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-b7bd044-m [2019-01-18 17:39:30,661 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-18 17:39:30,663 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-18 17:39:30,678 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-18 17:39:30,678 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-18 17:39:30,679 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-18 17:39:30,680 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-18 17:39:30,682 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-18 17:39:30,691 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-18 17:39:30,692 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-18 17:39:30,693 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-18 17:39:30,716 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 [2019-01-18 17:39:30,729 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-18 17:39:30,729 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-18 17:39:30,730 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-18 17:39:30,730 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-18 17:39:30,730 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-18 17:39:30,730 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-18 17:39:30,730 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-18 17:39:30,731 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-18 17:39:30,731 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-18 17:39:30,731 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-18 17:39:30,731 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-18 17:39:30,731 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-18 17:39:30,732 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-18 17:39:30,732 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-18 17:39:30,733 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-18 17:39:30,733 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-18 17:39:30,733 INFO L133 SettingsManager]: * Use SBE=true [2019-01-18 17:39:30,733 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-18 17:39:30,733 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-18 17:39:30,734 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-18 17:39:30,734 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-18 17:39:30,734 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-18 17:39:30,734 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-18 17:39:30,734 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-18 17:39:30,734 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-18 17:39:30,735 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-18 17:39:30,735 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-18 17:39:30,735 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-18 17:39:30,735 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-18 17:39:30,735 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-18 17:39:30,736 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-18 17:39:30,736 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-18 17:39:30,736 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-18 17:39:30,736 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-18 17:39:30,736 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-18 17:39:30,737 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-18 17:39:30,737 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-18 17:39:30,737 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-18 17:39:30,737 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-18 17:39:30,737 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-18 17:39:30,791 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-18 17:39:30,807 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-18 17:39:30,812 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-18 17:39:30,813 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-18 17:39:30,814 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-18 17:39:30,814 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl [2019-01-18 17:39:30,815 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl' [2019-01-18 17:39:30,863 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-18 17:39:30,865 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-18 17:39:30,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-18 17:39:30,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-18 17:39:30,866 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-18 17:39:30,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:30" (1/1) ... [2019-01-18 17:39:30,899 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:30" (1/1) ... [2019-01-18 17:39:30,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-18 17:39:30,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-18 17:39:30,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-18 17:39:30,930 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-18 17:39:30,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:30" (1/1) ... [2019-01-18 17:39:30,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:30" (1/1) ... [2019-01-18 17:39:30,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:30" (1/1) ... [2019-01-18 17:39:30,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:30" (1/1) ... [2019-01-18 17:39:30,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:30" (1/1) ... [2019-01-18 17:39:30,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:30" (1/1) ... [2019-01-18 17:39:30,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:30" (1/1) ... [2019-01-18 17:39:30,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-18 17:39:30,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-18 17:39:30,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-18 17:39:30,969 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-18 17:39:30,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-18 17:39:31,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-18 17:39:31,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-18 17:39:31,421 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-18 17:39:31,422 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-01-18 17:39:31,423 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:39:31 BoogieIcfgContainer [2019-01-18 17:39:31,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-18 17:39:31,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-18 17:39:31,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-18 17:39:31,428 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-18 17:39:31,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:30" (1/2) ... [2019-01-18 17:39:31,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48153f67 and model type speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:39:31, skipping insertion in model container [2019-01-18 17:39:31,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:39:31" (2/2) ... [2019-01-18 17:39:31,431 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-unlimited.bpl [2019-01-18 17:39:31,441 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-18 17:39:31,449 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-01-18 17:39:31,463 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-01-18 17:39:31,495 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-18 17:39:31,495 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-18 17:39:31,495 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-18 17:39:31,496 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-18 17:39:31,496 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-18 17:39:31,496 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-18 17:39:31,496 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-18 17:39:31,496 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-18 17:39:31,511 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-01-18 17:39:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-18 17:39:31,517 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:31,518 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-18 17:39:31,521 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:31,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:31,526 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-01-18 17:39:31,527 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:31,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:31,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:31,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:31,569 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:31,746 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 17:39:31,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-18 17:39:31,747 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:39:31,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-18 17:39:31,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-18 17:39:31,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 17:39:31,766 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-01-18 17:39:31,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:31,971 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-01-18 17:39:31,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 17:39:31,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-18 17:39:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:31,986 INFO L225 Difference]: With dead ends: 37 [2019-01-18 17:39:31,987 INFO L226 Difference]: Without dead ends: 32 [2019-01-18 17:39:31,990 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 17:39:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-18 17:39:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-01-18 17:39:32,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-01-18 17:39:32,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-01-18 17:39:32,026 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-01-18 17:39:32,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:32,027 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-01-18 17:39:32,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-18 17:39:32,027 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-01-18 17:39:32,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:32,028 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:32,028 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:32,041 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:32,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:32,045 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-01-18 17:39:32,045 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:32,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:32,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:32,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:32,047 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:32,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:32,208 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:32,209 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:39:32,210 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-01-18 17:39:32,258 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:32,259 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:32,331 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:32,332 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. [2019-01-18 17:39:32,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:32,339 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:32,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:32,340 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:32,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:32,357 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:32,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:32,624 WARN L181 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-18 17:39:32,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:39:32,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:39:32,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,712 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:39:32,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:39:32,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:39:32,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,985 INFO L303 Elim1Store]: Index analysis took 134 ms [2019-01-18 17:39:32,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:39:33,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,101 INFO L303 Elim1Store]: Index analysis took 107 ms [2019-01-18 17:39:33,104 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:39:33,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 17:39:33,145 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:33,600 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:33,988 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,042 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,088 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,124 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,179 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,214 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 17:39:34,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,393 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 17:39:34,501 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2019-01-18 17:39:34,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,516 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 83 treesize of output 103 [2019-01-18 17:39:34,664 WARN L181 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-18 17:39:34,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 17:39:34,927 WARN L181 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-18 17:39:34,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,037 INFO L303 Elim1Store]: Index analysis took 106 ms [2019-01-18 17:39:35,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 17:39:35,195 WARN L181 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-18 17:39:35,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,301 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 17:39:35,495 WARN L181 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 17:39:35,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,521 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 17:39:35,523 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:35,637 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:35,776 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:35,858 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:35,937 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,071 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,169 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,316 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:36,317 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:147, output treesize:153 [2019-01-18 17:39:36,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 17:39:36,421 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,691 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:36,692 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-18 17:39:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:36,719 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:36,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:36,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:39:36,871 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:36,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:39:36,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:39:36,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:36,872 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2019-01-18 17:39:47,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:47,941 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2019-01-18 17:39:47,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:39:47,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 17:39:47,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:47,945 INFO L225 Difference]: With dead ends: 63 [2019-01-18 17:39:47,945 INFO L226 Difference]: Without dead ends: 60 [2019-01-18 17:39:47,946 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:39:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-18 17:39:47,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-01-18 17:39:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-18 17:39:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2019-01-18 17:39:47,954 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2019-01-18 17:39:47,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:47,954 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2019-01-18 17:39:47,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:39:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2019-01-18 17:39:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:47,955 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:47,955 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:47,956 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:47,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:47,956 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2019-01-18 17:39:47,956 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:47,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:47,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:47,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:47,958 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:48,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:48,185 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:48,185 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:39:48,185 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2019-01-18 17:39:48,186 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:48,186 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:48,194 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:48,195 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. [2019-01-18 17:39:48,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:48,195 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:48,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:48,196 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:48,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:48,213 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:48,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:48,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:39:48,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:39:48,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:39:48,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,346 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:39:48,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:39:48,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:39:48,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:39:48,453 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 17:39:48,454 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,540 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,602 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,649 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,687 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,715 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,739 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,767 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:39:48,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 17:39:49,054 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2019-01-18 17:39:49,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 17:39:49,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,169 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 17:39:49,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:39:49,438 WARN L181 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 17:39:49,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:39:49,457 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:49,511 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:49,561 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:49,614 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:49,667 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:49,721 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:49,815 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:49,815 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-18 17:39:49,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-18 17:39:49,887 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:49,981 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:49,981 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-18 17:39:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:50,008 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:50,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:50,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:39:50,040 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:50,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:39:50,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:39:50,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:50,041 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2019-01-18 17:39:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:50,959 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2019-01-18 17:39:50,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:39:50,960 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 17:39:50,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:50,962 INFO L225 Difference]: With dead ends: 62 [2019-01-18 17:39:50,962 INFO L226 Difference]: Without dead ends: 60 [2019-01-18 17:39:50,963 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:39:50,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-18 17:39:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2019-01-18 17:39:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-18 17:39:50,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2019-01-18 17:39:50,971 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2019-01-18 17:39:50,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:50,971 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2019-01-18 17:39:50,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:39:50,972 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2019-01-18 17:39:50,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:50,972 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:50,972 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:50,973 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:50,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:50,973 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2019-01-18 17:39:50,973 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:50,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:50,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:50,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:50,974 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:51,027 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 17:39:51,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-18 17:39:51,028 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:39:51,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-18 17:39:51,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-18 17:39:51,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 17:39:51,029 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2019-01-18 17:39:51,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:51,123 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2019-01-18 17:39:51,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 17:39:51,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-18 17:39:51,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:51,125 INFO L225 Difference]: With dead ends: 31 [2019-01-18 17:39:51,125 INFO L226 Difference]: Without dead ends: 30 [2019-01-18 17:39:51,126 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 17:39:51,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-18 17:39:51,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-01-18 17:39:51,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-18 17:39:51,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2019-01-18 17:39:51,133 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2019-01-18 17:39:51,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:51,133 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2019-01-18 17:39:51,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-18 17:39:51,134 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2019-01-18 17:39:51,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:51,134 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:51,134 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:51,135 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:51,135 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2019-01-18 17:39:51,135 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:51,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:51,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:51,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:51,137 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:51,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:51,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:51,211 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:51,212 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:39:51,212 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2019-01-18 17:39:51,213 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:51,213 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:51,220 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:51,221 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. [2019-01-18 17:39:51,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:51,221 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:51,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:51,222 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:51,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:51,239 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:51,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:51,363 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-18 17:39:51,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,368 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:39:51,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 17:39:51,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,494 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 17:39:51,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 17:39:51,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:39:51,795 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 17:39:51,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:39:51,813 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:51,878 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:51,943 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:52,026 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:52,144 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:52,232 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:52,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:39:52,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:39:52,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:39:52,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:39:52,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:39:52,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:39:52,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:39:52,526 INFO L303 Elim1Store]: Index analysis took 178 ms [2019-01-18 17:39:52,528 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 17:39:52,529 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:52,737 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:52,795 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:52,839 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:52,870 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:52,961 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:52,982 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:53,000 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:53,094 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:53,094 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:121, output treesize:125 [2019-01-18 17:39:53,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,199 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 46 treesize of output 126 [2019-01-18 17:39:53,200 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:53,311 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:53,312 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-18 17:39:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:53,343 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:53,374 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-18 17:39:53,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-18 17:39:53,374 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:39:53,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 17:39:53,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 17:39:53,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 17:39:53,375 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2019-01-18 17:39:53,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:53,460 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2019-01-18 17:39:53,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 17:39:53,461 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-18 17:39:53,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:53,462 INFO L225 Difference]: With dead ends: 32 [2019-01-18 17:39:53,463 INFO L226 Difference]: Without dead ends: 31 [2019-01-18 17:39:53,463 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 17:39:53,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-01-18 17:39:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-01-18 17:39:53,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-18 17:39:53,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2019-01-18 17:39:53,471 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2019-01-18 17:39:53,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:53,472 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2019-01-18 17:39:53,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 17:39:53,472 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2019-01-18 17:39:53,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:53,472 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:53,473 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:53,473 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:53,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:53,473 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2019-01-18 17:39:53,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:53,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:53,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:53,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:53,474 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:53,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:53,680 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:53,680 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:39:53,680 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2019-01-18 17:39:53,683 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:53,683 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:53,690 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:53,690 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. [2019-01-18 17:39:53,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:53,691 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:53,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:53,691 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:53,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:53,703 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:53,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:53,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:39:53,780 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:39:53,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,806 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:39:53,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,820 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:39:53,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:39:53,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:39:53,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:39:54,018 INFO L303 Elim1Store]: Index analysis took 112 ms [2019-01-18 17:39:54,020 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 17:39:54,021 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:54,105 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:54,164 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:54,212 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:54,246 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:54,276 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:54,300 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:54,321 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:54,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,375 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:39:54,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 17:39:54,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 17:39:54,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 17:39:54,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:39:54,793 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 17:39:54,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:54,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:39:54,812 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:54,867 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:54,919 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:54,973 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:55,031 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:55,090 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:55,192 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:55,192 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-18 17:39:55,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,292 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 46 treesize of output 126 [2019-01-18 17:39:55,293 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:55,395 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:55,395 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-18 17:39:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:55,416 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:55,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:55,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:39:55,447 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:55,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:39:55,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:39:55,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:55,448 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2019-01-18 17:39:56,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:56,335 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2019-01-18 17:39:56,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:39:56,336 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 17:39:56,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:56,337 INFO L225 Difference]: With dead ends: 65 [2019-01-18 17:39:56,338 INFO L226 Difference]: Without dead ends: 64 [2019-01-18 17:39:56,338 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:39:56,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-01-18 17:39:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2019-01-18 17:39:56,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-18 17:39:56,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2019-01-18 17:39:56,348 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2019-01-18 17:39:56,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:56,348 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2019-01-18 17:39:56,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:39:56,348 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2019-01-18 17:39:56,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:56,349 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:56,349 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:56,349 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:56,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:56,349 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2019-01-18 17:39:56,350 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:56,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:56,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:56,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:56,351 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:56,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:56,407 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:56,407 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:39:56,407 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2019-01-18 17:39:56,410 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:56,410 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:56,414 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:56,414 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. [2019-01-18 17:39:56,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:56,415 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:56,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:56,415 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:56,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:56,424 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:56,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:56,466 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:39:56,468 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:39:56,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:39:56,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:39:56,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:39:56,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:39:56,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,658 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:39:56,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 17:39:56,675 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,756 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,817 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,863 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,900 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,937 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,960 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,986 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,047 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:39:57,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 17:39:57,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,179 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 [2019-01-18 17:39:57,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 17:39:57,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:39:57,476 WARN L181 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 17:39:57,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,494 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:39:57,495 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,548 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,601 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,654 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,712 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,770 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,865 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:57,866 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-18 17:39:58,031 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2019-01-18 17:39:58,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 17:39:58,067 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:58,242 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:58,243 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-18 17:39:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:58,261 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:58,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:58,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:39:58,292 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:58,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:39:58,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:39:58,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:58,293 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2019-01-18 17:39:59,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:59,029 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2019-01-18 17:39:59,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:39:59,030 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 17:39:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:59,031 INFO L225 Difference]: With dead ends: 67 [2019-01-18 17:39:59,032 INFO L226 Difference]: Without dead ends: 65 [2019-01-18 17:39:59,032 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:39:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-01-18 17:39:59,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2019-01-18 17:39:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-01-18 17:39:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 132 transitions. [2019-01-18 17:39:59,041 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 132 transitions. Word has length 3 [2019-01-18 17:39:59,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:59,041 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 132 transitions. [2019-01-18 17:39:59,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:39:59,041 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 132 transitions. [2019-01-18 17:39:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:59,042 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:59,042 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:59,042 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:59,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:59,043 INFO L82 PathProgramCache]: Analyzing trace with hash 954866, now seen corresponding path program 1 times [2019-01-18 17:39:59,043 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:59,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:59,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:59,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:59,044 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:59,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:59,172 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:59,175 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:59,175 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [35] [2019-01-18 17:39:59,178 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:59,178 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:59,186 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:59,186 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. [2019-01-18 17:39:59,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:59,186 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:59,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:59,186 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:59,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:59,203 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:59,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:59,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:39:59,257 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:39:59,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:39:59,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:39:59,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,296 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:39:59,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,322 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:39:59,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,346 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:39:59,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 17:39:59,366 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,552 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,650 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,699 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,735 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,764 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,787 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,809 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 17:39:59,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 17:40:00,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 17:40:00,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 17:40:00,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 17:40:00,460 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-18 17:40:00,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 17:40:00,666 WARN L181 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 17:40:00,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:00,697 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 17:40:00,698 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:00,775 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:00,854 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:00,933 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,014 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,094 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,175 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,301 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:01,302 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-18 17:40:01,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 17:40:01,403 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,530 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:01,530 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-18 17:40:01,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,733 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:01,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-18 17:40:01,735 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,866 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:01,867 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-18 17:40:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:01,942 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:02,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:02,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:40:02,016 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:02,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:02,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:02,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:02,017 INFO L87 Difference]: Start difference. First operand 34 states and 132 transitions. Second operand 8 states. [2019-01-18 17:40:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:06,336 INFO L93 Difference]: Finished difference Result 82 states and 191 transitions. [2019-01-18 17:40:06,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:40:06,337 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:40:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:06,339 INFO L225 Difference]: With dead ends: 82 [2019-01-18 17:40:06,339 INFO L226 Difference]: Without dead ends: 80 [2019-01-18 17:40:06,340 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:40:06,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-18 17:40:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2019-01-18 17:40:06,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-01-18 17:40:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 128 transitions. [2019-01-18 17:40:06,349 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 128 transitions. Word has length 4 [2019-01-18 17:40:06,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:06,349 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 128 transitions. [2019-01-18 17:40:06,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 128 transitions. [2019-01-18 17:40:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:40:06,350 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:06,350 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:40:06,350 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:06,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:06,350 INFO L82 PathProgramCache]: Analyzing trace with hash 955426, now seen corresponding path program 1 times [2019-01-18 17:40:06,351 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:06,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:06,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:06,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:06,352 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:06,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:06,432 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:06,432 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:40:06,433 INFO L207 CegarAbsIntRunner]: [0], [32], [36], [37] [2019-01-18 17:40:06,434 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:06,435 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:06,443 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:06,443 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. [2019-01-18 17:40:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:06,444 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:06,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:06,444 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:06,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:06,456 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:06,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:06,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-18 17:40:06,620 WARN L181 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2019-01-18 17:40:06,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,634 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-18 17:40:06,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,703 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-18 17:40:06,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-18 17:40:06,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-18 17:40:07,049 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2019-01-18 17:40:07,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-18 17:40:07,075 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,145 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,214 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,288 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,355 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,430 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,564 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:40:07,569 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-18 17:40:07,575 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-18 17:40:07,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-18 17:40:07,585 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-18 17:40:07,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-18 17:40:07,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-18 17:40:07,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-18 17:40:07,651 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,726 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,781 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,823 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,853 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,876 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,896 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,916 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:08,006 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:08,007 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-18 17:40:08,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,758 INFO L303 Elim1Store]: Index analysis took 102 ms [2019-01-18 17:40:08,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 149 [2019-01-18 17:40:08,831 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-18 17:40:08,886 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-18 17:40:11,244 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 54 dim-0 vars, and 9 xjuncts. [2019-01-18 17:40:11,245 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:131, output treesize:873 [2019-01-18 17:40:26,452 WARN L181 SmtUtils]: Spent 12.96 s on a formula simplification. DAG size of input: 478 DAG size of output: 101 [2019-01-18 17:40:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:26,458 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:26,484 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-18 17:40:26,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-18 17:40:26,484 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:40:26,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 17:40:26,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 17:40:26,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-18 17:40:26,485 INFO L87 Difference]: Start difference. First operand 36 states and 128 transitions. Second operand 4 states. [2019-01-18 17:40:26,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:26,551 INFO L93 Difference]: Finished difference Result 40 states and 140 transitions. [2019-01-18 17:40:26,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 17:40:26,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-18 17:40:26,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:26,552 INFO L225 Difference]: With dead ends: 40 [2019-01-18 17:40:26,552 INFO L226 Difference]: Without dead ends: 39 [2019-01-18 17:40:26,553 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-18 17:40:26,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-01-18 17:40:26,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-01-18 17:40:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-18 17:40:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 138 transitions. [2019-01-18 17:40:26,561 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 138 transitions. Word has length 4 [2019-01-18 17:40:26,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:26,561 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 138 transitions. [2019-01-18 17:40:26,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 17:40:26,562 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 138 transitions. [2019-01-18 17:40:26,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:40:26,562 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:26,562 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:40:26,563 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:26,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:26,563 INFO L82 PathProgramCache]: Analyzing trace with hash 954990, now seen corresponding path program 1 times [2019-01-18 17:40:26,563 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:26,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:26,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:26,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:26,564 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:26,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:26,647 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:26,648 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:40:26,648 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [35] [2019-01-18 17:40:26,649 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:26,649 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:26,655 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:26,655 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. [2019-01-18 17:40:26,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:26,656 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:26,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:26,656 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:26,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:26,668 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:26,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:26,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,721 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 17:40:26,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,814 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 101 treesize of output 104 [2019-01-18 17:40:26,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 17:40:26,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,993 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 17:40:27,096 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-18 17:40:27,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 17:40:27,254 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-18 17:40:27,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 17:40:27,449 WARN L181 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 17:40:27,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,475 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 17:40:27,476 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,567 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,665 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,768 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,866 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,966 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,068 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:40:28,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:40:28,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:40:28,192 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:40:28,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:40:28,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:40:28,231 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:40:28,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 17:40:28,245 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,413 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,470 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,515 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,552 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,578 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,601 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,626 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,753 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:28,754 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-18 17:40:28,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 17:40:28,790 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,914 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:28,915 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-18 17:40:28,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-18 17:40:28,960 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:29,118 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:29,119 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-18 17:40:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:29,213 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:29,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:29,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:40:29,283 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:29,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:29,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:29,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:29,284 INFO L87 Difference]: Start difference. First operand 38 states and 138 transitions. Second operand 8 states. [2019-01-18 17:40:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:33,375 INFO L93 Difference]: Finished difference Result 84 states and 220 transitions. [2019-01-18 17:40:33,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:40:33,376 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:40:33,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:33,377 INFO L225 Difference]: With dead ends: 84 [2019-01-18 17:40:33,377 INFO L226 Difference]: Without dead ends: 82 [2019-01-18 17:40:33,378 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:40:33,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-01-18 17:40:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2019-01-18 17:40:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-18 17:40:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-18 17:40:33,390 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-18 17:40:33,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:33,390 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-18 17:40:33,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:33,390 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-18 17:40:33,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:40:33,391 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:33,391 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:40:33,391 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:33,392 INFO L82 PathProgramCache]: Analyzing trace with hash 954618, now seen corresponding path program 1 times [2019-01-18 17:40:33,392 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:33,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:33,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:33,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:33,393 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:33,659 WARN L181 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-18 17:40:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:33,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:33,675 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:33,675 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:40:33,675 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [35] [2019-01-18 17:40:33,677 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:33,677 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:33,682 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:33,682 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. [2019-01-18 17:40:33,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:33,683 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:33,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:33,683 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:33,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:33,692 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:33,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:33,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:33,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 17:40:33,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,810 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 17:40:33,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 17:40:33,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:33,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 17:40:34,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,100 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 17:40:34,231 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-18 17:40:34,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 17:40:34,415 WARN L181 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 17:40:34,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,436 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 17:40:34,437 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,517 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,595 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,683 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,767 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,852 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,934 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:40:35,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:40:35,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:40:35,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:40:35,064 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:40:35,069 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:40:35,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:40:35,079 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 17:40:35,079 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,184 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,242 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,286 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,320 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,346 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,369 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,389 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,515 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:35,516 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-18 17:40:35,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 17:40:35,584 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,711 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:35,712 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-18 17:40:35,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,972 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:35,973 INFO L303 Elim1Store]: Index analysis took 227 ms [2019-01-18 17:40:35,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-18 17:40:35,976 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:36,242 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:36,243 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-18 17:40:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:36,324 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:36,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:36,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:40:36,372 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:36,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:36,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:36,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:36,373 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-18 17:40:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:40,301 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-18 17:40:40,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:40:40,302 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:40:40,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:40,303 INFO L225 Difference]: With dead ends: 81 [2019-01-18 17:40:40,303 INFO L226 Difference]: Without dead ends: 80 [2019-01-18 17:40:40,304 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:40:40,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-18 17:40:40,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2019-01-18 17:40:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-18 17:40:40,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-18 17:40:40,313 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-18 17:40:40,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:40,313 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-18 17:40:40,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:40,314 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-18 17:40:40,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:40:40,314 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:40,314 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:40:40,315 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:40,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:40,315 INFO L82 PathProgramCache]: Analyzing trace with hash 955114, now seen corresponding path program 1 times [2019-01-18 17:40:40,315 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:40,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:40,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:40,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:40,316 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:40,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:40,450 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:40,450 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:40:40,451 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [35] [2019-01-18 17:40:40,452 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:40,452 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:40,456 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:40,458 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. [2019-01-18 17:40:40,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:40,458 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:40,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:40,458 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:40,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:40,469 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:40,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:40,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,524 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 17:40:40,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,591 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 17:40:40,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 17:40:40,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,780 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 17:40:40,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:40,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 17:40:41,031 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-18 17:40:41,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,059 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 17:40:41,227 WARN L181 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 17:40:41,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,255 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 17:40:41,256 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,380 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,471 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,569 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,665 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,760 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,863 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:40:41,975 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:40:41,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:40:41,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:40:41,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:40:41,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:40:41,999 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:40:42,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 17:40:42,005 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:42,112 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:42,169 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:42,212 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:42,245 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:42,269 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:42,290 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:42,310 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:42,434 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:42,434 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-18 17:40:42,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,505 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 17:40:42,505 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:42,633 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:42,634 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-18 17:40:42,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,689 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:42,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-18 17:40:42,692 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:42,820 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:42,821 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-18 17:40:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:42,978 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:43,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:43,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:40:43,027 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:43,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:43,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:43,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:43,028 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-18 17:40:44,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:44,506 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-18 17:40:44,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:40:44,507 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:40:44,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:44,508 INFO L225 Difference]: With dead ends: 81 [2019-01-18 17:40:44,508 INFO L226 Difference]: Without dead ends: 79 [2019-01-18 17:40:44,509 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:40:44,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-01-18 17:40:44,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2019-01-18 17:40:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-01-18 17:40:44,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 175 transitions. [2019-01-18 17:40:44,520 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 175 transitions. Word has length 4 [2019-01-18 17:40:44,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:44,520 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 175 transitions. [2019-01-18 17:40:44,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:44,520 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 175 transitions. [2019-01-18 17:40:44,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:40:44,521 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:44,521 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:40:44,522 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:44,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:44,522 INFO L82 PathProgramCache]: Analyzing trace with hash 954742, now seen corresponding path program 1 times [2019-01-18 17:40:44,522 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:44,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:44,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:44,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:44,523 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:44,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:44,750 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:44,750 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:40:44,750 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [35] [2019-01-18 17:40:44,754 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:44,754 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:44,758 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:44,758 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. [2019-01-18 17:40:44,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:44,759 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:44,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:44,759 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:44,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:44,767 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:44,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:44,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:40:44,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:40:44,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,853 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:40:44,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:40:44,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:40:44,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:40:44,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:40:44,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,077 INFO L303 Elim1Store]: Index analysis took 164 ms [2019-01-18 17:40:45,078 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 17:40:45,079 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:45,934 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:45,998 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,047 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,083 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,113 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,137 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,160 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 17:40:46,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 17:40:46,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 17:40:46,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 17:40:46,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,567 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 17:40:46,695 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-18 17:40:46,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,714 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 17:40:46,880 WARN L181 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 17:40:46,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 17:40:46,900 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,978 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,054 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,133 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,214 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,294 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,386 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,511 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:47,512 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-18 17:40:47,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,557 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 17:40:47,558 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,685 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:47,685 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-18 17:40:47,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-18 17:40:47,787 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:47,922 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:47,923 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-18 17:40:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:48,007 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:48,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:48,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:40:48,062 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:48,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:48,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:48,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:40:48,063 INFO L87 Difference]: Start difference. First operand 44 states and 175 transitions. Second operand 8 states. [2019-01-18 17:40:51,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:51,647 INFO L93 Difference]: Finished difference Result 99 states and 274 transitions. [2019-01-18 17:40:51,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:40:51,648 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:40:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:51,650 INFO L225 Difference]: With dead ends: 99 [2019-01-18 17:40:51,650 INFO L226 Difference]: Without dead ends: 95 [2019-01-18 17:40:51,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:40:51,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-01-18 17:40:51,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2019-01-18 17:40:51,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-01-18 17:40:51,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 210 transitions. [2019-01-18 17:40:51,663 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 210 transitions. Word has length 4 [2019-01-18 17:40:51,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:51,663 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 210 transitions. [2019-01-18 17:40:51,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:51,664 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 210 transitions. [2019-01-18 17:40:51,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:40:51,664 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:51,664 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:40:51,665 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:51,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:51,665 INFO L82 PathProgramCache]: Analyzing trace with hash 941536, now seen corresponding path program 1 times [2019-01-18 17:40:51,665 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:51,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:51,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:51,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:51,666 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:51,978 WARN L181 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-18 17:40:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:52,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:52,188 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:52,188 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:40:52,189 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [35] [2019-01-18 17:40:52,190 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:52,190 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:52,195 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:52,195 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. [2019-01-18 17:40:52,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:52,195 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:52,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:52,196 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:52,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:52,220 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:52,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:52,347 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-18 17:40:52,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:40:52,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:40:52,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:40:52,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,372 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:40:52,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,396 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:40:52,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:40:52,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,465 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:40:52,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 17:40:52,483 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:52,566 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:52,626 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:52,673 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:52,710 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:52,759 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:52,783 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:52,805 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:52,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:40:52,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,921 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 17:40:52,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:52,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 17:40:53,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 17:40:53,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,159 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:40:53,276 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 17:40:53,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:40:53,295 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:53,348 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:53,403 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:53,459 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:53,514 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:53,574 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:53,666 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:53,666 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 17:40:53,844 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2019-01-18 17:40:53,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-18 17:40:53,851 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:53,936 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:53,937 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 17:40:53,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 134 [2019-01-18 17:40:53,980 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:54,068 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:54,069 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-18 17:40:54,288 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2019-01-18 17:40:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:54,289 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:54,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:54,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:40:54,762 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:54,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:54,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:54,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:54,767 INFO L87 Difference]: Start difference. First operand 52 states and 210 transitions. Second operand 8 states. [2019-01-18 17:40:55,346 WARN L181 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-01-18 17:40:56,455 WARN L181 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2019-01-18 17:40:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:56,884 INFO L93 Difference]: Finished difference Result 101 states and 289 transitions. [2019-01-18 17:40:56,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:40:56,885 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:40:56,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:56,886 INFO L225 Difference]: With dead ends: 101 [2019-01-18 17:40:56,887 INFO L226 Difference]: Without dead ends: 99 [2019-01-18 17:40:56,887 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:40:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-18 17:40:56,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2019-01-18 17:40:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-18 17:40:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 243 transitions. [2019-01-18 17:40:56,903 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 243 transitions. Word has length 4 [2019-01-18 17:40:56,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:56,903 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 243 transitions. [2019-01-18 17:40:56,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 243 transitions. [2019-01-18 17:40:56,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:40:56,904 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:56,904 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:40:56,904 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:56,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash 941164, now seen corresponding path program 1 times [2019-01-18 17:40:56,905 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:56,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:56,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:56,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:56,905 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:57,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:57,029 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:57,029 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:40:57,029 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [35] [2019-01-18 17:40:57,030 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:57,030 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:57,034 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:57,034 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. [2019-01-18 17:40:57,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:57,034 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:57,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:57,034 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:57,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:57,048 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:57,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:57,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,084 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:40:57,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 17:40:57,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 17:40:57,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,279 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 [2019-01-18 17:40:57,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,382 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:40:57,505 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 17:40:57,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:40:57,528 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:57,584 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:57,640 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:57,696 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:57,753 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:57,809 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:57,878 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:40:57,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:40:57,887 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:40:57,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:40:57,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:40:57,916 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:40:57,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:40:57,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 17:40:57,986 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,061 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,119 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,162 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,193 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,219 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,241 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,262 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,358 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:58,358 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 17:40:58,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-18 17:40:58,425 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,511 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:58,511 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 17:40:58,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:58,550 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:58,551 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-18 17:40:58,552 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:58,643 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:58,643 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-18 17:40:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:58,672 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:58,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:58,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:40:58,722 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:58,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:58,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:58,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:58,722 INFO L87 Difference]: Start difference. First operand 59 states and 243 transitions. Second operand 8 states. [2019-01-18 17:40:59,498 WARN L181 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-01-18 17:41:00,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:00,001 INFO L93 Difference]: Finished difference Result 99 states and 302 transitions. [2019-01-18 17:41:00,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:41:00,002 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:41:00,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:00,003 INFO L225 Difference]: With dead ends: 99 [2019-01-18 17:41:00,003 INFO L226 Difference]: Without dead ends: 98 [2019-01-18 17:41:00,003 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:41:00,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-18 17:41:00,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2019-01-18 17:41:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-01-18 17:41:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 261 transitions. [2019-01-18 17:41:00,016 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 261 transitions. Word has length 4 [2019-01-18 17:41:00,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:00,016 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 261 transitions. [2019-01-18 17:41:00,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:00,017 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 261 transitions. [2019-01-18 17:41:00,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:41:00,017 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:00,017 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:41:00,018 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:00,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:00,018 INFO L82 PathProgramCache]: Analyzing trace with hash 941660, now seen corresponding path program 1 times [2019-01-18 17:41:00,018 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:00,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:00,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:00,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:00,019 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:00,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:00,087 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:00,087 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:41:00,087 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [35] [2019-01-18 17:41:00,090 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:00,090 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:00,095 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:00,095 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. [2019-01-18 17:41:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:00,096 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:00,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:00,096 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:00,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:00,106 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:00,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:00,149 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:41:00,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:41:00,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:41:00,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:41:00,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:41:00,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:41:00,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:41:00,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 17:41:00,268 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,350 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,412 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,459 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,496 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,525 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,550 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,636 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:41:00,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 17:41:00,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,806 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 17:41:00,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 17:41:00,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:41:01,084 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 17:41:01,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,101 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:41:01,102 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:01,177 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:01,227 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:01,274 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:01,326 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:01,380 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:01,471 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:01,471 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 17:41:01,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,528 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-18 17:41:01,529 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:01,612 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:01,613 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 17:41:01,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,661 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:01,663 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-18 17:41:01,664 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:01,752 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:01,753 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-18 17:41:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:01,878 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:01,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:01,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:41:01,923 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:01,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:01,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:01,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:41:01,923 INFO L87 Difference]: Start difference. First operand 61 states and 261 transitions. Second operand 8 states. [2019-01-18 17:41:02,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:02,560 INFO L93 Difference]: Finished difference Result 101 states and 320 transitions. [2019-01-18 17:41:02,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:41:02,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:41:02,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:02,562 INFO L225 Difference]: With dead ends: 101 [2019-01-18 17:41:02,562 INFO L226 Difference]: Without dead ends: 99 [2019-01-18 17:41:02,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:41:02,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-18 17:41:02,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2019-01-18 17:41:02,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-01-18 17:41:02,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 278 transitions. [2019-01-18 17:41:02,578 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 278 transitions. Word has length 4 [2019-01-18 17:41:02,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:02,579 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 278 transitions. [2019-01-18 17:41:02,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:02,579 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 278 transitions. [2019-01-18 17:41:02,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:41:02,580 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:02,580 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:41:02,580 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:02,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:02,580 INFO L82 PathProgramCache]: Analyzing trace with hash 941288, now seen corresponding path program 1 times [2019-01-18 17:41:02,580 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:02,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:02,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:02,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:02,581 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:02,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:02,666 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:02,666 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:41:02,666 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [35] [2019-01-18 17:41:02,668 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:02,668 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:02,672 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:02,672 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. [2019-01-18 17:41:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:02,672 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:02,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:02,672 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:02,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:02,685 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:02,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:02,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,764 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:41:02,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 17:41:02,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,880 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 [2019-01-18 17:41:02,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,961 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 17:41:03,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,130 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:41:03,272 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 17:41:03,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:41:03,290 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,345 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,399 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,454 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,509 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,564 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,634 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:41:03,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:41:03,641 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:41:03,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:41:03,657 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:41:03,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:41:03,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:41:03,689 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 17:41:03,690 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,768 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,825 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,866 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,899 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,925 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,947 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,967 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:04,061 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:04,061 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 17:41:04,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-18 17:41:04,120 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:04,206 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:04,206 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 17:41:04,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:04,247 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-18 17:41:04,248 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:04,343 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:04,344 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-18 17:41:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:04,368 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:04,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:04,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:41:04,418 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:04,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:04,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:04,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:41:04,418 INFO L87 Difference]: Start difference. First operand 62 states and 278 transitions. Second operand 8 states. [2019-01-18 17:41:05,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:05,152 INFO L93 Difference]: Finished difference Result 106 states and 350 transitions. [2019-01-18 17:41:05,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:41:05,153 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:41:05,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:05,155 INFO L225 Difference]: With dead ends: 106 [2019-01-18 17:41:05,155 INFO L226 Difference]: Without dead ends: 104 [2019-01-18 17:41:05,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:41:05,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-01-18 17:41:05,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2019-01-18 17:41:05,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-01-18 17:41:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 304 transitions. [2019-01-18 17:41:05,171 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 304 transitions. Word has length 4 [2019-01-18 17:41:05,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:05,171 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 304 transitions. [2019-01-18 17:41:05,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 304 transitions. [2019-01-18 17:41:05,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:41:05,172 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:05,172 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:41:05,172 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:05,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:05,172 INFO L82 PathProgramCache]: Analyzing trace with hash 941784, now seen corresponding path program 1 times [2019-01-18 17:41:05,173 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:05,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:05,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:05,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:05,174 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:05,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:05,284 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:05,284 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:41:05,284 INFO L207 CegarAbsIntRunner]: [0], [18], [30], [35] [2019-01-18 17:41:05,285 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:05,285 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:05,289 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:05,289 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:41:05,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:05,289 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:05,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:05,290 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:05,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:05,302 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:05,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:05,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:41:05,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:41:05,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:41:05,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:41:05,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:41:05,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,387 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:41:05,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,400 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:41:05,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 17:41:05,414 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,496 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,558 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,605 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,642 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,672 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,695 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,717 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:05,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,774 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:41:05,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 17:41:05,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 17:41:05,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:05,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 17:41:06,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:41:06,194 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 17:41:06,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:41:06,212 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,264 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,316 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,368 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,424 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,477 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,588 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. [2019-01-18 17:41:06,588 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 17:41:06,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,647 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-18 17:41:06,647 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,731 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:06,732 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 17:41:06,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-18 17:41:06,793 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,886 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:06,886 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-18 17:41:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:06,921 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:06,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:06,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:41:06,969 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:06,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:06,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:06,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:41:06,970 INFO L87 Difference]: Start difference. First operand 65 states and 304 transitions. Second operand 8 states. [2019-01-18 17:41:07,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:07,737 INFO L93 Difference]: Finished difference Result 107 states and 376 transitions. [2019-01-18 17:41:07,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:41:07,738 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:41:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:07,740 INFO L225 Difference]: With dead ends: 107 [2019-01-18 17:41:07,740 INFO L226 Difference]: Without dead ends: 99 [2019-01-18 17:41:07,740 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:41:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-18 17:41:07,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-01-18 17:41:07,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-01-18 17:41:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 328 transitions. [2019-01-18 17:41:07,754 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 328 transitions. Word has length 4 [2019-01-18 17:41:07,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:07,754 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 328 transitions. [2019-01-18 17:41:07,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 328 transitions. [2019-01-18 17:41:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:41:07,755 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:07,755 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:41:07,756 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:07,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:07,756 INFO L82 PathProgramCache]: Analyzing trace with hash 930314, now seen corresponding path program 1 times [2019-01-18 17:41:07,756 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:07,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:07,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:07,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:07,757 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:07,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:07,888 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:07,888 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:41:07,889 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [35] [2019-01-18 17:41:07,890 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:07,890 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:07,893 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:07,893 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. [2019-01-18 17:41:07,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:07,894 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:07,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:07,894 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:07,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:07,904 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:07,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:07,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:41:07,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 17:41:08,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,057 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 17:41:08,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 17:41:08,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:41:08,353 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 17:41:08,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:41:08,370 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,430 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,486 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,543 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,599 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,655 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:41:08,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:41:08,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:41:08,732 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:41:08,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:41:08,741 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:41:08,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:41:08,756 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 17:41:08,757 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,844 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,962 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:09,053 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:09,086 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:09,112 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:09,134 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:09,154 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:09,246 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:09,247 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-18 17:41:09,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 135 [2019-01-18 17:41:09,295 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:41:09,612 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 12 dim-0 vars, and 2 xjuncts. [2019-01-18 17:41:09,613 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:201 [2019-01-18 17:41:09,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,810 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 12 case distinctions, treesize of input 111 treesize of output 165 [2019-01-18 17:41:09,810 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-01-18 17:41:09,826 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2019-01-18 17:41:11,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:11,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:11,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:11,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:11,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:11,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:11,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:11,225 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:11,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 126 [2019-01-18 17:41:11,227 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:11,739 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 2 dim-1 vars, End of recursive call: 49 dim-0 vars, and 8 xjuncts. [2019-01-18 17:41:11,739 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:218, output treesize:686 [2019-01-18 17:41:12,640 WARN L181 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 114 [2019-01-18 17:41:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:12,642 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:12,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:12,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-01-18 17:41:12,671 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:12,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:12,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:12,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:41:12,671 INFO L87 Difference]: Start difference. First operand 66 states and 328 transitions. Second operand 8 states. [2019-01-18 17:41:13,711 WARN L181 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 117 [2019-01-18 17:41:16,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:16,904 INFO L93 Difference]: Finished difference Result 155 states and 556 transitions. [2019-01-18 17:41:16,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 17:41:16,904 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:41:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:16,907 INFO L225 Difference]: With dead ends: 155 [2019-01-18 17:41:16,907 INFO L226 Difference]: Without dead ends: 152 [2019-01-18 17:41:16,907 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 [2019-01-18 17:41:16,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-01-18 17:41:16,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2019-01-18 17:41:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-01-18 17:41:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 438 transitions. [2019-01-18 17:41:16,923 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 438 transitions. Word has length 4 [2019-01-18 17:41:16,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:16,923 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 438 transitions. [2019-01-18 17:41:16,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:16,923 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 438 transitions. [2019-01-18 17:41:16,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:41:16,924 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:16,924 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:41:16,924 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:16,925 INFO L82 PathProgramCache]: Analyzing trace with hash 930440, now seen corresponding path program 1 times [2019-01-18 17:41:16,925 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:16,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:16,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:16,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:16,926 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:17,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:17,115 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:17,115 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:41:17,115 INFO L207 CegarAbsIntRunner]: [0], [6], [36], [37] [2019-01-18 17:41:17,116 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:17,116 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:17,119 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:17,119 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. [2019-01-18 17:41:17,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:17,119 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:17,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:17,120 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:17,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:17,135 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:17,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:17,345 WARN L181 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-18 17:41:17,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:41:17,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:41:17,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:41:17,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:41:17,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:41:17,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:41:17,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,416 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:41:17,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 17:41:17,432 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,514 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,576 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,624 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,659 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,688 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,711 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,733 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,790 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:41:17,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,847 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 17:41:17,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 17:41:17,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:17,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 17:41:18,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:41:18,206 WARN L181 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 17:41:18,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:41:18,223 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,281 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,334 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,388 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,443 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,498 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,592 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:18,592 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-18 17:41:18,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 17:41:18,633 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,721 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:18,722 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-18 17:41:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:18,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:18,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:18,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:41:18,774 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:18,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:41:18,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:41:18,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:41:18,775 INFO L87 Difference]: Start difference. First operand 78 states and 438 transitions. Second operand 6 states. [2019-01-18 17:41:19,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:19,141 INFO L93 Difference]: Finished difference Result 104 states and 471 transitions. [2019-01-18 17:41:19,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:41:19,142 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-18 17:41:19,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:19,144 INFO L225 Difference]: With dead ends: 104 [2019-01-18 17:41:19,144 INFO L226 Difference]: Without dead ends: 103 [2019-01-18 17:41:19,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:41:19,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-01-18 17:41:19,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2019-01-18 17:41:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-18 17:41:19,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-18 17:41:19,162 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-18 17:41:19,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:19,162 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-18 17:41:19,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:41:19,162 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-18 17:41:19,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:41:19,163 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:19,163 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:41:19,163 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:19,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:19,164 INFO L82 PathProgramCache]: Analyzing trace with hash 945816, now seen corresponding path program 1 times [2019-01-18 17:41:19,164 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:19,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:19,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:19,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:19,165 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:19,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:19,195 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:19,195 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:41:19,195 INFO L207 CegarAbsIntRunner]: [0], [22], [36], [37] [2019-01-18 17:41:19,197 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:19,197 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:19,200 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:19,200 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. [2019-01-18 17:41:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:19,201 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:19,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:19,201 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:19,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:19,214 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:19,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:19,238 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:41:19,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-18 17:41:19,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-18 17:41:19,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-18 17:41:19,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-18 17:41:19,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-18 17:41:19,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-18 17:41:19,322 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-18 17:41:19,323 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,402 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,461 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,505 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,539 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,566 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,589 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,610 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,657 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-18 17:41:19,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-18 17:41:19,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-18 17:41:19,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-18 17:41:19,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,917 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-18 17:41:20,023 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2019-01-18 17:41:20,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:20,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:20,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:20,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:20,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:20,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:20,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:20,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:20,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:20,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:20,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-18 17:41:20,041 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:20,092 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:20,143 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:20,193 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:20,245 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:20,300 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:20,387 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:20,388 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-18 17:41:20,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:20,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-18 17:41:20,426 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:20,512 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:20,512 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-18 17:41:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:20,535 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:20,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:20,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:41:20,566 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:20,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:41:20,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:41:20,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:41:20,567 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 6 states. [2019-01-18 17:41:20,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:20,927 INFO L93 Difference]: Finished difference Result 108 states and 483 transitions. [2019-01-18 17:41:20,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:41:20,927 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-18 17:41:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:20,929 INFO L225 Difference]: With dead ends: 108 [2019-01-18 17:41:20,929 INFO L226 Difference]: Without dead ends: 107 [2019-01-18 17:41:20,929 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:41:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-01-18 17:41:20,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2019-01-18 17:41:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-18 17:41:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-18 17:41:20,944 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-18 17:41:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:20,945 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-18 17:41:20,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:41:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-18 17:41:20,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:41:20,945 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:20,945 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:41:20,946 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:20,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:20,946 INFO L82 PathProgramCache]: Analyzing trace with hash 945008, now seen corresponding path program 1 times [2019-01-18 17:41:20,946 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:20,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:20,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:20,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:20,947 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:21,128 WARN L181 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2019-01-18 17:41:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:21,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:21,162 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:21,162 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:41:21,162 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [35] [2019-01-18 17:41:21,164 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:21,164 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:21,167 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:21,167 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. [2019-01-18 17:41:21,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:21,167 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:21,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:21,168 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:21,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:21,177 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:21,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:21,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:41:21,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,269 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 17:41:21,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 17:41:21,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 17:41:21,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,516 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:41:21,629 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 17:41:21,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:41:21,647 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:21,704 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:21,758 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:21,814 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:21,871 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:21,930 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:21,999 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:41:22,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:41:22,005 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:41:22,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:41:22,011 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:41:22,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:41:22,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:41:22,045 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 17:41:22,046 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,120 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,183 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,225 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,257 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,281 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,302 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,322 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,415 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:22,416 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 17:41:22,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,475 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 17:41:22,475 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,563 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:22,564 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 17:41:22,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,814 INFO L303 Elim1Store]: Index analysis took 218 ms [2019-01-18 17:41:22,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-18 17:41:22,815 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:23,006 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:23,006 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-18 17:41:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:23,035 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:23,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:23,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:41:23,088 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:23,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:23,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:23,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:41:23,089 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 8 states. [2019-01-18 17:41:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:24,759 INFO L93 Difference]: Finished difference Result 154 states and 652 transitions. [2019-01-18 17:41:24,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:41:24,763 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:41:24,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:24,766 INFO L225 Difference]: With dead ends: 154 [2019-01-18 17:41:24,766 INFO L226 Difference]: Without dead ends: 153 [2019-01-18 17:41:24,767 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:41:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-01-18 17:41:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2019-01-18 17:41:24,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-01-18 17:41:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 556 transitions. [2019-01-18 17:41:24,788 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 556 transitions. Word has length 4 [2019-01-18 17:41:24,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:24,788 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 556 transitions. [2019-01-18 17:41:24,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:24,789 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 556 transitions. [2019-01-18 17:41:24,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:41:24,789 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:24,789 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:41:24,790 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:24,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:24,790 INFO L82 PathProgramCache]: Analyzing trace with hash 945504, now seen corresponding path program 1 times [2019-01-18 17:41:24,790 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:24,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:24,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:24,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:24,791 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:24,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:24,979 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:24,979 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:41:24,979 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [35] [2019-01-18 17:41:24,980 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:24,980 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:24,983 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:24,983 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. [2019-01-18 17:41:24,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:24,984 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:24,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:24,984 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:25,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:25,003 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:25,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:25,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:41:25,047 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:41:25,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:41:25,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:41:25,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,070 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:41:25,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:41:25,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,094 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:41:25,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 17:41:25,108 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,188 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,255 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,301 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,335 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,363 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,387 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,408 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,461 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:41:25,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,514 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 17:41:25,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,576 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 17:41:25,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 17:41:25,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:41:25,860 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 17:41:25,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:25,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:41:25,878 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,931 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:25,984 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:26,035 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:26,087 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:26,140 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:26,230 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:26,230 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 17:41:26,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,288 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 17:41:26,289 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:26,376 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:26,377 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 17:41:26,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:26,416 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-18 17:41:26,416 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:26,510 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:26,511 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-18 17:41:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:26,534 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:26,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:26,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:41:26,591 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:26,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:26,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:26,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:41:26,592 INFO L87 Difference]: Start difference. First operand 92 states and 556 transitions. Second operand 8 states. [2019-01-18 17:41:27,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:27,364 INFO L93 Difference]: Finished difference Result 148 states and 688 transitions. [2019-01-18 17:41:27,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:41:27,365 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:41:27,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:27,367 INFO L225 Difference]: With dead ends: 148 [2019-01-18 17:41:27,367 INFO L226 Difference]: Without dead ends: 146 [2019-01-18 17:41:27,368 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:41:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-01-18 17:41:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-01-18 17:41:27,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-01-18 17:41:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 590 transitions. [2019-01-18 17:41:27,389 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 590 transitions. Word has length 4 [2019-01-18 17:41:27,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:27,389 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 590 transitions. [2019-01-18 17:41:27,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:27,389 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 590 transitions. [2019-01-18 17:41:27,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:41:27,390 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:27,390 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:41:27,390 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:27,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:27,390 INFO L82 PathProgramCache]: Analyzing trace with hash 933972, now seen corresponding path program 1 times [2019-01-18 17:41:27,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:27,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:27,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:27,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:27,392 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:27,589 WARN L181 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2019-01-18 17:41:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:27,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:27,616 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:27,616 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:41:27,616 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [35] [2019-01-18 17:41:27,617 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:27,617 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:27,621 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:27,621 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. [2019-01-18 17:41:27,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:27,622 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:27,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:27,622 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:27,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:27,631 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:27,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:27,675 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:41:27,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:41:27,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:41:27,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:41:27,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:41:27,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:41:27,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:41:27,751 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 [2019-01-18 17:41:27,752 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,833 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,896 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,943 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,981 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:28,011 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:28,035 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:28,057 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:28,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:41:28,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 17:41:28,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,234 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 17:41:28,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 17:41:28,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,416 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:41:28,527 WARN L181 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 17:41:28,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,543 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:41:28,544 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:28,598 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:28,651 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:28,703 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:28,758 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:28,812 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:28,905 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:28,906 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 17:41:28,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 17:41:28,968 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:29,058 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:29,058 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 17:41:29,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,095 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:29,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 141 [2019-01-18 17:41:29,097 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:29,189 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:29,190 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:82 [2019-01-18 17:41:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:29,213 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:29,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:29,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:41:29,260 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:29,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:29,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:29,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:41:29,261 INFO L87 Difference]: Start difference. First operand 103 states and 590 transitions. Second operand 8 states. [2019-01-18 17:41:29,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:29,783 INFO L93 Difference]: Finished difference Result 145 states and 646 transitions. [2019-01-18 17:41:29,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:41:29,783 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:41:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:29,786 INFO L225 Difference]: With dead ends: 145 [2019-01-18 17:41:29,786 INFO L226 Difference]: Without dead ends: 143 [2019-01-18 17:41:29,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:41:29,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-01-18 17:41:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2019-01-18 17:41:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-18 17:41:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 599 transitions. [2019-01-18 17:41:29,806 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 599 transitions. Word has length 4 [2019-01-18 17:41:29,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:29,807 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 599 transitions. [2019-01-18 17:41:29,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:29,807 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 599 transitions. [2019-01-18 17:41:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:41:29,807 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:29,808 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:41:29,808 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:29,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:29,808 INFO L82 PathProgramCache]: Analyzing trace with hash 938128, now seen corresponding path program 1 times [2019-01-18 17:41:29,808 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:29,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:29,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:29,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:29,809 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:29,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:29,866 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:29,866 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:41:29,866 INFO L207 CegarAbsIntRunner]: [0], [14], [36], [37] [2019-01-18 17:41:29,867 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:29,867 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:29,871 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:29,871 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. [2019-01-18 17:41:29,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:29,871 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:29,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:29,872 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:29,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:29,880 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:29,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:29,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:41:29,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-18 17:41:29,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,902 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-18 17:41:29,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,912 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-18 17:41:29,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-18 17:41:29,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-18 17:41:29,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:29,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-18 17:41:29,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-18 17:41:29,964 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,042 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,102 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,145 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,179 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,206 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,227 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,250 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-18 17:41:30,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,322 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 73 treesize of output 80 [2019-01-18 17:41:30,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-18 17:41:30,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-18 17:41:30,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,558 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-18 17:41:30,666 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2019-01-18 17:41:30,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,683 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-18 17:41:30,684 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,734 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,784 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,835 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,886 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,941 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:31,028 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:31,029 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-18 17:41:31,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:31,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-18 17:41:31,140 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:31,318 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:31,319 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-18 17:41:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:31,366 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:31,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:31,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:41:31,399 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:31,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:41:31,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:41:31,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:41:31,400 INFO L87 Difference]: Start difference. First operand 104 states and 599 transitions. Second operand 6 states. [2019-01-18 17:41:31,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:31,870 INFO L93 Difference]: Finished difference Result 124 states and 613 transitions. [2019-01-18 17:41:31,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:41:31,870 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-18 17:41:31,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:31,872 INFO L225 Difference]: With dead ends: 124 [2019-01-18 17:41:31,872 INFO L226 Difference]: Without dead ends: 123 [2019-01-18 17:41:31,873 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:41:31,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-01-18 17:41:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2019-01-18 17:41:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-18 17:41:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-01-18 17:41:31,889 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 4 [2019-01-18 17:41:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:31,889 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-01-18 17:41:31,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:41:31,889 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-01-18 17:41:31,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:41:31,890 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:31,890 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:41:31,890 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:31,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:31,891 INFO L82 PathProgramCache]: Analyzing trace with hash 937816, now seen corresponding path program 1 times [2019-01-18 17:41:31,891 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:31,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:31,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:31,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:31,891 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:32,081 WARN L181 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-01-18 17:41:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:32,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:32,117 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:32,117 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:41:32,118 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [35] [2019-01-18 17:41:32,119 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:32,119 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:32,121 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:32,121 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. [2019-01-18 17:41:32,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:32,122 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:32,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:32,122 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:32,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:32,134 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:32,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:32,394 WARN L181 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-18 17:41:32,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:41:32,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:41:32,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,447 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:41:32,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:41:32,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,466 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:41:32,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:41:32,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:41:32,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 17:41:32,507 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:32,587 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:32,658 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:32,705 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:32,742 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:32,771 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:32,795 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:32,818 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:32,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:41:32,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-18 17:41:32,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:32,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 17:41:33,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 17:41:33,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,172 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:41:33,286 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 17:41:33,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:41:33,302 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,354 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,406 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,460 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,513 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,566 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,657 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:33,658 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 17:41:33,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,768 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-18 17:41:33,769 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,864 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:33,864 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-18 17:41:33,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,020 INFO L303 Elim1Store]: Index analysis took 124 ms [2019-01-18 17:41:34,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-18 17:41:34,022 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,395 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:34,395 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-18 17:41:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:34,423 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:34,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:34,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:41:34,477 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:34,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:34,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:34,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:41:34,478 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 8 states. [2019-01-18 17:41:35,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:35,440 INFO L93 Difference]: Finished difference Result 176 states and 800 transitions. [2019-01-18 17:41:35,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:41:35,441 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:41:35,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:35,443 INFO L225 Difference]: With dead ends: 176 [2019-01-18 17:41:35,444 INFO L226 Difference]: Without dead ends: 174 [2019-01-18 17:41:35,444 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-01-18 17:41:35,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-01-18 17:41:35,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2019-01-18 17:41:35,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-18 17:41:35,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-18 17:41:35,463 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-18 17:41:35,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:35,463 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-18 17:41:35,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:35,463 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-18 17:41:35,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:41:35,464 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:35,464 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:41:35,464 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:35,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:35,464 INFO L82 PathProgramCache]: Analyzing trace with hash 953504, now seen corresponding path program 1 times [2019-01-18 17:41:35,464 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:35,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:35,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:35,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:35,465 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:35,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:35,583 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:35,583 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:41:35,583 INFO L207 CegarAbsIntRunner]: [0], [30], [36], [37] [2019-01-18 17:41:35,584 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:35,584 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:35,586 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:35,586 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. [2019-01-18 17:41:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:35,586 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:35,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:35,587 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:35,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:35,596 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:35,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:35,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-18 17:41:35,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-18 17:41:35,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-18 17:41:35,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,764 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-18 17:41:35,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-18 17:41:35,970 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2019-01-18 17:41:35,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:35,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-18 17:41:35,988 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,041 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,092 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,145 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,198 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,252 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:41:36,324 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-18 17:41:36,330 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-18 17:41:36,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-18 17:41:36,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-18 17:41:36,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-18 17:41:36,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-18 17:41:36,366 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-18 17:41:36,367 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,438 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,491 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,531 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,562 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,585 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,605 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,625 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,714 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:36,715 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-18 17:41:36,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-18 17:41:36,758 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,846 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:36,847 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-18 17:41:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:36,896 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:36,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:36,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:41:36,927 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:36,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:41:36,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:41:36,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:41:36,928 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 6 states. [2019-01-18 17:41:37,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:37,254 INFO L93 Difference]: Finished difference Result 135 states and 696 transitions. [2019-01-18 17:41:37,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:41:37,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-18 17:41:37,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:37,257 INFO L225 Difference]: With dead ends: 135 [2019-01-18 17:41:37,257 INFO L226 Difference]: Without dead ends: 134 [2019-01-18 17:41:37,258 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:41:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-01-18 17:41:37,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2019-01-18 17:41:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-18 17:41:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-18 17:41:37,282 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-18 17:41:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:37,282 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-18 17:41:37,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:41:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-18 17:41:37,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:37,283 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:37,283 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:37,283 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:37,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:37,283 INFO L82 PathProgramCache]: Analyzing trace with hash 29600478, now seen corresponding path program 1 times [2019-01-18 17:41:37,283 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:37,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:37,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:37,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:37,284 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:37,449 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2019-01-18 17:41:37,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:37,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:37,570 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:37,570 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:37,570 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [35] [2019-01-18 17:41:37,571 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:37,571 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:37,574 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:37,574 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. [2019-01-18 17:41:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:37,574 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:37,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:37,574 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:37,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:37,583 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:37,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:37,718 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-18 17:41:37,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:41:37,724 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:41:37,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,731 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:41:37,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:41:37,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:41:37,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,768 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:41:37,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:41:37,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 17:41:37,797 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:37,910 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:37,974 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:38,023 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:38,061 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:38,091 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:38,115 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:38,137 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:38,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 17:41:38,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 17:41:38,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,341 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 17:41:38,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 17:41:38,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,543 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 17:41:38,673 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-18 17:41:38,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 17:41:38,853 WARN L181 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 17:41:38,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 17:41:38,872 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:38,950 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:39,031 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:39,106 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:39,183 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:39,258 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:39,337 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:39,463 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:39,463 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-18 17:41:39,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,509 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 17:41:39,510 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:39,644 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:39,645 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-18 17:41:39,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,691 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:39,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-18 17:41:39,693 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:39,824 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:39,824 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-18 17:41:39,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:39,887 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 169 [2019-01-18 17:41:39,888 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:40,011 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:40,011 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:89 [2019-01-18 17:41:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:40,044 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:40,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:40,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:41:40,102 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:40,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:41:40,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:41:40,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:41:40,102 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 10 states. [2019-01-18 17:41:41,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:41,246 INFO L93 Difference]: Finished difference Result 212 states and 968 transitions. [2019-01-18 17:41:41,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 17:41:41,247 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:41:41,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:41,249 INFO L225 Difference]: With dead ends: 212 [2019-01-18 17:41:41,250 INFO L226 Difference]: Without dead ends: 205 [2019-01-18 17:41:41,250 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:41:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-01-18 17:41:41,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2019-01-18 17:41:41,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-01-18 17:41:41,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 789 transitions. [2019-01-18 17:41:41,283 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 789 transitions. Word has length 5 [2019-01-18 17:41:41,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:41,284 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 789 transitions. [2019-01-18 17:41:41,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:41:41,284 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 789 transitions. [2019-01-18 17:41:41,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:41,284 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:41,285 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:41,285 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:41,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:41,285 INFO L82 PathProgramCache]: Analyzing trace with hash 29600106, now seen corresponding path program 1 times [2019-01-18 17:41:41,285 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:41,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:41,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:41,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:41,286 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:41,529 WARN L181 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-01-18 17:41:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:41,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:41,569 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:41,570 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:41,570 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [35] [2019-01-18 17:41:41,571 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:41,571 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:41,573 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:41,573 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. [2019-01-18 17:41:41,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:41,574 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:41,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:41,574 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:41,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:41,584 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:41,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:41,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,634 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 17:41:41,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,706 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 17:41:41,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 17:41:41,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 17:41:41,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:41,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 17:41:42,135 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-18 17:41:42,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 17:41:42,334 WARN L181 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 17:41:42,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 17:41:42,362 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:42,453 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:42,550 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:42,645 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:42,740 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:42,842 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:42,939 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:43,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:41:43,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:41:43,058 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:41:43,060 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:41:43,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:41:43,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:41:43,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:41:43,076 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 17:41:43,077 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:43,187 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:43,246 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:43,290 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:43,323 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:43,347 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:43,369 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:43,387 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:43,513 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:43,513 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-18 17:41:43,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,557 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 17:41:43,557 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:43,681 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:43,681 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-18 17:41:43,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,733 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:43,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-18 17:41:43,735 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:43,865 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:43,866 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-18 17:41:43,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,918 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:43,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-18 17:41:43,920 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:44,049 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:44,050 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-18 17:41:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:44,121 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:44,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:44,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:41:44,194 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:44,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:41:44,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:41:44,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:41:44,195 INFO L87 Difference]: Start difference. First operand 122 states and 789 transitions. Second operand 10 states. [2019-01-18 17:41:46,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:46,502 INFO L93 Difference]: Finished difference Result 169 states and 850 transitions. [2019-01-18 17:41:46,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:41:46,503 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:41:46,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:46,505 INFO L225 Difference]: With dead ends: 169 [2019-01-18 17:41:46,505 INFO L226 Difference]: Without dead ends: 168 [2019-01-18 17:41:46,506 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:41:46,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-01-18 17:41:46,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2019-01-18 17:41:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-01-18 17:41:46,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 762 transitions. [2019-01-18 17:41:46,540 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 762 transitions. Word has length 5 [2019-01-18 17:41:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:46,541 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 762 transitions. [2019-01-18 17:41:46,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:41:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 762 transitions. [2019-01-18 17:41:46,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:46,542 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:46,542 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:46,542 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:46,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:46,542 INFO L82 PathProgramCache]: Analyzing trace with hash 29600602, now seen corresponding path program 1 times [2019-01-18 17:41:46,542 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:46,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:46,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:46,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:46,543 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:46,783 WARN L181 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2019-01-18 17:41:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:46,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:46,829 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:46,830 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:46,830 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [35] [2019-01-18 17:41:46,831 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:46,831 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:46,833 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:46,834 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. [2019-01-18 17:41:46,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:46,834 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:46,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:46,834 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:46,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:46,849 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:46,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:46,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-18 17:41:46,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-18 17:41:47,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-18 17:41:47,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-18 17:41:47,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,249 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-18 17:41:47,375 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-18 17:41:47,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,392 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-18 17:41:47,559 WARN L181 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-18 17:41:47,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-18 17:41:47,580 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:47,662 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:47,742 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:47,827 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:47,912 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,001 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,088 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-18 17:41:48,190 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:41:48,194 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:41:48,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:41:48,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:41:48,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:41:48,207 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:41:48,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-18 17:41:48,213 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,319 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,377 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,418 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,450 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,476 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,498 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,518 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,643 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:48,644 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-18 17:41:48,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,703 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-18 17:41:48,703 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,832 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:48,833 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-18 17:41:48,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,942 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:48,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-18 17:41:48,944 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:49,070 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:49,071 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-18 17:41:49,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:49,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:49,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:49,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:49,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:49,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:49,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:49,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:49,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:49,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:49,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:49,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:49,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:49,140 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:49,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-18 17:41:49,142 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:49,270 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:49,271 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-18 17:41:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:49,346 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:49,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:49,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:41:49,417 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:49,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:41:49,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:41:49,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:41:49,418 INFO L87 Difference]: Start difference. First operand 119 states and 762 transitions. Second operand 10 states. [2019-01-18 17:41:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:53,291 INFO L93 Difference]: Finished difference Result 176 states and 845 transitions. [2019-01-18 17:41:53,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:41:53,292 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:41:53,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:53,294 INFO L225 Difference]: With dead ends: 176 [2019-01-18 17:41:53,294 INFO L226 Difference]: Without dead ends: 172 [2019-01-18 17:41:53,294 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:41:53,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-01-18 17:41:53,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-01-18 17:41:53,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-01-18 17:41:53,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 788 transitions. [2019-01-18 17:41:53,327 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 788 transitions. Word has length 5 [2019-01-18 17:41:53,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:53,328 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 788 transitions. [2019-01-18 17:41:53,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:41:53,328 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 788 transitions. [2019-01-18 17:41:53,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:41:53,329 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:53,329 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:41:53,329 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:53,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:53,329 INFO L82 PathProgramCache]: Analyzing trace with hash 29588822, now seen corresponding path program 1 times [2019-01-18 17:41:53,329 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:53,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:53,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:53,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:53,330 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:53,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:53,529 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:53,529 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:41:53,530 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [35] [2019-01-18 17:41:53,531 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:53,531 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:53,532 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:53,532 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. [2019-01-18 17:41:53,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:53,533 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:53,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:53,533 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:53,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:53,541 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:53,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:53,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-18 17:41:53,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,635 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 [2019-01-18 17:41:53,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,701 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-18 17:41:53,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-18 17:41:53,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,880 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-18 17:41:53,999 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-18 17:41:54,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,016 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-18 17:41:54,017 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,074 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,130 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,185 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,242 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,298 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,366 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 [2019-01-18 17:41:54,386 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-18 17:41:54,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-18 17:41:54,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-18 17:41:54,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:41:54,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-18 17:41:54,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-18 17:41:54,442 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-18 17:41:54,443 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,519 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,577 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,620 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,653 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,679 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,701 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,721 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,813 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:54,813 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-18 17:41:54,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,955 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-18 17:41:54,956 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-18 17:41:54,989 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-18 17:41:56,954 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-18 17:41:56,954 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:950 [2019-01-18 17:41:58,096 WARN L181 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 183 [2019-01-18 17:41:58,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,107 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:58,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 146 [2019-01-18 17:41:58,108 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:58,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 142 [2019-01-18 17:41:58,445 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:58,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:58,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 178 [2019-01-18 17:41:58,752 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:59,071 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-01-18 17:41:59,072 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:373, output treesize:277 [2019-01-18 17:41:59,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,231 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:59,232 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 147 [2019-01-18 17:41:59,233 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:59,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,535 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 [2019-01-18 17:41:59,536 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:59,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:59,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 162 [2019-01-18 17:41:59,822 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:00,048 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-18 17:42:00,049 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:237 [2019-01-18 17:42:00,289 WARN L181 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-01-18 17:42:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:00,292 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:42:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:00,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:42:00,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-01-18 17:42:00,337 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:42:00,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:42:00,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:42:00,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-01-18 17:42:00,338 INFO L87 Difference]: Start difference. First operand 125 states and 788 transitions. Second operand 10 states. [2019-01-18 17:42:00,699 WARN L181 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 127 [2019-01-18 17:42:06,831 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-01-18 17:42:06,833 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:652) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:256) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:715) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2019-01-18 17:42:06,837 INFO L168 Benchmark]: Toolchain (without parser) took 155973.34 ms. Allocated memory was 140.5 MB in the beginning and 223.9 MB in the end (delta: 83.4 MB). Free memory was 107.8 MB in the beginning and 86.5 MB in the end (delta: 21.3 MB). Peak memory consumption was 104.6 MB. Max. memory is 7.1 GB. [2019-01-18 17:42:06,837 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory is still 109.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-18 17:42:06,838 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.30 ms. Allocated memory is still 140.5 MB. Free memory was 107.8 MB in the beginning and 105.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-01-18 17:42:06,838 INFO L168 Benchmark]: Boogie Preprocessor took 35.37 ms. Allocated memory is still 140.5 MB. Free memory was 105.4 MB in the beginning and 104.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-18 17:42:06,838 INFO L168 Benchmark]: RCFGBuilder took 459.02 ms. Allocated memory is still 140.5 MB. Free memory was 104.1 MB in the beginning and 91.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2019-01-18 17:42:06,838 INFO L168 Benchmark]: TraceAbstraction took 155411.49 ms. Allocated memory was 140.5 MB in the beginning and 223.9 MB in the end (delta: 83.4 MB). Free memory was 90.9 MB in the beginning and 86.5 MB in the end (delta: 4.4 MB). Peak memory consumption was 87.7 MB. Max. memory is 7.1 GB. [2019-01-18 17:42:06,840 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 140.5 MB. Free memory is still 109.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 62.30 ms. Allocated memory is still 140.5 MB. Free memory was 107.8 MB in the beginning and 105.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.37 ms. Allocated memory is still 140.5 MB. Free memory was 105.4 MB in the beginning and 104.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 459.02 ms. Allocated memory is still 140.5 MB. Free memory was 104.1 MB in the beginning and 91.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 155411.49 ms. Allocated memory was 140.5 MB in the beginning and 223.9 MB in the end (delta: 83.4 MB). Free memory was 90.9 MB in the beginning and 86.5 MB in the end (delta: 4.4 MB). Peak memory consumption was 87.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...