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:21,604 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:21,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:21,712 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:21,712 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:21,713 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [35] [2019-01-08 14:06:21,714 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:21,714 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:21,718 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:21,718 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:21,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:21,718 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:21,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:21,719 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:21,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:21,728 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:21,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:21,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,768 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:06:21,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:06:21,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,865 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:06:21,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:06:21,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:21,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,007 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:06:22,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,115 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:06:22,115 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,154 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,194 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,234 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,275 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,316 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,366 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:22,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:06:22,375 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 [2019-01-08 14:06:22,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:06:22,382 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:06:22,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:06:22,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:06:22,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:06:22,480 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,554 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,594 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,625 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,650 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,670 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,687 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,702 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,769 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:22,769 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-08 14:06:22,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,820 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-08 14:06:22,820 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,884 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. [2019-01-08 14:06:22,884 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:06:22,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:22,918 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:22,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-08 14:06:22,920 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:22,985 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:22,985 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-08 14:06:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:23,013 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:23,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:23,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:06:23,055 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:23,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:23,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:23,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:23,056 INFO L87 Difference]: Start difference. First operand 59 states and 243 transitions. Second operand 8 states. [2019-01-08 14:06:23,605 WARN L181 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2019-01-08 14:06:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:24,260 INFO L93 Difference]: Finished difference Result 99 states and 302 transitions. [2019-01-08 14:06:24,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:06:24,261 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:06:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:24,262 INFO L225 Difference]: With dead ends: 99 [2019-01-08 14:06:24,262 INFO L226 Difference]: Without dead ends: 98 [2019-01-08 14:06:24,263 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:06:24,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-08 14:06:24,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2019-01-08 14:06:24,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-01-08 14:06:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 261 transitions. [2019-01-08 14:06:24,277 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 261 transitions. Word has length 4 [2019-01-08 14:06:24,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:24,277 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 261 transitions. [2019-01-08 14:06:24,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:24,277 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 261 transitions. [2019-01-08 14:06:24,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:24,278 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:24,278 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:24,278 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:24,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:24,278 INFO L82 PathProgramCache]: Analyzing trace with hash 941660, now seen corresponding path program 1 times [2019-01-08 14:06:24,279 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:24,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:24,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:24,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:24,280 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:24,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:24,364 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:24,365 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:24,365 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [35] [2019-01-08 14:06:24,367 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:24,367 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:24,371 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:24,371 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:24,372 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:24,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:24,372 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:24,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:24,384 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:24,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:24,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:24,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:06:24,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:06:24,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,437 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:06:24,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:06:24,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:06:24,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:06:24,489 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:06:24,490 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:24,548 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:24,593 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:24,628 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:24,654 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:24,677 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:24,697 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:24,739 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:24,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,782 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:06:24,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,829 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:06:24,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,880 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:06:24,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:24,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:06:25,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:06:25,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:06:25,144 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,185 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,223 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,262 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,301 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,340 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,408 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:25,409 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-08 14:06:25,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-08 14:06:25,461 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,522 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:25,523 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:06:25,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:25,560 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:25,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-08 14:06:25,562 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:25,630 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:25,631 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-08 14:06:25,839 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-01-08 14:06:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:25,840 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:26,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:26,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:06:26,295 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:26,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:26,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:26,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:26,296 INFO L87 Difference]: Start difference. First operand 61 states and 261 transitions. Second operand 8 states. [2019-01-08 14:06:26,841 WARN L181 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-01-08 14:06:27,930 WARN L181 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-01-08 14:06:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:28,708 INFO L93 Difference]: Finished difference Result 101 states and 320 transitions. [2019-01-08 14:06:28,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:06:28,708 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:06:28,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:28,710 INFO L225 Difference]: With dead ends: 101 [2019-01-08 14:06:28,710 INFO L226 Difference]: Without dead ends: 99 [2019-01-08 14:06:28,710 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:06:28,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-08 14:06:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2019-01-08 14:06:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-01-08 14:06:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 278 transitions. [2019-01-08 14:06:28,726 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 278 transitions. Word has length 4 [2019-01-08 14:06:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:28,726 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 278 transitions. [2019-01-08 14:06:28,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:28,726 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 278 transitions. [2019-01-08 14:06:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:28,727 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:28,727 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:28,727 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:28,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:28,727 INFO L82 PathProgramCache]: Analyzing trace with hash 941288, now seen corresponding path program 1 times [2019-01-08 14:06:28,728 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:28,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:28,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:28,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:28,729 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:28,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:28,828 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:28,828 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:28,828 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [35] [2019-01-08 14:06:28,829 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:28,829 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:28,833 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:28,834 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:28,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:28,834 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:28,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:28,834 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:28,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:28,846 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:28,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:28,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:28,937 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:06:28,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:28,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:28,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:06:29,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:06:29,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:06:29,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:06:29,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:06:29,352 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,391 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,429 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,470 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,511 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,552 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:29,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:06:29,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:06:29,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:06:29,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:06:29,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:06:29,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:06:29,649 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:06:29,650 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,701 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,742 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,772 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,795 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,815 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,832 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,847 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:29,931 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:29,931 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-08 14:06:29,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:29,980 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-08 14:06:29,980 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:30,041 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:30,042 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:06:30,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:30,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-08 14:06:30,111 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:30,179 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:30,179 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-08 14:06:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:30,201 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:30,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:30,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:06:30,245 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:30,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:30,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:30,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:30,245 INFO L87 Difference]: Start difference. First operand 62 states and 278 transitions. Second operand 8 states. [2019-01-08 14:06:30,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:30,908 INFO L93 Difference]: Finished difference Result 106 states and 350 transitions. [2019-01-08 14:06:30,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:06:30,909 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:06:30,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:30,911 INFO L225 Difference]: With dead ends: 106 [2019-01-08 14:06:30,911 INFO L226 Difference]: Without dead ends: 104 [2019-01-08 14:06:30,911 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 [2019-01-08 14:06:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-01-08 14:06:30,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2019-01-08 14:06:30,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-01-08 14:06:30,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 304 transitions. [2019-01-08 14:06:30,926 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 304 transitions. Word has length 4 [2019-01-08 14:06:30,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:30,926 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 304 transitions. [2019-01-08 14:06:30,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:30,926 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 304 transitions. [2019-01-08 14:06:30,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:30,927 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:30,927 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:30,927 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:30,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:30,928 INFO L82 PathProgramCache]: Analyzing trace with hash 941784, now seen corresponding path program 1 times [2019-01-08 14:06:30,928 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:30,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:30,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:30,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:30,929 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:31,222 WARN L181 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-08 14:06:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:31,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:31,428 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:31,429 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:31,429 INFO L207 CegarAbsIntRunner]: [0], [18], [30], [35] [2019-01-08 14:06:31,430 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:31,430 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:31,438 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:31,438 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:31,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:31,438 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:31,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:31,439 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:31,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:31,457 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:31,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:31,704 WARN L181 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-08 14:06:31,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:31,732 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:06:31,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,761 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:06:31,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:06:31,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:06:31,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,788 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:06:31,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:31,799 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:06:31,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:06:31,812 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:31,869 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:31,914 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:31,949 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:31,977 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,001 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,019 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,036 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:06:32,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:06:32,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:06:32,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,242 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:06:32,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:06:32,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,424 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:06:32,425 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,463 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,501 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,539 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,576 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,616 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,684 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:32,684 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-08 14:06:32,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-08 14:06:32,766 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:32,827 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:32,827 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:06:32,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:32,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:33,095 INFO L303 Elim1Store]: Index analysis took 244 ms [2019-01-08 14:06:33,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-08 14:06:33,097 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:33,881 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:33,881 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-08 14:06:34,105 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2019-01-08 14:06:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:34,106 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:34,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:34,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:06:34,231 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:34,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:34,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:34,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:34,231 INFO L87 Difference]: Start difference. First operand 65 states and 304 transitions. Second operand 8 states. [2019-01-08 14:06:34,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:34,912 INFO L93 Difference]: Finished difference Result 107 states and 376 transitions. [2019-01-08 14:06:34,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:06:34,913 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:06:34,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:34,915 INFO L225 Difference]: With dead ends: 107 [2019-01-08 14:06:34,915 INFO L226 Difference]: Without dead ends: 99 [2019-01-08 14:06:34,915 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:06:34,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-08 14:06:34,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-01-08 14:06:34,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-01-08 14:06:34,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 328 transitions. [2019-01-08 14:06:34,929 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 328 transitions. Word has length 4 [2019-01-08 14:06:34,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:34,930 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 328 transitions. [2019-01-08 14:06:34,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:34,930 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 328 transitions. [2019-01-08 14:06:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:34,930 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:34,931 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:34,931 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:34,931 INFO L82 PathProgramCache]: Analyzing trace with hash 930314, now seen corresponding path program 1 times [2019-01-08 14:06:34,931 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:34,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:34,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:34,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:34,932 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:35,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:35,060 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:35,060 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:35,060 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [35] [2019-01-08 14:06:35,061 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:35,062 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:35,066 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:35,066 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:35,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:35,067 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:35,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:35,067 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:35,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:35,076 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:35,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:35,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,116 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 [2019-01-08 14:06:35,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:06:35,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:06:35,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,279 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:06:35,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:06:35,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:35,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:06:35,464 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:35,512 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:35,551 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:35,595 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:35,636 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:35,678 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:35,730 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:35,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:06:35,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:06:35,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:06:35,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:06:35,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:06:35,813 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:06:35,978 INFO L303 Elim1Store]: Index analysis took 162 ms [2019-01-08 14:06:35,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:06:35,979 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:36,283 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:36,323 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:36,355 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:36,377 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:36,395 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:36,413 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:36,428 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:36,496 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:36,497 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-08 14:06:36,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 135 [2019-01-08 14:06:36,542 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:06:36,761 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 12 dim-0 vars, and 2 xjuncts. [2019-01-08 14:06:36,762 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:201 [2019-01-08 14:06:36,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:36,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 12 case distinctions, treesize of input 111 treesize of output 165 [2019-01-08 14:06:36,940 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-01-08 14:06:36,956 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2019-01-08 14:06:37,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:37,986 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:37,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 126 [2019-01-08 14:06:37,988 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:38,430 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 2 dim-1 vars, End of recursive call: 49 dim-0 vars, and 8 xjuncts. [2019-01-08 14:06:38,430 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:218, output treesize:686 [2019-01-08 14:06:39,348 WARN L181 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 114 [2019-01-08 14:06:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:39,350 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:39,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:39,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-01-08 14:06:39,385 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:39,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:39,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:39,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:06:39,386 INFO L87 Difference]: Start difference. First operand 66 states and 328 transitions. Second operand 8 states. [2019-01-08 14:06:43,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:43,520 INFO L93 Difference]: Finished difference Result 155 states and 556 transitions. [2019-01-08 14:06:43,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:06:43,521 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:06:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:43,522 INFO L225 Difference]: With dead ends: 155 [2019-01-08 14:06:43,522 INFO L226 Difference]: Without dead ends: 152 [2019-01-08 14:06:43,523 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:06:43,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-01-08 14:06:43,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2019-01-08 14:06:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-01-08 14:06:43,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 438 transitions. [2019-01-08 14:06:43,540 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 438 transitions. Word has length 4 [2019-01-08 14:06:43,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:43,540 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 438 transitions. [2019-01-08 14:06:43,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:43,540 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 438 transitions. [2019-01-08 14:06:43,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:43,541 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:43,541 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:43,542 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:43,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:43,542 INFO L82 PathProgramCache]: Analyzing trace with hash 930440, now seen corresponding path program 1 times [2019-01-08 14:06:43,542 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:43,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:43,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:43,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:43,543 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:43,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:43,732 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:43,732 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:43,732 INFO L207 CegarAbsIntRunner]: [0], [6], [36], [37] [2019-01-08 14:06:43,733 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:43,733 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:43,739 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:43,739 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:06:43,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:43,739 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:43,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:43,740 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:43,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:43,749 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:43,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:43,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:43,788 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:06:43,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:06:43,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,799 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:06:43,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,808 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:06:43,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,823 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:06:43,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:43,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:06:43,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:06:43,868 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:43,930 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:43,977 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,012 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,039 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,062 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,081 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,098 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,144 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:06:44,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,189 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:06:44,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,241 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:06:44,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:06:44,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:06:44,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:06:44,482 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,519 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,555 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,593 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,632 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,671 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,739 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. [2019-01-08 14:06:44,739 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-08 14:06:44,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:44,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-08 14:06:44,797 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:44,859 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:44,859 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-08 14:06:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:44,878 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:44,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:44,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:06:44,908 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:44,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:06:44,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:06:44,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:06:44,909 INFO L87 Difference]: Start difference. First operand 78 states and 438 transitions. Second operand 6 states. [2019-01-08 14:06:45,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:45,226 INFO L93 Difference]: Finished difference Result 104 states and 471 transitions. [2019-01-08 14:06:45,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:06:45,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-08 14:06:45,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:45,228 INFO L225 Difference]: With dead ends: 104 [2019-01-08 14:06:45,228 INFO L226 Difference]: Without dead ends: 103 [2019-01-08 14:06:45,228 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:06:45,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-01-08 14:06:45,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2019-01-08 14:06:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-08 14:06:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-08 14:06:45,246 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-08 14:06:45,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:45,246 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-08 14:06:45,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:06:45,246 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-08 14:06:45,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:45,247 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:45,247 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:45,247 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:45,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:45,247 INFO L82 PathProgramCache]: Analyzing trace with hash 945816, now seen corresponding path program 1 times [2019-01-08 14:06:45,247 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:45,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:45,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:45,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:45,248 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:45,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:45,283 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:45,284 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:45,284 INFO L207 CegarAbsIntRunner]: [0], [22], [36], [37] [2019-01-08 14:06:45,286 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:45,286 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:45,289 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:45,289 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:06:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:45,290 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:45,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:45,290 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:45,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:45,306 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:45,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:45,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:45,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-08 14:06:45,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,330 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-08 14:06:45,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,340 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-08 14:06:45,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-08 14:06:45,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-08 14:06:45,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,382 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-08 14:06:45,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-08 14:06:45,395 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:45,447 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:45,490 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:45,523 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:45,549 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:45,571 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:45,587 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:45,604 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:45,641 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-08 14:06:45,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,665 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-08 14:06:45,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,710 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 [2019-01-08 14:06:45,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-08 14:06:45,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,843 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-08 14:06:45,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:45,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-08 14:06:45,935 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:45,969 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:46,005 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:46,039 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:46,075 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:46,114 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:46,179 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:46,180 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-08 14:06:46,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:46,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-08 14:06:46,213 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:46,273 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:46,273 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-08 14:06:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:46,293 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:46,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:46,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:06:46,323 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:46,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:06:46,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:06:46,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:06:46,324 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 6 states. [2019-01-08 14:06:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:46,681 INFO L93 Difference]: Finished difference Result 108 states and 483 transitions. [2019-01-08 14:06:46,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:06:46,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-08 14:06:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:46,683 INFO L225 Difference]: With dead ends: 108 [2019-01-08 14:06:46,683 INFO L226 Difference]: Without dead ends: 107 [2019-01-08 14:06:46,683 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:06:46,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-01-08 14:06:46,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2019-01-08 14:06:46,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-08 14:06:46,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-08 14:06:46,702 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-08 14:06:46,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:46,702 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-08 14:06:46,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:06:46,702 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-08 14:06:46,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:46,703 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:46,703 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:46,703 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:46,703 INFO L82 PathProgramCache]: Analyzing trace with hash 945008, now seen corresponding path program 1 times [2019-01-08 14:06:46,703 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:46,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:46,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:46,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:46,704 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:46,914 WARN L181 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2019-01-08 14:06:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:46,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:46,943 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:46,943 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:46,944 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [35] [2019-01-08 14:06:46,945 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:46,945 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:46,948 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:46,948 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:46,948 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:46,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:46,949 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:46,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:46,960 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:46,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:47,207 WARN L181 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-08 14:06:47,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:06:47,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:06:47,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:06:47,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:06:47,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,530 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 [2019-01-08 14:06:47,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:47,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:06:47,629 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:47,668 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:47,708 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:47,748 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:47,789 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:47,831 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:47,880 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:47,884 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:06:47,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:06:47,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:06:47,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:06:47,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:06:47,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:06:47,913 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:06:47,914 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:47,965 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:48,006 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:48,037 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:48,062 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:48,082 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:48,107 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:48,121 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:48,189 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:48,190 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-08 14:06:48,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:48,238 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-08 14:06:48,239 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:48,303 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:48,303 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:06:48,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:48,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:48,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:48,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:48,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:48,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:48,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:48,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:48,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:48,581 INFO L303 Elim1Store]: Index analysis took 247 ms [2019-01-08 14:06:48,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-08 14:06:48,582 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:48,738 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:48,739 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-08 14:06:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:48,760 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:48,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:48,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:06:48,807 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:48,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:48,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:48,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:06:48,808 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 8 states. [2019-01-08 14:06:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:50,458 INFO L93 Difference]: Finished difference Result 154 states and 652 transitions. [2019-01-08 14:06:50,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:06:50,461 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:06:50,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:50,463 INFO L225 Difference]: With dead ends: 154 [2019-01-08 14:06:50,463 INFO L226 Difference]: Without dead ends: 153 [2019-01-08 14:06:50,464 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:06:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-01-08 14:06:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2019-01-08 14:06:50,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-01-08 14:06:50,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 556 transitions. [2019-01-08 14:06:50,487 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 556 transitions. Word has length 4 [2019-01-08 14:06:50,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:50,487 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 556 transitions. [2019-01-08 14:06:50,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 556 transitions. [2019-01-08 14:06:50,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:50,488 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:50,488 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:50,488 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:50,489 INFO L82 PathProgramCache]: Analyzing trace with hash 945504, now seen corresponding path program 1 times [2019-01-08 14:06:50,489 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:50,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:50,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:50,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:50,490 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:50,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:50,627 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:50,627 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:50,627 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [35] [2019-01-08 14:06:50,630 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:50,630 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:50,632 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:50,633 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:50,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:50,633 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:50,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:50,634 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:50,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:50,642 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:50,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:50,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:50,685 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:06:50,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:06:50,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,698 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:06:50,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:06:50,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,719 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:06:50,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:50,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:06:50,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:06:50,752 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,827 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,872 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,906 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,933 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,956 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,974 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:50,992 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:51,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:06:51,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,082 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:06:51,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:06:51,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:06:51,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:06:51,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,438 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:06:51,439 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:51,477 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:51,514 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:51,552 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:51,591 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:51,630 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:51,698 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:51,698 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-08 14:06:51,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-08 14:06:51,746 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:51,810 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:51,810 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:06:51,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:51,843 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-08 14:06:51,844 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:51,911 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:51,911 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-08 14:06:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:51,937 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:51,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:51,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:06:51,988 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:51,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:51,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:51,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:06:51,989 INFO L87 Difference]: Start difference. First operand 92 states and 556 transitions. Second operand 8 states. [2019-01-08 14:06:52,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:52,655 INFO L93 Difference]: Finished difference Result 148 states and 688 transitions. [2019-01-08 14:06:52,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:06:52,656 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:06:52,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:52,658 INFO L225 Difference]: With dead ends: 148 [2019-01-08 14:06:52,658 INFO L226 Difference]: Without dead ends: 146 [2019-01-08 14:06:52,659 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:52,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-01-08 14:06:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-01-08 14:06:52,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-01-08 14:06:52,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 590 transitions. [2019-01-08 14:06:52,680 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 590 transitions. Word has length 4 [2019-01-08 14:06:52,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:52,680 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 590 transitions. [2019-01-08 14:06:52,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:52,680 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 590 transitions. [2019-01-08 14:06:52,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:52,681 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:52,681 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:52,681 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:52,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:52,682 INFO L82 PathProgramCache]: Analyzing trace with hash 933972, now seen corresponding path program 1 times [2019-01-08 14:06:52,682 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:52,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:52,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:52,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:52,683 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:52,974 WARN L181 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2019-01-08 14:06:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:52,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:52,996 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:52,996 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:52,996 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [35] [2019-01-08 14:06:52,997 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:52,997 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:52,999 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:52,999 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:53,000 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:53,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:53,000 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:53,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:53,009 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:53,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:53,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:53,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:06:53,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:06:53,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,057 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:06:53,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:06:53,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:06:53,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,093 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:06:53,104 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:06:53,105 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,161 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,206 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,240 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,268 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,291 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,309 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,327 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:06:53,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:06:53,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:06:53,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:06:53,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,612 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:06:53,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:53,713 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:06:53,713 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,751 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,790 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,827 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,866 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,904 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:53,972 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:53,973 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-08 14:06:54,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-08 14:06:54,027 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:54,095 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:54,096 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:06:54,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,131 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:54,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 141 [2019-01-08 14:06:54,132 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:54,206 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:54,207 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:82 [2019-01-08 14:06:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:54,227 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:54,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:54,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:06:54,270 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:54,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:54,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:54,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:54,270 INFO L87 Difference]: Start difference. First operand 103 states and 590 transitions. Second operand 8 states. [2019-01-08 14:06:54,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:54,777 INFO L93 Difference]: Finished difference Result 145 states and 646 transitions. [2019-01-08 14:06:54,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:06:54,777 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:06:54,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:54,778 INFO L225 Difference]: With dead ends: 145 [2019-01-08 14:06:54,778 INFO L226 Difference]: Without dead ends: 143 [2019-01-08 14:06:54,779 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:06:54,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-01-08 14:06:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2019-01-08 14:06:54,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-08 14:06:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 599 transitions. [2019-01-08 14:06:54,797 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 599 transitions. Word has length 4 [2019-01-08 14:06:54,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:54,798 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 599 transitions. [2019-01-08 14:06:54,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 599 transitions. [2019-01-08 14:06:54,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:54,799 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:54,799 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:54,799 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:54,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:54,799 INFO L82 PathProgramCache]: Analyzing trace with hash 938128, now seen corresponding path program 1 times [2019-01-08 14:06:54,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:54,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:54,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:54,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:54,800 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:54,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:54,877 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:54,877 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:54,877 INFO L207 CegarAbsIntRunner]: [0], [14], [36], [37] [2019-01-08 14:06:54,878 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:54,878 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:54,882 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:54,882 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:06:54,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:54,883 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:54,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:54,883 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:54,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:54,891 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:54,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:54,900 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:54,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-08 14:06:54,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,915 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-08 14:06:54,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-08 14:06:54,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-08 14:06:54,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-08 14:06:54,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:54,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-08 14:06:54,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-08 14:06:54,975 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:55,029 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:55,072 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:55,103 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:55,129 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:55,150 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:55,167 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:55,185 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:55,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-08 14:06:55,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-08 14:06:55,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-08 14:06:55,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-08 14:06:55,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-08 14:06:55,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-08 14:06:55,528 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:55,562 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:55,597 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:55,634 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:55,670 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:55,710 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:55,775 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:55,775 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-08 14:06:55,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:55,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-08 14:06:55,805 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:55,866 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:55,866 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-08 14:06:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:55,916 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:55,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:55,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:06:55,946 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:55,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:06:55,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:06:55,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:06:55,946 INFO L87 Difference]: Start difference. First operand 104 states and 599 transitions. Second operand 6 states. [2019-01-08 14:06:56,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:56,445 INFO L93 Difference]: Finished difference Result 124 states and 613 transitions. [2019-01-08 14:06:56,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:06:56,446 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-08 14:06:56,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:56,448 INFO L225 Difference]: With dead ends: 124 [2019-01-08 14:06:56,448 INFO L226 Difference]: Without dead ends: 123 [2019-01-08 14:06:56,448 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:06:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-01-08 14:06:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2019-01-08 14:06:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-08 14:06:56,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-01-08 14:06:56,467 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 4 [2019-01-08 14:06:56,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:56,467 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-01-08 14:06:56,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:06:56,467 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-01-08 14:06:56,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:56,468 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:56,468 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:56,468 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:56,468 INFO L82 PathProgramCache]: Analyzing trace with hash 937816, now seen corresponding path program 1 times [2019-01-08 14:06:56,468 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:56,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:56,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:56,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:56,469 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:56,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:56,565 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:56,565 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:56,566 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [35] [2019-01-08 14:06:56,567 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:56,567 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:56,570 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:56,570 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:56,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:56,571 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:56,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:56,571 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:56,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:56,586 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:56,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:56,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:56,623 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:06:56,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:06:56,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:06:56,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,649 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:06:56,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,657 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:06:56,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,673 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:06:56,684 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:06:56,685 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,747 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,792 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,828 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,856 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,878 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,896 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,913 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:56,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:56,956 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:06:57,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:06:57,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:06:57,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:06:57,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:06:57,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,305 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:06:57,305 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:57,341 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:57,378 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:57,416 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:57,455 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:57,494 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:57,561 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:57,561 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-08 14:06:57,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-08 14:06:57,673 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:57,737 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:57,737 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:06:57,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:57,856 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-08 14:06:57,857 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:58,267 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:06:58,267 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-08 14:06:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:58,286 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:58,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:58,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:06:58,336 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:58,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:58,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:58,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:06:58,337 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 8 states. [2019-01-08 14:06:59,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:59,188 INFO L93 Difference]: Finished difference Result 176 states and 800 transitions. [2019-01-08 14:06:59,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:06:59,188 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:06:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:59,191 INFO L225 Difference]: With dead ends: 176 [2019-01-08 14:06:59,191 INFO L226 Difference]: Without dead ends: 174 [2019-01-08 14:06:59,191 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:06:59,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-01-08 14:06:59,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2019-01-08 14:06:59,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-08 14:06:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-08 14:06:59,219 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-08 14:06:59,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:59,219 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-08 14:06:59,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:59,219 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-08 14:06:59,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:59,220 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:59,220 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:59,220 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:59,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:59,220 INFO L82 PathProgramCache]: Analyzing trace with hash 953504, now seen corresponding path program 1 times [2019-01-08 14:06:59,221 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:59,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:59,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:59,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:59,222 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:59,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:59,323 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:59,323 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:59,323 INFO L207 CegarAbsIntRunner]: [0], [30], [36], [37] [2019-01-08 14:06:59,324 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:59,324 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:59,326 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:59,326 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:06:59,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:59,327 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:59,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:59,327 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:06:59,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:59,336 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:59,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:59,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-08 14:06:59,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,384 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-08 14:06:59,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-08 14:06:59,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-08 14:06:59,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-08 14:06:59,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:59,651 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-08 14:06:59,652 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:59,689 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:59,725 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:59,763 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:59,802 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:59,841 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:59,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:06:59,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-08 14:06:59,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-08 14:06:59,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-08 14:06:59,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-08 14:06:59,915 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-08 14:06:59,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-08 14:06:59,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-08 14:06:59,934 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:59,983 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:00,021 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:00,050 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:00,073 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:00,091 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:00,107 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:00,122 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:00,187 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:00,188 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-08 14:07:00,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:00,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-08 14:07:00,223 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:00,286 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:00,287 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-08 14:07:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:00,334 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:00,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:00,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:07:00,363 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:00,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:07:00,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:07:00,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:07:00,363 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 6 states. [2019-01-08 14:07:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:00,651 INFO L93 Difference]: Finished difference Result 135 states and 696 transitions. [2019-01-08 14:07:00,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:07:00,651 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-08 14:07:00,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:00,653 INFO L225 Difference]: With dead ends: 135 [2019-01-08 14:07:00,654 INFO L226 Difference]: Without dead ends: 134 [2019-01-08 14:07:00,654 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:07:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-01-08 14:07:00,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2019-01-08 14:07:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-08 14:07:00,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-08 14:07:00,681 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-08 14:07:00,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:00,682 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-08 14:07:00,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:07:00,682 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-08 14:07:00,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:07:00,683 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:00,683 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:07:00,683 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:00,683 INFO L82 PathProgramCache]: Analyzing trace with hash 29600478, now seen corresponding path program 1 times [2019-01-08 14:07:00,683 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:00,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:00,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:00,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:00,684 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:00,883 WARN L181 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2019-01-08 14:07:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:00,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:00,976 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:00,976 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:07:00,976 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [35] [2019-01-08 14:07:00,978 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:00,978 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:00,981 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:00,981 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:07:00,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:00,981 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:00,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:00,982 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 [2019-01-08 14:07:00,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:00,990 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:00,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:01,131 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-08 14:07:01,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:07:01,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:07:01,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,142 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:07:01,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:07:01,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:07:01,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,168 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:07:01,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:07:01,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-08 14:07:01,192 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:01,269 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:01,316 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:01,351 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:01,381 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:01,405 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:01,424 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:01,443 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:01,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:07:01,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,548 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:07:01,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:07:01,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:07:01,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,764 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-08 14:07:01,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:01,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-08 14:07:01,996 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:07:02,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-08 14:07:02,014 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:02,067 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:02,122 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:02,178 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:02,236 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:02,292 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:02,349 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:02,441 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:02,441 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-08 14:07:02,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-08 14:07:02,478 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:02,577 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:02,578 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-08 14:07:02,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,620 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:02,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-08 14:07:02,622 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:02,713 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:02,714 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-08 14:07:02,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:02,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 169 [2019-01-08 14:07:02,773 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:02,862 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:02,862 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:89 [2019-01-08 14:07:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:02,891 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:02,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:02,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:07:02,948 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:02,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:07:02,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:07:02,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:07:02,948 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 10 states. [2019-01-08 14:07:03,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:03,981 INFO L93 Difference]: Finished difference Result 212 states and 968 transitions. [2019-01-08 14:07:03,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:07:03,982 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:07:03,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:03,985 INFO L225 Difference]: With dead ends: 212 [2019-01-08 14:07:03,985 INFO L226 Difference]: Without dead ends: 205 [2019-01-08 14:07:03,986 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:07:03,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-01-08 14:07:04,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2019-01-08 14:07:04,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-01-08 14:07:04,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 789 transitions. [2019-01-08 14:07:04,021 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 789 transitions. Word has length 5 [2019-01-08 14:07:04,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:04,021 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 789 transitions. [2019-01-08 14:07:04,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:07:04,021 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 789 transitions. [2019-01-08 14:07:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:07:04,022 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:04,022 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:07:04,023 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:04,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:04,023 INFO L82 PathProgramCache]: Analyzing trace with hash 29600106, now seen corresponding path program 1 times [2019-01-08 14:07:04,023 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:04,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:04,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:04,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:04,024 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:04,386 WARN L181 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-01-08 14:07:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:04,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:04,429 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:04,429 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:07:04,429 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [35] [2019-01-08 14:07:04,431 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:04,431 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:04,432 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:04,433 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:07:04,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:04,433 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:04,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:04,433 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:04,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:04,446 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:04,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:04,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:07:04,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:07:04,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:07:04,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,692 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:07:04,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-08 14:07:04,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:04,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-08 14:07:05,026 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:07:05,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,050 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-08 14:07:05,051 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,113 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,177 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,246 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,317 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,385 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,459 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:07:05,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:07:05,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:07:05,552 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:07:05,556 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:07:05,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:07:05,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:07:05,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-08 14:07:05,568 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,637 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,677 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,708 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,731 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,752 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,768 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,784 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:05,875 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:05,876 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-08 14:07:05,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:05,912 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-08 14:07:05,913 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:06,004 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:06,004 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-08 14:07:06,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,051 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:06,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-08 14:07:06,052 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:06,145 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:06,145 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-08 14:07:06,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:06,204 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:06,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-08 14:07:06,206 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:06,296 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:06,296 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-08 14:07:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:06,327 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:06,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:06,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:07:06,388 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:06,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:07:06,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:07:06,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:07:06,389 INFO L87 Difference]: Start difference. First operand 122 states and 789 transitions. Second operand 10 states. [2019-01-08 14:07:09,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:09,924 INFO L93 Difference]: Finished difference Result 169 states and 850 transitions. [2019-01-08 14:07:09,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:07:09,925 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:07:09,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:09,927 INFO L225 Difference]: With dead ends: 169 [2019-01-08 14:07:09,927 INFO L226 Difference]: Without dead ends: 168 [2019-01-08 14:07:09,928 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:07:09,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-01-08 14:07:09,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2019-01-08 14:07:09,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-01-08 14:07:09,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 762 transitions. [2019-01-08 14:07:09,961 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 762 transitions. Word has length 5 [2019-01-08 14:07:09,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:09,962 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 762 transitions. [2019-01-08 14:07:09,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:07:09,962 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 762 transitions. [2019-01-08 14:07:09,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:07:09,962 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:09,963 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:07:09,963 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:09,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:09,963 INFO L82 PathProgramCache]: Analyzing trace with hash 29600602, now seen corresponding path program 1 times [2019-01-08 14:07:09,963 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:09,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:09,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:09,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:09,964 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:10,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:10,119 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:10,120 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:07:10,120 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [35] [2019-01-08 14:07:10,121 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:10,121 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:10,123 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:10,123 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:07:10,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:10,124 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:10,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:10,124 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:10,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:10,139 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:10,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:10,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-08 14:07:10,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-08 14:07:10,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,288 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-08 14:07:10,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-08 14:07:10,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-08 14:07:10,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,558 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-08 14:07:10,678 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-08 14:07:10,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:10,695 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-08 14:07:10,696 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:10,752 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:10,810 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:10,869 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:10,929 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:10,988 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:11,049 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:11,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:07:11,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:07:11,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:07:11,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:07:11,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:07:11,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:07:11,142 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:07:11,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-08 14:07:11,146 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:11,218 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:11,259 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:11,290 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:11,315 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:11,336 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:11,352 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:11,366 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:11,458 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:11,458 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-08 14:07:11,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,498 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-08 14:07:11,498 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:11,589 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:11,590 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-08 14:07:11,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,635 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:11,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-08 14:07:11,637 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:11,728 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:11,728 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-08 14:07:11,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:11,816 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:11,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-08 14:07:11,817 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:11,907 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:11,908 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-08 14:07:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:12,179 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:12,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:12,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:07:12,240 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:12,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:07:12,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:07:12,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:07:12,241 INFO L87 Difference]: Start difference. First operand 119 states and 762 transitions. Second operand 10 states. [2019-01-08 14:07:13,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:13,867 INFO L93 Difference]: Finished difference Result 176 states and 845 transitions. [2019-01-08 14:07:13,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:07:13,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:07:13,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:13,870 INFO L225 Difference]: With dead ends: 176 [2019-01-08 14:07:13,870 INFO L226 Difference]: Without dead ends: 172 [2019-01-08 14:07:13,871 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:07:13,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-01-08 14:07:13,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-01-08 14:07:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-01-08 14:07:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 788 transitions. [2019-01-08 14:07:13,899 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 788 transitions. Word has length 5 [2019-01-08 14:07:13,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:13,899 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 788 transitions. [2019-01-08 14:07:13,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:07:13,899 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 788 transitions. [2019-01-08 14:07:13,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:07:13,900 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:13,900 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:07:13,900 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:13,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:13,900 INFO L82 PathProgramCache]: Analyzing trace with hash 29588822, now seen corresponding path program 1 times [2019-01-08 14:07:13,901 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:13,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:13,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:13,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:13,901 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:14,077 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2019-01-08 14:07:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:14,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:14,121 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:14,121 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:07:14,122 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [35] [2019-01-08 14:07:14,123 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:14,123 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:14,125 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:14,125 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:07:14,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:14,126 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:14,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:14,126 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:14,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:14,138 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:14,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:14,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:07:14,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:07:14,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,267 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 [2019-01-08 14:07:14,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:07:14,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:07:14,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:14,500 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:07:14,500 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,541 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,580 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,621 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,670 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,710 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,761 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:07:14,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:07:14,790 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:07:14,804 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:07:14,818 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:07:14,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:07:14,824 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:07:14,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:07:14,834 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,886 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,926 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,957 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:14,982 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:15,002 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:15,019 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:15,034 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:15,102 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:15,102 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-08 14:07:15,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:15,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-08 14:07:15,197 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-08 14:07:15,231 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-08 14:07:16,770 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-08 14:07:16,771 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:838 [2019-01-08 14:07:17,279 WARN L181 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 169 [2019-01-08 14:07:17,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,291 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:17,292 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 134 [2019-01-08 14:07:17,293 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:17,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 178 [2019-01-08 14:07:17,521 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:17,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:17,768 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 162 [2019-01-08 14:07:17,769 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:17,973 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-01-08 14:07:17,974 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:341, output treesize:277 [2019-01-08 14:07:18,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 124 [2019-01-08 14:07:18,115 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 164 [2019-01-08 14:07:18,300 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:18,501 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:18,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 173 [2019-01-08 14:07:18,503 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:18,684 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-08 14:07:18,684 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:237 [2019-01-08 14:07:18,903 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-01-08 14:07:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:18,905 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:18,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:18,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-01-08 14:07:18,946 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:18,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:07:18,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:07:18,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:07:18,947 INFO L87 Difference]: Start difference. First operand 125 states and 788 transitions. Second operand 10 states. [2019-01-08 14:07:21,324 WARN L181 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 69 [2019-01-08 14:07:30,413 WARN L181 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 147 [2019-01-08 14:07:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:37,440 INFO L93 Difference]: Finished difference Result 235 states and 1248 transitions. [2019-01-08 14:07:37,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-08 14:07:37,441 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:07:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:37,443 INFO L225 Difference]: With dead ends: 235 [2019-01-08 14:07:37,443 INFO L226 Difference]: Without dead ends: 230 [2019-01-08 14:07:37,444 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=89, Invalid=150, Unknown=1, NotChecked=0, Total=240 [2019-01-08 14:07:37,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-01-08 14:07:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 145. [2019-01-08 14:07:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-01-08 14:07:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 973 transitions. [2019-01-08 14:07:37,482 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 973 transitions. Word has length 5 [2019-01-08 14:07:37,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:37,482 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 973 transitions. [2019-01-08 14:07:37,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:07:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 973 transitions. [2019-01-08 14:07:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:07:37,483 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:37,483 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:07:37,483 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:37,484 INFO L82 PathProgramCache]: Analyzing trace with hash 29589382, now seen corresponding path program 1 times [2019-01-08 14:07:37,484 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:37,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:37,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:37,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:37,485 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:37,625 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2019-01-08 14:07:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:37,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:37,650 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:37,650 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:07:37,650 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [36], [37] [2019-01-08 14:07:37,651 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:37,651 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:37,653 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:37,653 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:07:37,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:37,653 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:37,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:37,654 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:07:37,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:37,663 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:37,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:37,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:07:37,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:07:37,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,790 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:07:37,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:07:37,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:37,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:07:38,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:38,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:38,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:38,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:38,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:38,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:38,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:38,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:38,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:38,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:38,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:07:38,036 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:38,076 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:38,116 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:38,156 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:38,197 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:38,238 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:38,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:07:38,292 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:07:38,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:07:38,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:07:38,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:07:38,305 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:07:38,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:07:38,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:07:38,322 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:38,373 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:38,413 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:38,444 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:38,468 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:38,488 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:38,505 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:38,521 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:38,588 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:07:38,588 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-08 14:07:38,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:38,824 INFO L303 Elim1Store]: Index analysis took 208 ms [2019-01-08 14:07:38,880 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-08 14:07:38,880 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-08 14:07:38,907 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-08 14:07:40,444 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-08 14:07:40,444 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:836 [2019-01-08 14:07:40,842 WARN L181 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 164 [2019-01-08 14:07:40,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:40,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:40,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:40,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:40,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:40,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:40,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:40,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:40,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:40,858 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 166 [2019-01-08 14:07:40,859 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,094 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:41,095 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 158 [2019-01-08 14:07:41,096 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:41,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 174 [2019-01-08 14:07:41,313 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:41,517 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-08 14:07:41,517 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:333, output treesize:277 [2019-01-08 14:07:52,063 WARN L181 SmtUtils]: Spent 9.25 s on a formula simplification that was a NOOP. DAG size: 158 [2019-01-08 14:07:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:52,068 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:52,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:52,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:07:52,108 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:52,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:07:52,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:07:52,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:07:52,108 INFO L87 Difference]: Start difference. First operand 145 states and 973 transitions. Second operand 8 states. [2019-01-08 14:08:06,823 WARN L181 SmtUtils]: Spent 5.06 s on a formula simplification. DAG size of input: 168 DAG size of output: 161 [2019-01-08 14:08:11,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:08:11,672 INFO L93 Difference]: Finished difference Result 254 states and 1519 transitions. [2019-01-08 14:08:11,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:08:11,673 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:08:11,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:08:11,676 INFO L225 Difference]: With dead ends: 254 [2019-01-08 14:08:11,676 INFO L226 Difference]: Without dead ends: 253 [2019-01-08 14:08:11,677 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:08:11,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2019-01-08 14:08:11,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 197. [2019-01-08 14:08:11,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-01-08 14:08:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 1447 transitions. [2019-01-08 14:08:11,726 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 1447 transitions. Word has length 5 [2019-01-08 14:08:11,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:08:11,727 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 1447 transitions. [2019-01-08 14:08:11,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:08:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 1447 transitions. [2019-01-08 14:08:11,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:08:11,727 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:08:11,727 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:08:11,728 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:08:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:11,728 INFO L82 PathProgramCache]: Analyzing trace with hash 29588574, now seen corresponding path program 1 times [2019-01-08 14:08:11,728 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:08:11,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:11,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:11,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:11,729 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:08:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:11,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:11,888 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:08:11,888 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:08:11,888 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [32], [35] [2019-01-08 14:08:11,888 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:08:11,889 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:08:11,890 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:08:11,891 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:08:11,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:11,891 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:08:11,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:11,891 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:08:11,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:11,899 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:08:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:11,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:08:11,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:08:11,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:08:11,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:08:11,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:08:11,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,975 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:08:11,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,989 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:08:11,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:11,999 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 [2019-01-08 14:08:12,010 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 [2019-01-08 14:08:12,011 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,068 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,113 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,148 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,176 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,199 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,219 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,236 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:08:12,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,327 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 [2019-01-08 14:08:12,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,379 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:08:12,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,441 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 [2019-01-08 14:08:12,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:08:12,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,614 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:08:12,615 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,653 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,690 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,728 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,767 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,804 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:12,872 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:12,872 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-08 14:08:12,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:12,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-08 14:08:12,973 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-08 14:08:13,000 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-08 14:08:14,532 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-08 14:08:14,532 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:836 [2019-01-08 14:08:14,931 WARN L181 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 164 [2019-01-08 14:08:14,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:14,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:14,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:14,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:14,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:14,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:14,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:14,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:14,946 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 112 treesize of output 178 [2019-01-08 14:08:14,946 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:15,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,198 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:08:15,199 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 158 [2019-01-08 14:08:15,200 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:15,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 166 [2019-01-08 14:08:15,416 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:15,616 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-01-08 14:08:15,616 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:333, output treesize:277 [2019-01-08 14:08:15,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:15,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 146 [2019-01-08 14:08:15,817 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:16,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,016 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:08:16,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 165 [2019-01-08 14:08:16,018 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:16,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:16,221 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 164 [2019-01-08 14:08:16,222 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:16,402 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-08 14:08:16,402 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:239 [2019-01-08 14:08:16,688 WARN L181 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-01-08 14:08:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:16,689 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:08:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:16,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:08:16,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:08:16,748 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:08:16,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:08:16,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:08:16,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:08:16,749 INFO L87 Difference]: Start difference. First operand 197 states and 1447 transitions. Second operand 10 states. [2019-01-08 14:08:19,413 WARN L181 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 73 [2019-01-08 14:08:31,571 WARN L181 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 147 [2019-01-08 14:08:37,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:08:37,433 INFO L93 Difference]: Finished difference Result 300 states and 1910 transitions. [2019-01-08 14:08:37,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:08:37,434 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:08:37,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:08:37,437 INFO L225 Difference]: With dead ends: 300 [2019-01-08 14:08:37,437 INFO L226 Difference]: Without dead ends: 299 [2019-01-08 14:08:37,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=78, Invalid=131, Unknown=1, NotChecked=0, Total=210 [2019-01-08 14:08:37,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2019-01-08 14:08:37,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 195. [2019-01-08 14:08:37,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-01-08 14:08:37,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 1429 transitions. [2019-01-08 14:08:37,516 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 1429 transitions. Word has length 5 [2019-01-08 14:08:37,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:08:37,516 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 1429 transitions. [2019-01-08 14:08:37,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:08:37,516 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 1429 transitions. [2019-01-08 14:08:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:08:37,517 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:08:37,517 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:08:37,518 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:08:37,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:37,518 INFO L82 PathProgramCache]: Analyzing trace with hash 29589070, now seen corresponding path program 1 times [2019-01-08 14:08:37,518 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:08:37,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:37,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:37,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:37,519 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:08:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:37,844 WARN L181 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2019-01-08 14:08:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:37,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:37,917 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:08:37,918 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:08:37,918 INFO L207 CegarAbsIntRunner]: [0], [6], [26], [32], [35] [2019-01-08 14:08:37,919 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:08:37,919 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:08:37,922 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:08:37,922 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:08:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:37,923 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:08:37,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:37,923 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:08:37,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:37,936 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:08:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:37,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:08:37,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:37,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:08:38,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,023 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:08:38,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,082 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:08:38,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,160 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:08:38,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,247 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:08:38,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:38,353 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:08:38,353 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:38,405 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:38,461 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:38,521 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:38,577 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:38,637 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:38,709 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:08:38,713 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-08 14:08:38,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-08 14:08:38,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-08 14:08:38,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-08 14:08:38,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-08 14:08:38,730 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-08 14:08:38,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-08 14:08:38,743 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:38,794 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:38,834 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:38,864 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:38,889 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:38,908 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:38,925 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:38,941 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:39,009 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:08:39,009 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-08 14:08:39,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:39,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-08 14:08:39,106 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-08 14:08:39,142 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-08 14:08:40,689 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-08 14:08:40,690 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:838 [2019-01-08 14:08:47,982 WARN L181 SmtUtils]: Spent 7.09 s on a formula simplification. DAG size of input: 431 DAG size of output: 169 [2019-01-08 14:08:47,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:47,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:47,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:47,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:47,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:47,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:47,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:47,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:47,998 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 112 treesize of output 174 [2019-01-08 14:08:47,998 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:48,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,243 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:08:48,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 158 [2019-01-08 14:08:48,245 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:48,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 170 [2019-01-08 14:08:48,475 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:48,678 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-01-08 14:08:48,679 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:341, output treesize:277 [2019-01-08 14:08:48,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:48,831 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:08:48,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 169 [2019-01-08 14:08:48,832 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:49,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,056 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 152 [2019-01-08 14:08:49,057 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:49,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:49,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 156 [2019-01-08 14:08:49,267 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:49,432 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-08 14:08:49,432 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:239 [2019-01-08 14:08:49,685 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-01-08 14:08:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:49,686 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:08:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:49,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:08:49,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:08:49,740 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:08:49,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:08:49,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:08:49,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:08:49,741 INFO L87 Difference]: Start difference. First operand 195 states and 1429 transitions. Second operand 10 states. [2019-01-08 14:08:50,386 WARN L181 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 119 [2019-01-08 14:09:00,208 WARN L181 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 147 [2019-01-08 14:09:01,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:09:01,349 INFO L93 Difference]: Finished difference Result 319 states and 2106 transitions. [2019-01-08 14:09:01,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:09:01,350 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:09:01,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:09:01,353 INFO L225 Difference]: With dead ends: 319 [2019-01-08 14:09:01,353 INFO L226 Difference]: Without dead ends: 317 [2019-01-08 14:09:01,353 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:09:01,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2019-01-08 14:09:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 236. [2019-01-08 14:09:01,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2019-01-08 14:09:01,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 1823 transitions. [2019-01-08 14:09:01,420 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 1823 transitions. Word has length 5 [2019-01-08 14:09:01,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:09:01,420 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 1823 transitions. [2019-01-08 14:09:01,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:09:01,420 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 1823 transitions. [2019-01-08 14:09:01,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:09:01,421 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:09:01,421 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:09:01,421 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:09:01,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:09:01,422 INFO L82 PathProgramCache]: Analyzing trace with hash 29604758, now seen corresponding path program 1 times [2019-01-08 14:09:01,422 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:09:01,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:09:01,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:09:01,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:09:01,423 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:09:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:09:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:09:01,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:09:01,545 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:09:01,545 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:09:01,545 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [36], [37] [2019-01-08 14:09:01,547 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:09:01,547 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:09:01,550 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:09:01,550 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:09:01,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:09:01,550 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:09:01,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:09:01,551 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:09:01,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:09:01,568 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:09:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:09:01,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:09:01,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-08 14:09:01,625 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-08 14:09:01,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,630 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-08 14:09:01,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-08 14:09:01,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,647 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-08 14:09:01,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,661 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-08 14:09:01,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,673 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-08 14:09:01,685 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-08 14:09:01,686 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:01,741 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:01,784 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:01,818 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:01,844 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:01,865 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:01,883 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:01,901 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:01,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-08 14:09:01,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:01,961 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-08 14:09:02,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,007 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-08 14:09:02,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-08 14:09:02,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-08 14:09:02,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-08 14:09:02,241 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:02,277 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:02,311 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:02,348 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:02,385 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:02,424 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:09:02,489 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. [2019-01-08 14:09:02,490 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:113, output treesize:121 [2019-01-08 14:09:02,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:02,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 149 [2019-01-08 14:09:02,589 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-08 14:09:02,616 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-08 14:09:04,276 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 45 dim-0 vars, and 9 xjuncts. [2019-01-08 14:09:04,277 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:131, output treesize:887 [2019-01-08 14:09:05,008 WARN L181 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 150 [2019-01-08 14:09:05,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,024 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:09:05,024 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 108 treesize of output 158 [2019-01-08 14:09:05,025 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:05,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 23 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 178 [2019-01-08 14:09:05,247 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:05,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:09:05,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 125 [2019-01-08 14:09:05,493 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:09:05,657 INFO L267 ElimStorePlain]: Start of recursive call 1: 17 dim-0 vars, 3 dim-1 vars, End of recursive call: 17 dim-0 vars, and 3 xjuncts. [2019-01-08 14:09:05,658 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 20 variables, input treesize:308, output treesize:248 [2019-01-08 14:09:19,074 WARN L181 SmtUtils]: Spent 12.90 s on a formula simplification that was a NOOP. DAG size: 143 [2019-01-08 14:09:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:09:19,079 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:09:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:09:19,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:09:19,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:09:19,142 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:09:19,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:09:19,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:09:19,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:09:19,143 INFO L87 Difference]: Start difference. First operand 236 states and 1823 transitions. Second operand 8 states. [2019-01-08 14:09:41,542 WARN L181 SmtUtils]: Spent 14.11 s on a formula simplification. DAG size of input: 153 DAG size of output: 118 [2019-01-08 14:09:47,547 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:8192 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:652) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:256) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:715) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2019-01-08 14:09:47,552 INFO L168 Benchmark]: Toolchain (without parser) took 288512.17 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 973.6 MB). Free memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: -593.9 MB). Peak memory consumption was 379.7 MB. Max. memory is 7.1 GB. [2019-01-08 14:09:47,552 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:09:47,553 INFO L168 Benchmark]: Boogie Procedure Inliner took 77.65 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:09:47,553 INFO L168 Benchmark]: Boogie Preprocessor took 35.34 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:09:47,553 INFO L168 Benchmark]: RCFGBuilder took 561.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 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. [2019-01-08 14:09:47,553 INFO L168 Benchmark]: TraceAbstraction took 287827.05 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 973.6 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -615.0 MB). Peak memory consumption was 358.6 MB. Max. memory is 7.1 GB. [2019-01-08 14:09:47,555 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 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 77.65 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.34 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 561.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 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 287827.05 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 973.6 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -615.0 MB). Peak memory consumption was 358.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -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...