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 0.1.24-1de736e-m [2019-02-15 10:57:43,059 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-02-15 10:57:43,061 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-02-15 10:57:43,073 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-02-15 10:57:43,073 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-02-15 10:57:43,074 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-02-15 10:57:43,075 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-02-15 10:57:43,077 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-02-15 10:57:43,079 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-02-15 10:57:43,080 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-02-15 10:57:43,081 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-02-15 10:57:43,106 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 [2019-02-15 10:57:43,123 INFO L110 SettingsManager]: Loading preferences was successful [2019-02-15 10:57:43,124 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-02-15 10:57:43,125 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-02-15 10:57:43,125 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-02-15 10:57:43,125 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-02-15 10:57:43,125 INFO L133 SettingsManager]: * User list type=DISABLED [2019-02-15 10:57:43,125 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-02-15 10:57:43,126 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-02-15 10:57:43,126 INFO L133 SettingsManager]: * Explicit value domain=true [2019-02-15 10:57:43,126 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-02-15 10:57:43,126 INFO L133 SettingsManager]: * Octagon Domain=false [2019-02-15 10:57:43,126 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-02-15 10:57:43,127 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-02-15 10:57:43,127 INFO L133 SettingsManager]: * Interval Domain=false [2019-02-15 10:57:43,128 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-02-15 10:57:43,128 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-02-15 10:57:43,129 INFO L133 SettingsManager]: * Use SBE=true [2019-02-15 10:57:43,130 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-02-15 10:57:43,130 INFO L133 SettingsManager]: * sizeof long=4 [2019-02-15 10:57:43,131 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-02-15 10:57:43,131 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-02-15 10:57:43,131 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-02-15 10:57:43,131 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-02-15 10:57:43,131 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-02-15 10:57:43,132 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-02-15 10:57:43,132 INFO L133 SettingsManager]: * sizeof long double=12 [2019-02-15 10:57:43,133 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-02-15 10:57:43,133 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-02-15 10:57:43,133 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-02-15 10:57:43,133 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-02-15 10:57:43,133 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-02-15 10:57:43,134 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-02-15 10:57:43,134 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-02-15 10:57:43,134 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-02-15 10:57:43,135 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-02-15 10:57:43,135 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-02-15 10:57:43,135 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-02-15 10:57:43,135 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-02-15 10:57:43,135 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-02-15 10:57:43,136 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-02-15 10:57:43,192 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-02-15 10:57:43,204 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-02-15 10:57:43,208 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-02-15 10:57:43,209 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-02-15 10:57:43,210 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-02-15 10:57:43,211 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl [2019-02-15 10:57:43,211 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl' [2019-02-15 10:57:43,255 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-02-15 10:57:43,257 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-02-15 10:57:43,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-02-15 10:57:43,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-02-15 10:57:43,258 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-02-15 10:57:43,276 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 15.02 10:57:43" (1/1) ... [2019-02-15 10:57:43,289 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 15.02 10:57:43" (1/1) ... [2019-02-15 10:57:43,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-02-15 10:57:43,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-02-15 10:57:43,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-02-15 10:57:43,317 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-02-15 10:57:43,329 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 15.02 10:57:43" (1/1) ... [2019-02-15 10:57:43,330 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 15.02 10:57:43" (1/1) ... [2019-02-15 10:57:43,332 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 15.02 10:57:43" (1/1) ... [2019-02-15 10:57:43,332 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 15.02 10:57:43" (1/1) ... [2019-02-15 10:57:43,336 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 15.02 10:57:43" (1/1) ... [2019-02-15 10:57:43,339 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 15.02 10:57:43" (1/1) ... [2019-02-15 10:57:43,341 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 15.02 10:57:43" (1/1) ... [2019-02-15 10:57:43,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-02-15 10:57:43,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-02-15 10:57:43,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-02-15 10:57:43,344 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-02-15 10:57:43,345 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 15.02 10:57:43" (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 [2019-02-15 10:57:43,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-02-15 10:57:43,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-02-15 10:57:43,857 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-02-15 10:57:43,857 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-02-15 10:57:43,859 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:57:43 BoogieIcfgContainer [2019-02-15 10:57:43,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-02-15 10:57:43,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-02-15 10:57:43,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-02-15 10:57:43,863 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-02-15 10:57:43,864 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 15.02 10:57:43" (1/2) ... [2019-02-15 10:57:43,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2190f3f6 and model type speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:57:43, skipping insertion in model container [2019-02-15 10:57:43,865 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 15.02 10:57:43" (2/2) ... [2019-02-15 10:57:43,867 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-unlimited.bpl [2019-02-15 10:57:43,876 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-02-15 10:57:43,884 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-02-15 10:57:43,901 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-02-15 10:57:43,936 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-02-15 10:57:43,936 INFO L383 AbstractCegarLoop]: Hoare is true [2019-02-15 10:57:43,937 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-02-15 10:57:43,937 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-02-15 10:57:43,937 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-02-15 10:57:43,937 INFO L387 AbstractCegarLoop]: Difference is false [2019-02-15 10:57:43,937 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-02-15 10:57:43,938 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-02-15 10:57:43,953 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-02-15 10:57:43,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-02-15 10:57:43,959 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:57:43,960 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-02-15 10:57:43,963 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:57:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:57:43,970 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-02-15 10:57:43,972 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:57:44,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:57:44,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:57:44,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:57:44,026 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:57:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:57:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:57:44,195 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-15 10:57:44,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-15 10:57:44,195 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-15 10:57:44,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-15 10:57:44,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-15 10:57:44,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-15 10:57:44,221 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-02-15 10:57:44,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:57:44,464 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-02-15 10:57:44,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-15 10:57:44,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-02-15 10:57:44,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:57:44,479 INFO L225 Difference]: With dead ends: 37 [2019-02-15 10:57:44,479 INFO L226 Difference]: Without dead ends: 32 [2019-02-15 10:57:44,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-15 10:57:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-02-15 10:57:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-02-15 10:57:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-02-15 10:57:44,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-02-15 10:57:44,519 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-02-15 10:57:44,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:57:44,521 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-02-15 10:57:44,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-15 10:57:44,521 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-02-15 10:57:44,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-15 10:57:44,522 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:57:44,522 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-15 10:57:44,522 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:57:44,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:57:44,523 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-02-15 10:57:44,523 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:57:44,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:57:44,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:57:44,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:57:44,525 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:57:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:57:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:57:44,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:57:44,724 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:57:44,725 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-15 10:57:44,726 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-02-15 10:57:44,776 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:57:44,776 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:57:44,876 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:57:44,878 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. [2019-02-15 10:57:44,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:57:44,884 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:57:44,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:57:44,885 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:57:44,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:57:44,908 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:57:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:57:44,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:57:45,152 WARN L181 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-02-15 10:57:45,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:57:45,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:57:45,231 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,233 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:57:45,255 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,258 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,279 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:57:45,309 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,311 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,313 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,315 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:57:45,353 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,376 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,401 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,426 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,456 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,458 INFO L303 Elim1Store]: Index analysis took 134 ms [2019-02-15 10:57:45,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:57:45,503 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,506 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,512 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,514 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,517 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,518 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,521 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:57:45,544 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,546 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,548 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,571 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,584 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,587 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,589 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:45,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-15 10:57:45,594 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 10:57:46,013 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:57:46,407 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:57:46,447 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:57:46,479 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:57:46,507 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:57:46,551 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:57:46,581 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:57:46,645 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:46,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-15 10:57:46,727 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:46,728 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:46,730 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-15 10:57:46,823 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:46,825 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:46,828 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:46,829 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:46,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-15 10:57:46,991 WARN L181 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-02-15 10:57:47,003 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,009 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,010 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,011 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,014 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-15 10:57:47,130 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-02-15 10:57:47,181 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,202 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,224 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,241 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,243 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,245 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,248 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,248 INFO L303 Elim1Store]: Index analysis took 113 ms [2019-02-15 10:57:47,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-15 10:57:47,409 WARN L181 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-02-15 10:57:47,446 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,447 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,448 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,448 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,449 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,450 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,451 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,463 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,464 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,465 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-15 10:57:47,623 WARN L181 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 10:57:47,635 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,636 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,637 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,641 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,644 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,646 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,647 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:47,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-15 10:57:47,651 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 10:57:47,735 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:57:47,859 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:57:47,919 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:57:47,978 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:57:48,043 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:57:48,143 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:57:48,259 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:57:48,260 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:147, output treesize:153 [2019-02-15 10:57:48,328 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:48,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-15 10:57:48,332 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:57:48,514 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-15 10:57:48,514 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-02-15 10:57:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:57:48,568 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:57:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:57:48,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:57:48,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 10:57:48,707 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:57:48,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 10:57:48,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 10:57:48,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-15 10:57:48,708 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2019-02-15 10:57:59,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:57:59,777 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2019-02-15 10:57:59,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 10:57:59,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-15 10:57:59,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:57:59,780 INFO L225 Difference]: With dead ends: 63 [2019-02-15 10:57:59,780 INFO L226 Difference]: Without dead ends: 60 [2019-02-15 10:57:59,781 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-15 10:57:59,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-02-15 10:57:59,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-02-15 10:57:59,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-02-15 10:57:59,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2019-02-15 10:57:59,788 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2019-02-15 10:57:59,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:57:59,788 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2019-02-15 10:57:59,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 10:57:59,789 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2019-02-15 10:57:59,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-15 10:57:59,789 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:57:59,789 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-15 10:57:59,790 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:57:59,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:57:59,790 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2019-02-15 10:57:59,790 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:57:59,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:57:59,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:57:59,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:57:59,792 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:57:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:57:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:57:59,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:57:59,868 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:57:59,868 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-15 10:57:59,868 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2019-02-15 10:57:59,870 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:57:59,870 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:57:59,878 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:57:59,879 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. [2019-02-15 10:57:59,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:57:59,879 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:57:59,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:57:59,879 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:57:59,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:57:59,890 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:57:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:57:59,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:57:59,989 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:57:59,993 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:57:59,997 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:59,998 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:57:59,999 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:58:00,028 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,029 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,033 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:58:00,043 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,044 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,046 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,050 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:58:00,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,073 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,075 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,083 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:58:00,124 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,159 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,161 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,163 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,165 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,167 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:58:00,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 10:58:00,221 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:00,283 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:00,327 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:00,361 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:00,388 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:00,412 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:00,431 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:00,461 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:00,499 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 10:58:00,638 WARN L181 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-02-15 10:58:00,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,644 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 10:58:00,692 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,697 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,699 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 10:58:00,789 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,790 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,791 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,791 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,792 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,793 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 10:58:00,885 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,886 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,888 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,889 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,889 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,891 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,892 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,893 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:00,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 10:58:01,089 WARN L181 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-02-15 10:58:01,093 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:01,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:01,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:01,097 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:01,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:01,099 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:01,100 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:01,101 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:01,102 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:01,103 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:01,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 10:58:01,106 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:01,143 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:01,217 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:01,257 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:01,299 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:01,339 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:01,410 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:01,411 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-15 10:58:01,739 WARN L181 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2019-02-15 10:58:01,749 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:01,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-02-15 10:58:01,752 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:01,826 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:01,827 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-15 10:58:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:01,852 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:58:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:01,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:58:01,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 10:58:01,880 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:58:01,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 10:58:01,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 10:58:01,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-15 10:58:01,882 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2019-02-15 10:58:02,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:58:02,746 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2019-02-15 10:58:02,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 10:58:02,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-15 10:58:02,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:58:02,748 INFO L225 Difference]: With dead ends: 62 [2019-02-15 10:58:02,749 INFO L226 Difference]: Without dead ends: 60 [2019-02-15 10:58:02,750 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-15 10:58:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-02-15 10:58:02,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2019-02-15 10:58:02,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-02-15 10:58:02,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2019-02-15 10:58:02,758 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2019-02-15 10:58:02,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:58:02,758 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2019-02-15 10:58:02,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 10:58:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2019-02-15 10:58:02,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-15 10:58:02,759 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:58:02,759 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-15 10:58:02,759 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:58:02,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:02,760 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2019-02-15 10:58:02,760 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:58:02,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:02,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:02,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:02,761 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:58:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:02,817 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-15 10:58:02,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-15 10:58:02,818 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-15 10:58:02,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-15 10:58:02,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-15 10:58:02,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-15 10:58:02,819 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2019-02-15 10:58:02,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:58:02,917 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2019-02-15 10:58:02,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-15 10:58:02,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-02-15 10:58:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:58:02,919 INFO L225 Difference]: With dead ends: 31 [2019-02-15 10:58:02,919 INFO L226 Difference]: Without dead ends: 30 [2019-02-15 10:58:02,920 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-15 10:58:02,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-02-15 10:58:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-02-15 10:58:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-02-15 10:58:02,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2019-02-15 10:58:02,928 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2019-02-15 10:58:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:58:02,928 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2019-02-15 10:58:02,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-15 10:58:02,928 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2019-02-15 10:58:02,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-15 10:58:02,929 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:58:02,929 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-15 10:58:02,929 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:58:02,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:02,930 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2019-02-15 10:58:02,930 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:58:02,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:02,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:02,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:02,931 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:58:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:03,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:03,022 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:58:03,023 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-15 10:58:03,023 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2019-02-15 10:58:03,024 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:58:03,024 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:58:03,032 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:58:03,032 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. [2019-02-15 10:58:03,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:03,033 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:58:03,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:03,033 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:58:03,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:03,042 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:58:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:03,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:58:03,101 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 10:58:03,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,154 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,156 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 10:58:03,213 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,214 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,215 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,217 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 10:58:03,281 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,283 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,284 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,299 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,300 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,303 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 10:58:03,375 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,376 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,377 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,378 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,379 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,380 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,381 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,383 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,384 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 10:58:03,472 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,473 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,476 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,477 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,478 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,480 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,481 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,482 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:03,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 10:58:03,484 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:03,522 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:03,565 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:03,631 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:03,725 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:03,808 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:03,862 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:58:03,866 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:58:03,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:58:03,878 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:58:03,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:58:03,913 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:58:03,932 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:58:03,975 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 10:58:03,976 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:04,062 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:04,103 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:04,137 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:04,163 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:04,271 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:04,322 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:04,339 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:04,415 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:04,416 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:121, output treesize:125 [2019-02-15 10:58:04,493 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:04,495 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-02-15 10:58:04,496 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:04,587 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:04,587 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-15 10:58:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:04,607 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:58:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:04,631 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-02-15 10:58:04,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-02-15 10:58:04,631 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-15 10:58:04,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-15 10:58:04,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-15 10:58:04,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-15 10:58:04,632 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2019-02-15 10:58:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:58:04,737 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2019-02-15 10:58:04,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-15 10:58:04,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-02-15 10:58:04,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:58:04,738 INFO L225 Difference]: With dead ends: 32 [2019-02-15 10:58:04,739 INFO L226 Difference]: Without dead ends: 31 [2019-02-15 10:58:04,739 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 [2019-02-15 10:58:04,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-02-15 10:58:04,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-02-15 10:58:04,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-02-15 10:58:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2019-02-15 10:58:04,748 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2019-02-15 10:58:04,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:58:04,748 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2019-02-15 10:58:04,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-15 10:58:04,748 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2019-02-15 10:58:04,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-15 10:58:04,749 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:58:04,749 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-15 10:58:04,749 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:58:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:04,750 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2019-02-15 10:58:04,750 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:58:04,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:04,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:04,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:04,751 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:58:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:04,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:04,845 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:58:04,845 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-15 10:58:04,845 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2019-02-15 10:58:04,848 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:58:04,848 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:58:04,854 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:58:04,855 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. [2019-02-15 10:58:04,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:04,855 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:58:04,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:04,855 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:58:04,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:04,867 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:58:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:04,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:58:04,954 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:58:04,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:58:04,963 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:04,965 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:04,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:58:04,970 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:04,973 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:04,975 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:04,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:58:04,989 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:04,991 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:04,995 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:04,997 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:04,998 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:58:05,010 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,012 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,014 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,016 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,018 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:58:05,027 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,028 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,029 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,030 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,031 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,032 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:58:05,192 INFO L303 Elim1Store]: Index analysis took 155 ms [2019-02-15 10:58:05,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 10:58:05,195 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:05,309 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:05,354 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:05,386 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:05,414 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:05,438 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:05,457 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:05,475 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:05,520 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 10:58:05,569 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,570 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,572 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 10:58:05,621 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,622 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,623 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,625 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,626 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 10:58:05,687 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,688 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,689 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,690 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,691 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,693 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 10:58:05,762 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,763 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,763 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,765 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,767 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,771 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 10:58:05,858 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,862 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,863 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,864 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,865 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,866 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,867 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,868 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:05,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 10:58:05,871 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:05,908 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:05,945 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:05,986 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:06,024 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:06,064 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:06,133 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:06,133 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-15 10:58:06,253 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:06,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-02-15 10:58:06,255 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:06,479 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:06,479 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-15 10:58:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:06,498 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:58:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:06,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:58:06,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 10:58:06,529 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:58:06,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 10:58:06,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 10:58:06,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-15 10:58:06,530 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2019-02-15 10:58:07,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:58:07,405 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2019-02-15 10:58:07,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 10:58:07,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-15 10:58:07,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:58:07,408 INFO L225 Difference]: With dead ends: 65 [2019-02-15 10:58:07,408 INFO L226 Difference]: Without dead ends: 64 [2019-02-15 10:58:07,409 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-15 10:58:07,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-02-15 10:58:07,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2019-02-15 10:58:07,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-02-15 10:58:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2019-02-15 10:58:07,418 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2019-02-15 10:58:07,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:58:07,419 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2019-02-15 10:58:07,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 10:58:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2019-02-15 10:58:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-15 10:58:07,419 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:58:07,420 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-15 10:58:07,420 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:58:07,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:07,420 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2019-02-15 10:58:07,420 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:58:07,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:07,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:07,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:07,421 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:58:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:07,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:07,496 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:58:07,496 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-15 10:58:07,496 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2019-02-15 10:58:07,499 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:58:07,499 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:58:07,511 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:58:07,512 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. [2019-02-15 10:58:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:07,512 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:58:07,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:07,512 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:58:07,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:07,531 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:58:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:07,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:58:07,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:58:07,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:58:07,615 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:07,631 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:07,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:58:07,664 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:07,689 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:07,718 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:07,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:58:07,758 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:07,784 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:07,797 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:07,822 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:07,823 INFO L303 Elim1Store]: Index analysis took 101 ms [2019-02-15 10:58:07,824 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:58:07,867 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:07,888 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:07,907 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:07,928 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:07,953 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:07,953 INFO L303 Elim1Store]: Index analysis took 126 ms [2019-02-15 10:58:07,954 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:58:07,994 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,019 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,033 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,087 INFO L303 Elim1Store]: Index analysis took 131 ms [2019-02-15 10:58:08,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:58:08,113 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 10:58:08,113 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:08,170 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:08,213 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:08,247 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:08,274 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:08,305 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:08,323 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:08,342 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:08,387 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 10:58:08,431 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,432 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 10:58:08,479 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,480 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,481 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,482 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 10:58:08,539 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,540 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,541 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,543 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,544 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,545 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 10:58:08,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,619 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,620 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,621 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,622 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,623 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,624 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,625 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 10:58:08,714 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,716 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,717 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,718 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,719 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,720 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,721 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,722 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,723 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,724 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:08,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 10:58:08,726 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:08,765 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:08,806 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:08,845 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:08,884 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:08,924 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:08,993 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:08,994 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-15 10:58:09,035 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:09,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-02-15 10:58:09,037 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:09,101 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:09,102 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-15 10:58:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:09,119 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:58:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:09,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:58:09,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 10:58:09,148 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:58:09,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 10:58:09,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 10:58:09,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-15 10:58:09,149 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2019-02-15 10:58:09,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:58:09,849 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2019-02-15 10:58:09,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 10:58:09,850 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-15 10:58:09,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:58:09,851 INFO L225 Difference]: With dead ends: 67 [2019-02-15 10:58:09,851 INFO L226 Difference]: Without dead ends: 65 [2019-02-15 10:58:09,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-15 10:58:09,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-02-15 10:58:09,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2019-02-15 10:58:09,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-02-15 10:58:09,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 132 transitions. [2019-02-15 10:58:09,860 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 132 transitions. Word has length 3 [2019-02-15 10:58:09,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:58:09,861 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 132 transitions. [2019-02-15 10:58:09,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 10:58:09,861 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 132 transitions. [2019-02-15 10:58:09,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:58:09,861 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:58:09,862 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:58:09,862 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:58:09,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:09,862 INFO L82 PathProgramCache]: Analyzing trace with hash 954866, now seen corresponding path program 1 times [2019-02-15 10:58:09,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:58:09,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:09,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:09,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:09,863 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:58:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:09,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:09,959 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:58:09,960 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:58:09,960 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [35] [2019-02-15 10:58:09,961 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:58:09,961 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:58:09,967 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:58:09,967 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. [2019-02-15 10:58:09,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:09,968 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:58:09,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:09,968 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:58:09,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:09,982 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:58:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:09,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:58:10,029 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:58:10,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:58:10,042 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,044 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,045 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:58:10,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:58:10,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,069 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:58:10,075 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,076 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,077 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,077 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,079 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,080 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 [2019-02-15 10:58:10,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,097 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,101 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,103 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,104 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,105 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:58:10,121 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,122 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,123 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,124 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,125 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,126 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,127 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-15 10:58:10,130 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:10,316 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:10,414 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:10,450 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:10,478 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:10,502 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:10,523 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:10,540 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:10,591 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-15 10:58:10,668 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,671 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-15 10:58:10,765 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,769 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-15 10:58:10,832 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,833 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,834 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,836 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,839 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-15 10:58:10,921 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,922 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,923 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,925 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,926 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,927 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,928 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,937 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:10,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-15 10:58:11,046 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-02-15 10:58:11,051 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,054 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,055 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,057 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,058 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,059 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-15 10:58:11,183 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 10:58:11,195 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,196 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,196 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,198 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,198 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,199 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,200 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,202 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,203 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,204 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,205 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-15 10:58:11,207 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:11,259 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:11,313 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:11,366 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:11,423 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:11,481 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:11,541 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:11,649 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:11,649 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-15 10:58:11,694 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,696 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-15 10:58:11,697 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:11,794 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:11,794 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-15 10:58:11,876 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,877 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,886 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,887 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,888 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,888 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,889 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,890 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,891 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:11,891 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 10:58:11,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-02-15 10:58:11,894 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:12,023 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:12,024 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-02-15 10:58:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:12,075 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:58:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:12,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:58:12,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 10:58:12,136 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:58:12,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 10:58:12,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 10:58:12,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-15 10:58:12,137 INFO L87 Difference]: Start difference. First operand 34 states and 132 transitions. Second operand 8 states. [2019-02-15 10:58:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:58:16,328 INFO L93 Difference]: Finished difference Result 82 states and 191 transitions. [2019-02-15 10:58:16,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 10:58:16,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 10:58:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:58:16,330 INFO L225 Difference]: With dead ends: 82 [2019-02-15 10:58:16,330 INFO L226 Difference]: Without dead ends: 80 [2019-02-15 10:58:16,331 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-02-15 10:58:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-02-15 10:58:16,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2019-02-15 10:58:16,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-02-15 10:58:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 128 transitions. [2019-02-15 10:58:16,339 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 128 transitions. Word has length 4 [2019-02-15 10:58:16,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:58:16,340 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 128 transitions. [2019-02-15 10:58:16,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 10:58:16,340 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 128 transitions. [2019-02-15 10:58:16,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:58:16,340 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:58:16,341 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:58:16,341 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:58:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:16,341 INFO L82 PathProgramCache]: Analyzing trace with hash 955426, now seen corresponding path program 1 times [2019-02-15 10:58:16,341 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:58:16,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:16,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:16,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:16,342 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:58:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:16,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:16,411 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:58:16,411 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:58:16,411 INFO L207 CegarAbsIntRunner]: [0], [32], [36], [37] [2019-02-15 10:58:16,413 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:58:16,413 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:58:16,421 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:58:16,421 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. [2019-02-15 10:58:16,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:16,421 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:58:16,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:16,422 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:58:16,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:16,435 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:58:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:16,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:58:16,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-02-15 10:58:16,480 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,509 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,510 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-02-15 10:58:16,563 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,567 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,572 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,574 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,575 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-02-15 10:58:16,662 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,665 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,667 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,673 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,678 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-02-15 10:58:16,798 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2019-02-15 10:58:16,808 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,810 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,812 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,814 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,816 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,819 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,821 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,828 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:16,829 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-02-15 10:58:17,012 WARN L181 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2019-02-15 10:58:17,042 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:17,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:17,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:17,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:17,067 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:17,069 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:17,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:17,072 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:17,074 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:17,078 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:17,079 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-02-15 10:58:17,080 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:17,138 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:17,194 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:17,248 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:17,306 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:17,368 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:17,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:58:17,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-02-15 10:58:17,505 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-02-15 10:58:17,509 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-02-15 10:58:17,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-02-15 10:58:17,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-02-15 10:58:17,551 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-02-15 10:58:17,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-02-15 10:58:17,563 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:17,611 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:17,652 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:17,682 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:17,705 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:17,724 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:17,740 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:17,755 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:17,828 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:17,828 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-02-15 10:58:18,482 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:18,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 149 [2019-02-15 10:58:18,539 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-02-15 10:58:18,592 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-02-15 10:58:20,420 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 54 dim-0 vars, and 9 xjuncts. [2019-02-15 10:58:20,420 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:131, output treesize:873 [2019-02-15 10:58:32,033 WARN L181 SmtUtils]: Spent 9.39 s on a formula simplification. DAG size of input: 478 DAG size of output: 101 [2019-02-15 10:58:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:32,039 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:58:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:32,062 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-02-15 10:58:32,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-02-15 10:58:32,062 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-15 10:58:32,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-15 10:58:32,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-15 10:58:32,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-02-15 10:58:32,063 INFO L87 Difference]: Start difference. First operand 36 states and 128 transitions. Second operand 4 states. [2019-02-15 10:58:32,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:58:32,115 INFO L93 Difference]: Finished difference Result 40 states and 140 transitions. [2019-02-15 10:58:32,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-15 10:58:32,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-02-15 10:58:32,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:58:32,116 INFO L225 Difference]: With dead ends: 40 [2019-02-15 10:58:32,116 INFO L226 Difference]: Without dead ends: 39 [2019-02-15 10:58:32,117 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-02-15 10:58:32,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-02-15 10:58:32,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-02-15 10:58:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-02-15 10:58:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 138 transitions. [2019-02-15 10:58:32,125 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 138 transitions. Word has length 4 [2019-02-15 10:58:32,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:58:32,125 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 138 transitions. [2019-02-15 10:58:32,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-15 10:58:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 138 transitions. [2019-02-15 10:58:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:58:32,126 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:58:32,126 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:58:32,127 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:58:32,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:32,127 INFO L82 PathProgramCache]: Analyzing trace with hash 954990, now seen corresponding path program 1 times [2019-02-15 10:58:32,127 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:58:32,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:32,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:32,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:32,128 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:58:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:32,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:32,194 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:58:32,194 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:58:32,194 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [35] [2019-02-15 10:58:32,195 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:58:32,195 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:58:32,200 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:58:32,200 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 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-15 10:58:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:32,201 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:58:32,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:32,201 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:58:32,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:32,212 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:58:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:32,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:58:32,262 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-15 10:58:32,329 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,332 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-15 10:58:32,389 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,392 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,395 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,398 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,399 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-15 10:58:32,465 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,469 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,472 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,477 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,481 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-15 10:58:32,581 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,585 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,587 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,590 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,593 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,596 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,599 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,602 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-15 10:58:32,705 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,706 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,710 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,712 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,713 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,716 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,718 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,720 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-15 10:58:32,840 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 10:58:32,846 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,847 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,849 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,850 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,852 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,853 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,854 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,855 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,857 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,862 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:32,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-15 10:58:32,864 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:32,930 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:32,996 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:33,065 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:33,142 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:33,213 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:33,284 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:33,372 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:58:33,375 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:58:33,379 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:58:33,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:58:33,387 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:58:33,416 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:58:33,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:58:33,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-15 10:58:33,446 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:33,535 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:33,575 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:33,608 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:33,633 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:33,653 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:33,675 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:33,691 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:33,783 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:33,784 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-15 10:58:33,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:33,839 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-15 10:58:33,840 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:33,931 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:33,931 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-15 10:58:33,959 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:33,959 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:33,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:33,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:33,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:33,963 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:33,964 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:33,965 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:33,966 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:33,967 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:33,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-02-15 10:58:33,970 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:34,088 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:34,089 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-02-15 10:58:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:34,168 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:58:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:34,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:58:34,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 10:58:34,234 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:58:34,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 10:58:34,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 10:58:34,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-15 10:58:34,235 INFO L87 Difference]: Start difference. First operand 38 states and 138 transitions. Second operand 8 states. [2019-02-15 10:58:35,422 WARN L181 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2019-02-15 10:58:38,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:58:38,435 INFO L93 Difference]: Finished difference Result 84 states and 220 transitions. [2019-02-15 10:58:38,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 10:58:38,435 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 10:58:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:58:38,437 INFO L225 Difference]: With dead ends: 84 [2019-02-15 10:58:38,437 INFO L226 Difference]: Without dead ends: 82 [2019-02-15 10:58:38,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-15 10:58:38,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-02-15 10:58:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2019-02-15 10:58:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-02-15 10:58:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-02-15 10:58:38,447 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-02-15 10:58:38,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:58:38,447 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-02-15 10:58:38,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 10:58:38,447 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-02-15 10:58:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:58:38,448 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:58:38,448 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:58:38,449 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:58:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:38,449 INFO L82 PathProgramCache]: Analyzing trace with hash 954618, now seen corresponding path program 1 times [2019-02-15 10:58:38,449 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:58:38,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:38,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:38,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:38,450 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:58:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:38,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:38,529 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:58:38,530 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:58:38,530 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [35] [2019-02-15 10:58:38,531 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:58:38,531 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:58:38,535 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:58:38,535 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. [2019-02-15 10:58:38,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:38,536 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:58:38,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:38,536 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:58:38,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:38,546 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:58:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:38,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:58:38,596 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,599 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-15 10:58:38,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,650 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-15 10:58:38,707 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,708 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,710 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-15 10:58:38,779 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,780 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,781 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,813 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,826 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,827 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,828 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-15 10:58:38,910 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,911 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,913 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,914 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,915 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,917 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,918 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,919 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:38,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-15 10:58:39,031 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-02-15 10:58:39,034 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,034 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,035 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,036 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,037 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,039 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,040 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,041 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,042 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,043 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,044 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-15 10:58:39,167 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 10:58:39,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,172 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,173 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,174 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,175 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,176 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,177 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,179 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,180 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,181 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,182 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,183 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:39,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-15 10:58:39,185 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:39,246 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:39,303 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:39,363 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:39,424 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:39,484 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:39,543 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:39,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:58:39,634 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:58:39,638 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:58:39,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:58:39,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:58:39,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:58:39,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:58:39,658 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-15 10:58:39,659 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:39,733 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:39,773 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:39,805 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:39,830 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:39,850 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:39,868 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:39,884 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:39,977 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:39,978 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-15 10:58:40,045 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:40,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-15 10:58:40,047 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:40,136 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:40,136 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-15 10:58:40,210 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:40,233 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:40,255 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:40,278 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:40,299 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:40,320 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:40,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:40,372 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:40,399 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:40,408 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 10:58:40,408 INFO L303 Elim1Store]: Index analysis took 244 ms [2019-02-15 10:58:40,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-02-15 10:58:40,411 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:40,604 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:40,605 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-02-15 10:58:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:40,625 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:58:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:40,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:58:40,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 10:58:40,668 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:58:40,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 10:58:40,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 10:58:40,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-15 10:58:40,669 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-02-15 10:58:44,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:58:44,431 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-02-15 10:58:44,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 10:58:44,431 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 10:58:44,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:58:44,433 INFO L225 Difference]: With dead ends: 81 [2019-02-15 10:58:44,433 INFO L226 Difference]: Without dead ends: 80 [2019-02-15 10:58:44,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-02-15 10:58:44,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-02-15 10:58:44,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2019-02-15 10:58:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-02-15 10:58:44,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-02-15 10:58:44,442 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-02-15 10:58:44,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:58:44,442 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-02-15 10:58:44,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 10:58:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-02-15 10:58:44,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:58:44,443 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:58:44,443 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:58:44,444 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:58:44,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:44,444 INFO L82 PathProgramCache]: Analyzing trace with hash 955114, now seen corresponding path program 1 times [2019-02-15 10:58:44,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:58:44,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:44,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:44,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:44,445 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:58:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:44,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:44,573 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:58:44,573 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:58:44,573 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [35] [2019-02-15 10:58:44,577 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:58:44,577 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:58:44,588 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:58:44,588 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. [2019-02-15 10:58:44,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:44,592 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:58:44,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:44,592 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:58:44,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:44,602 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:58:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:44,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:58:44,649 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-15 10:58:44,706 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,708 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,708 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-15 10:58:44,765 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,769 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,772 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-15 10:58:44,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,841 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,843 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,846 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,848 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,851 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-15 10:58:44,935 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,938 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,941 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,944 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,947 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,949 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,952 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,954 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:44,954 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-15 10:58:45,054 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,058 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,070 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,072 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,075 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,075 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-15 10:58:45,395 WARN L181 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 10:58:45,400 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,405 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,411 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,413 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,414 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,416 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,417 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,420 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:45,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-15 10:58:45,422 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:45,520 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:45,587 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:45,656 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:45,726 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:45,799 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:45,877 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:45,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:58:45,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:58:45,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:58:45,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:58:45,982 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:58:45,985 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:58:45,989 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:58:45,993 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-15 10:58:45,994 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:46,064 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:46,105 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:46,136 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:46,159 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:46,180 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:46,197 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:46,213 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:46,305 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:46,305 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-15 10:58:46,339 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:46,340 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-15 10:58:46,341 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:46,432 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:46,433 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-15 10:58:46,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:46,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:46,476 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:46,477 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:46,478 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:46,480 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:46,481 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:46,482 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:46,483 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:46,484 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 10:58:46,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-02-15 10:58:46,486 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:46,579 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:46,580 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-02-15 10:58:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:46,731 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:58:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:46,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:58:46,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 10:58:46,775 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:58:46,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 10:58:46,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 10:58:46,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-15 10:58:46,776 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-02-15 10:58:48,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:58:48,328 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-02-15 10:58:48,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 10:58:48,328 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 10:58:48,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:58:48,329 INFO L225 Difference]: With dead ends: 81 [2019-02-15 10:58:48,329 INFO L226 Difference]: Without dead ends: 79 [2019-02-15 10:58:48,330 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 [2019-02-15 10:58:48,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-02-15 10:58:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2019-02-15 10:58:48,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-02-15 10:58:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 175 transitions. [2019-02-15 10:58:48,341 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 175 transitions. Word has length 4 [2019-02-15 10:58:48,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:58:48,341 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 175 transitions. [2019-02-15 10:58:48,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 10:58:48,342 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 175 transitions. [2019-02-15 10:58:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:58:48,342 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:58:48,342 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:58:48,343 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:58:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:48,343 INFO L82 PathProgramCache]: Analyzing trace with hash 954742, now seen corresponding path program 1 times [2019-02-15 10:58:48,343 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:58:48,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:48,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:48,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:48,344 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:58:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:48,917 WARN L181 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2019-02-15 10:58:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:48,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:48,983 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:58:48,984 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:58:48,984 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [35] [2019-02-15 10:58:48,985 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:58:48,985 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:58:48,990 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:58:48,991 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. [2019-02-15 10:58:48,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:48,991 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:58:48,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:48,991 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:58:49,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:49,001 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:58:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:49,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:58:49,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:58:49,095 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:58:49,100 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,101 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:58:49,106 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,107 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,108 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:58:49,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,114 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,116 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,118 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,119 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:58:49,138 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,142 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,144 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,147 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:58:49,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,154 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,155 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,156 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,157 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,159 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,160 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:58:49,202 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,226 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,249 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,270 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,293 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,306 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,323 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:49,323 INFO L303 Elim1Store]: Index analysis took 160 ms [2019-02-15 10:58:49,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-15 10:58:49,326 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:50,161 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:50,207 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:50,244 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:50,270 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:50,293 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:50,312 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:50,331 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:50,382 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-15 10:58:50,435 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,437 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,437 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-15 10:58:50,491 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,493 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,494 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,495 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-15 10:58:50,554 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,557 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,558 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,559 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,560 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-15 10:58:50,637 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,639 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,641 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,644 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,645 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-15 10:58:50,745 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,746 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,747 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,748 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,749 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,751 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,752 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,753 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,754 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,755 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,756 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-15 10:58:50,882 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 10:58:50,886 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,887 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,888 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,889 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,890 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,891 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,892 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,893 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,894 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,896 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,897 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,898 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:50,899 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 [2019-02-15 10:58:50,899 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:50,958 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:51,013 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:51,069 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:51,127 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:51,185 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:51,244 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:51,344 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:51,344 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-15 10:58:51,384 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:51,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-15 10:58:51,386 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:51,477 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:51,477 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-15 10:58:51,561 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:51,582 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:51,604 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:51,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:51,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:51,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:51,686 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:51,686 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:51,687 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:51,688 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:51,688 INFO L303 Elim1Store]: Index analysis took 182 ms [2019-02-15 10:58:51,689 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-02-15 10:58:51,689 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:51,783 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:51,784 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-02-15 10:58:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:51,861 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:58:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:51,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:58:51,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-15 10:58:51,910 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:58:51,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 10:58:51,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 10:58:51,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-02-15 10:58:51,911 INFO L87 Difference]: Start difference. First operand 44 states and 175 transitions. Second operand 8 states. [2019-02-15 10:58:55,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:58:55,369 INFO L93 Difference]: Finished difference Result 99 states and 274 transitions. [2019-02-15 10:58:55,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-15 10:58:55,369 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 10:58:55,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:58:55,370 INFO L225 Difference]: With dead ends: 99 [2019-02-15 10:58:55,371 INFO L226 Difference]: Without dead ends: 95 [2019-02-15 10:58:55,371 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-02-15 10:58:55,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-02-15 10:58:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2019-02-15 10:58:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-02-15 10:58:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 210 transitions. [2019-02-15 10:58:55,383 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 210 transitions. Word has length 4 [2019-02-15 10:58:55,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:58:55,384 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 210 transitions. [2019-02-15 10:58:55,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 10:58:55,384 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 210 transitions. [2019-02-15 10:58:55,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:58:55,384 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:58:55,385 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:58:55,385 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:58:55,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:55,385 INFO L82 PathProgramCache]: Analyzing trace with hash 941536, now seen corresponding path program 1 times [2019-02-15 10:58:55,385 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:58:55,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:55,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:55,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:55,386 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:58:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:55,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:55,507 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:58:55,507 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:58:55,508 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [35] [2019-02-15 10:58:55,509 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:58:55,509 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:58:55,513 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:58:55,513 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. [2019-02-15 10:58:55,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:55,514 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:58:55,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:55,514 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:58:55,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:55,526 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:58:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:55,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:58:55,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:58:55,564 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:58:55,567 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,569 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,570 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:58:55,575 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,576 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,578 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:58:55,598 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,599 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,600 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,600 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,601 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:58:55,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,662 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,663 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,664 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,664 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,665 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:58:55,669 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,675 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,676 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:58:55,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 10:58:55,691 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:55,747 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:55,791 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:55,827 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:55,855 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:55,878 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:55,898 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:55,916 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:55,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:55,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 10:58:56,004 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,006 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 10:58:56,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,054 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,055 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 10:58:56,110 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,114 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 10:58:56,183 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,184 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,185 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,186 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,187 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,188 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,189 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,190 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 10:58:56,280 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,281 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,282 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,283 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,285 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,286 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,287 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,288 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,293 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,295 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 [2019-02-15 10:58:56,296 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:56,335 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:56,373 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:56,413 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:56,451 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:56,491 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:58:56,560 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:56,560 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 10:58:56,612 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-02-15 10:58:56,614 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:56,675 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:56,675 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 10:58:56,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,703 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,705 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,706 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,707 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,708 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,710 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:56,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 134 [2019-02-15 10:58:56,712 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:58:56,778 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:58:56,778 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-02-15 10:58:56,999 WARN L181 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2019-02-15 10:58:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:57,001 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:58:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:57,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:58:57,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 10:58:57,457 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:58:57,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 10:58:57,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 10:58:57,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-15 10:58:57,459 INFO L87 Difference]: Start difference. First operand 52 states and 210 transitions. Second operand 8 states. [2019-02-15 10:58:58,014 WARN L181 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-02-15 10:58:59,057 WARN L181 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2019-02-15 10:58:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:58:59,551 INFO L93 Difference]: Finished difference Result 101 states and 289 transitions. [2019-02-15 10:58:59,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 10:58:59,551 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 10:58:59,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:58:59,553 INFO L225 Difference]: With dead ends: 101 [2019-02-15 10:58:59,553 INFO L226 Difference]: Without dead ends: 99 [2019-02-15 10:58:59,553 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-15 10:58:59,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-02-15 10:58:59,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2019-02-15 10:58:59,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-02-15 10:58:59,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 243 transitions. [2019-02-15 10:58:59,568 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 243 transitions. Word has length 4 [2019-02-15 10:58:59,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:58:59,568 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 243 transitions. [2019-02-15 10:58:59,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 10:58:59,569 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 243 transitions. [2019-02-15 10:58:59,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:58:59,569 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:58:59,569 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:58:59,570 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:58:59,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:59,570 INFO L82 PathProgramCache]: Analyzing trace with hash 941164, now seen corresponding path program 1 times [2019-02-15 10:58:59,570 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:58:59,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:59,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:59,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:58:59,571 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:58:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:58:59,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:59,700 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:58:59,700 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:58:59,701 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [35] [2019-02-15 10:58:59,702 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:58:59,702 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:58:59,706 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:58:59,706 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. [2019-02-15 10:58:59,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:58:59,706 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:58:59,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:58:59,706 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:58:59,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:58:59,715 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:58:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:58:59,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:58:59,774 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:59,774 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 [2019-02-15 10:58:59,819 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:59,820 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:59,820 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 10:58:59,868 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:59,869 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:59,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:59,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:59,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 10:58:59,929 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:59,930 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:59,931 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:59,932 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:59,933 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:59,935 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:58:59,935 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 10:59:00,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,009 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,009 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,010 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,011 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,012 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,013 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,014 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 10:59:00,117 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,118 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,120 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,121 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,122 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,123 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,125 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,126 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,127 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 10:59:00,127 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:00,168 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:00,207 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:00,246 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:00,287 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:00,328 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:00,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:00,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:59:00,386 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:59:00,389 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:59:00,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:59:00,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:59:00,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:59:00,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 10:59:00,422 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:00,474 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:00,515 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:00,546 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:00,570 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:00,590 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:00,608 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:00,623 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:00,692 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:00,692 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 10:59:00,742 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,743 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-02-15 10:59:00,743 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:00,809 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:00,809 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 10:59:00,895 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,918 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,941 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,957 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,958 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,959 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:00,960 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 10:59:00,960 INFO L303 Elim1Store]: Index analysis took 125 ms [2019-02-15 10:59:00,961 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-02-15 10:59:00,962 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:01,101 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:01,101 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-02-15 10:59:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:01,127 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:01,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:01,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 10:59:01,171 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:01,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 10:59:01,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 10:59:01,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-15 10:59:01,171 INFO L87 Difference]: Start difference. First operand 59 states and 243 transitions. Second operand 8 states. [2019-02-15 10:59:01,825 WARN L181 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-02-15 10:59:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:59:02,293 INFO L93 Difference]: Finished difference Result 99 states and 302 transitions. [2019-02-15 10:59:02,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 10:59:02,294 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 10:59:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:59:02,295 INFO L225 Difference]: With dead ends: 99 [2019-02-15 10:59:02,296 INFO L226 Difference]: Without dead ends: 98 [2019-02-15 10:59:02,296 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 [2019-02-15 10:59:02,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-02-15 10:59:02,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2019-02-15 10:59:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-02-15 10:59:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 261 transitions. [2019-02-15 10:59:02,310 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 261 transitions. Word has length 4 [2019-02-15 10:59:02,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:59:02,310 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 261 transitions. [2019-02-15 10:59:02,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 10:59:02,310 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 261 transitions. [2019-02-15 10:59:02,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:59:02,311 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:59:02,311 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:59:02,312 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:59:02,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:02,312 INFO L82 PathProgramCache]: Analyzing trace with hash 941660, now seen corresponding path program 1 times [2019-02-15 10:59:02,312 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:59:02,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:02,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:02,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:02,313 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:59:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:02,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:02,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:02,431 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:59:02,432 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:59:02,432 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [35] [2019-02-15 10:59:02,435 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:59:02,435 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:59:02,440 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:59:02,440 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. [2019-02-15 10:59:02,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:02,441 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:59:02,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:02,441 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:59:02,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:02,452 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:59:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:02,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:59:02,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:02,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:59:02,497 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,498 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:59:02,503 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,503 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,504 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,505 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:59:02,510 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,511 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,512 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,513 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,514 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:59:02,519 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,521 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,523 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,525 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,526 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,526 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:59:02,532 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,534 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,535 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,536 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,537 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,538 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:59:02,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 10:59:02,555 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:02,612 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:02,655 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:02,690 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:02,718 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:02,738 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:02,756 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:02,774 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:02,818 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 10:59:02,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,862 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 10:59:02,912 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,914 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,915 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,916 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,917 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 10:59:02,969 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,970 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,971 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,973 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,974 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,975 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:02,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 10:59:03,044 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,045 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,049 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,051 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 10:59:03,141 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,142 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,143 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,145 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,147 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,151 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,152 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 10:59:03,153 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:03,217 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:03,255 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:03,294 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:03,333 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:03,372 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:03,441 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:03,441 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 10:59:03,497 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,498 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-02-15 10:59:03,499 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:03,567 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:03,568 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 10:59:03,598 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,599 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,600 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,600 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,601 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,602 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,603 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:03,604 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 10:59:03,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-02-15 10:59:03,606 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:03,670 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:03,671 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-02-15 10:59:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:03,697 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:03,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:03,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 10:59:03,739 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:03,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 10:59:03,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 10:59:03,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-15 10:59:03,740 INFO L87 Difference]: Start difference. First operand 61 states and 261 transitions. Second operand 8 states. [2019-02-15 10:59:04,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:59:04,312 INFO L93 Difference]: Finished difference Result 101 states and 320 transitions. [2019-02-15 10:59:04,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 10:59:04,312 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 10:59:04,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:59:04,313 INFO L225 Difference]: With dead ends: 101 [2019-02-15 10:59:04,313 INFO L226 Difference]: Without dead ends: 99 [2019-02-15 10:59:04,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-02-15 10:59:04,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-02-15 10:59:04,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2019-02-15 10:59:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-02-15 10:59:04,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 278 transitions. [2019-02-15 10:59:04,330 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 278 transitions. Word has length 4 [2019-02-15 10:59:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:59:04,330 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 278 transitions. [2019-02-15 10:59:04,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 10:59:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 278 transitions. [2019-02-15 10:59:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:59:04,331 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:59:04,331 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:59:04,332 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:59:04,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:04,332 INFO L82 PathProgramCache]: Analyzing trace with hash 941288, now seen corresponding path program 1 times [2019-02-15 10:59:04,332 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:59:04,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:04,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:04,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:04,333 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:59:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:04,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:04,444 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:59:04,444 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:59:04,444 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [35] [2019-02-15 10:59:04,445 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:59:04,446 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:59:04,450 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:59:04,450 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. [2019-02-15 10:59:04,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:04,451 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:59:04,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:04,451 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:59:04,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:04,466 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:59:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:04,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:59:04,559 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 10:59:04,605 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,606 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 10:59:04,653 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,655 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,656 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,657 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,658 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 10:59:04,745 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,771 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,792 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,813 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,823 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,824 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,825 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 10:59:04,917 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,918 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,919 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,920 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,921 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,922 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,923 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,924 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:04,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 10:59:05,014 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,015 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,016 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,017 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,019 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,020 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,021 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,022 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,023 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,024 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 10:59:05,026 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:05,066 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:05,106 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:05,147 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:05,188 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:05,230 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:05,283 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:05,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:59:05,291 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:59:05,293 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:59:05,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:59:05,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:59:05,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:59:05,323 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 10:59:05,324 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:05,377 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:05,417 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:05,449 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:05,473 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:05,493 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:05,510 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:05,526 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:05,599 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:05,600 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 10:59:05,649 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-02-15 10:59:05,651 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:05,714 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:05,714 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 10:59:05,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,740 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,742 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,745 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:05,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-02-15 10:59:05,746 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:05,814 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:05,814 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-02-15 10:59:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:05,838 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:05,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:05,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 10:59:05,877 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:05,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 10:59:05,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 10:59:05,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-02-15 10:59:05,878 INFO L87 Difference]: Start difference. First operand 62 states and 278 transitions. Second operand 8 states. [2019-02-15 10:59:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:59:06,491 INFO L93 Difference]: Finished difference Result 106 states and 350 transitions. [2019-02-15 10:59:06,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 10:59:06,491 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 10:59:06,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:59:06,493 INFO L225 Difference]: With dead ends: 106 [2019-02-15 10:59:06,493 INFO L226 Difference]: Without dead ends: 104 [2019-02-15 10:59:06,493 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-02-15 10:59:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-02-15 10:59:06,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2019-02-15 10:59:06,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-02-15 10:59:06,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 304 transitions. [2019-02-15 10:59:06,508 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 304 transitions. Word has length 4 [2019-02-15 10:59:06,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:59:06,509 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 304 transitions. [2019-02-15 10:59:06,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 10:59:06,509 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 304 transitions. [2019-02-15 10:59:06,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:59:06,509 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:59:06,510 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:59:06,510 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:59:06,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:06,510 INFO L82 PathProgramCache]: Analyzing trace with hash 941784, now seen corresponding path program 1 times [2019-02-15 10:59:06,510 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:59:06,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:06,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:06,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:06,511 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:59:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:06,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:06,605 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:59:06,605 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:59:06,605 INFO L207 CegarAbsIntRunner]: [0], [18], [30], [35] [2019-02-15 10:59:06,607 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:59:06,608 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:59:06,611 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:59:06,611 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. [2019-02-15 10:59:06,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:06,611 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:59:06,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:06,612 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:59:06,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:06,621 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:59:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:06,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:59:06,696 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:06,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:59:06,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:59:06,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,710 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,711 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:59:06,716 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,717 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,718 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,719 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:59:06,725 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,725 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,726 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,727 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,728 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:59:06,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,734 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,736 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:06,740 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:59:06,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 10:59:06,770 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:06,827 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:06,872 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:06,908 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:06,936 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:06,959 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:06,979 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:06,997 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:07,040 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 10:59:07,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,085 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 10:59:07,131 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,133 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,134 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,135 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 10:59:07,192 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,193 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,194 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,195 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,196 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 10:59:07,271 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,272 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,272 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,273 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,274 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,275 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,276 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,277 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 10:59:07,369 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,371 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,372 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,373 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,374 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,375 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,376 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,377 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,378 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,379 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,380 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 10:59:07,381 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:07,424 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:07,459 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:07,498 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:07,537 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:07,577 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:07,645 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:07,646 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 10:59:07,694 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,695 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-02-15 10:59:07,696 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:07,756 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:07,757 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 10:59:07,825 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,847 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,869 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,882 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,905 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,928 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,949 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,987 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:07,987 INFO L303 Elim1Store]: Index analysis took 208 ms [2019-02-15 10:59:07,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-02-15 10:59:07,989 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:08,066 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:08,066 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-02-15 10:59:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:08,099 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:08,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:08,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 10:59:08,141 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:08,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 10:59:08,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 10:59:08,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-15 10:59:08,141 INFO L87 Difference]: Start difference. First operand 65 states and 304 transitions. Second operand 8 states. [2019-02-15 10:59:08,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:59:08,823 INFO L93 Difference]: Finished difference Result 107 states and 376 transitions. [2019-02-15 10:59:08,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 10:59:08,824 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 10:59:08,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:59:08,826 INFO L225 Difference]: With dead ends: 107 [2019-02-15 10:59:08,826 INFO L226 Difference]: Without dead ends: 99 [2019-02-15 10:59:08,826 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-15 10:59:08,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-02-15 10:59:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-02-15 10:59:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-02-15 10:59:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 328 transitions. [2019-02-15 10:59:08,841 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 328 transitions. Word has length 4 [2019-02-15 10:59:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:59:08,842 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 328 transitions. [2019-02-15 10:59:08,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 10:59:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 328 transitions. [2019-02-15 10:59:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:59:08,842 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:59:08,843 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:59:08,843 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:59:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:08,843 INFO L82 PathProgramCache]: Analyzing trace with hash 930314, now seen corresponding path program 1 times [2019-02-15 10:59:08,843 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:59:08,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:08,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:08,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:08,844 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:59:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:08,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:08,919 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:59:08,919 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:59:08,919 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [35] [2019-02-15 10:59:08,920 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:59:08,920 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:59:08,927 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:59:08,927 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. [2019-02-15 10:59:08,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:08,927 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:59:08,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:08,927 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:59:08,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:08,937 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:59:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:08,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:59:08,969 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:08,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 10:59:09,012 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,013 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,014 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 10:59:09,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,064 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 10:59:09,120 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,122 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,123 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,124 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,125 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,126 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,127 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 10:59:09,199 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,200 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,201 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,202 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,203 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,204 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,206 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,207 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,207 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 10:59:09,294 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,296 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,299 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,300 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,302 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,303 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:09,304 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 10:59:09,305 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:09,350 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:09,390 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:09,433 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:09,479 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:09,521 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:09,572 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:09,575 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:59:09,577 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:59:09,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:59:09,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:59:09,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:59:09,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:59:09,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 10:59:09,604 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:09,666 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:09,755 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:09,954 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:09,979 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:09,999 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:10,016 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:10,031 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:10,100 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:10,100 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-15 10:59:10,133 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:10,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 135 [2019-02-15 10:59:10,144 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-15 10:59:10,366 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 12 dim-0 vars, and 2 xjuncts. [2019-02-15 10:59:10,367 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:201 [2019-02-15 10:59:10,473 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:10,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:10,480 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:10,482 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:10,484 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:10,486 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:10,488 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:10,490 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:10,491 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:10,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:10,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 12 case distinctions, treesize of input 111 treesize of output 165 [2019-02-15 10:59:10,540 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-02-15 10:59:10,556 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2019-02-15 10:59:11,602 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:11,603 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:11,604 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:11,605 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:11,606 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:11,607 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:11,608 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:11,612 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 10:59:11,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 126 [2019-02-15 10:59:11,613 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:12,016 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 2 dim-1 vars, End of recursive call: 49 dim-0 vars, and 8 xjuncts. [2019-02-15 10:59:12,016 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:218, output treesize:686 [2019-02-15 10:59:12,910 WARN L181 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 114 [2019-02-15 10:59:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:12,912 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:12,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:12,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-02-15 10:59:12,936 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:12,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 10:59:12,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 10:59:12,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-02-15 10:59:12,937 INFO L87 Difference]: Start difference. First operand 66 states and 328 transitions. Second operand 8 states. [2019-02-15 10:59:16,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:59:16,903 INFO L93 Difference]: Finished difference Result 155 states and 556 transitions. [2019-02-15 10:59:16,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-15 10:59:16,904 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 10:59:16,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:59:16,907 INFO L225 Difference]: With dead ends: 155 [2019-02-15 10:59:16,907 INFO L226 Difference]: Without dead ends: 152 [2019-02-15 10:59:16,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-02-15 10:59:16,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-02-15 10:59:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2019-02-15 10:59:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-02-15 10:59:16,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 438 transitions. [2019-02-15 10:59:16,924 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 438 transitions. Word has length 4 [2019-02-15 10:59:16,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:59:16,924 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 438 transitions. [2019-02-15 10:59:16,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 10:59:16,924 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 438 transitions. [2019-02-15 10:59:16,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:59:16,925 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:59:16,925 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:59:16,925 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:59:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:16,926 INFO L82 PathProgramCache]: Analyzing trace with hash 930440, now seen corresponding path program 1 times [2019-02-15 10:59:16,926 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:59:16,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:16,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:16,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:16,927 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:59:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:17,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:17,114 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:59:17,114 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:59:17,114 INFO L207 CegarAbsIntRunner]: [0], [6], [36], [37] [2019-02-15 10:59:17,115 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:59:17,115 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:59:17,118 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:59:17,118 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. [2019-02-15 10:59:17,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:17,118 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:59:17,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:17,118 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:59:17,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:17,135 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:59:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:17,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:59:17,276 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-02-15 10:59:17,279 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:17,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:59:17,285 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,286 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:59:17,290 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,292 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,293 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:59:17,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,300 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,302 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,304 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,304 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:59:17,310 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,311 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,313 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,315 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,316 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:59:17,322 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,324 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,326 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,327 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,329 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,331 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,332 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:59:17,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 10:59:17,342 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:17,398 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:17,442 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:17,478 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:17,506 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:17,529 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:17,548 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:17,565 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:17,610 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,611 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 10:59:17,654 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,655 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 10:59:17,703 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,705 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,706 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 10:59:17,762 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,763 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,765 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,765 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,767 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 10:59:17,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,840 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,841 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,843 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,846 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 10:59:17,935 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,936 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,937 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,938 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,939 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,941 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,942 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,943 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,944 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,945 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:17,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 10:59:17,946 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:17,982 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:18,020 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:18,063 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:18,103 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:18,140 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:18,209 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:18,209 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-15 10:59:18,266 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-02-15 10:59:18,267 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:18,328 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:18,329 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-15 10:59:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:18,348 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:18,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:18,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 10:59:18,375 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:18,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 10:59:18,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 10:59:18,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-15 10:59:18,376 INFO L87 Difference]: Start difference. First operand 78 states and 438 transitions. Second operand 6 states. [2019-02-15 10:59:18,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:59:18,684 INFO L93 Difference]: Finished difference Result 104 states and 471 transitions. [2019-02-15 10:59:18,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 10:59:18,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-15 10:59:18,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:59:18,686 INFO L225 Difference]: With dead ends: 104 [2019-02-15 10:59:18,686 INFO L226 Difference]: Without dead ends: 103 [2019-02-15 10:59:18,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-15 10:59:18,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-02-15 10:59:18,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2019-02-15 10:59:18,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-02-15 10:59:18,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-02-15 10:59:18,701 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-02-15 10:59:18,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:59:18,701 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-02-15 10:59:18,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 10:59:18,701 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-02-15 10:59:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:59:18,702 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:59:18,702 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:59:18,702 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:59:18,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:18,702 INFO L82 PathProgramCache]: Analyzing trace with hash 945816, now seen corresponding path program 1 times [2019-02-15 10:59:18,703 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:59:18,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:18,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:18,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:18,703 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:59:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:18,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:18,852 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:59:18,852 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:59:18,852 INFO L207 CegarAbsIntRunner]: [0], [22], [36], [37] [2019-02-15 10:59:18,853 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:59:18,853 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:59:18,856 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:59:18,856 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. [2019-02-15 10:59:18,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:18,856 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:59:18,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:18,857 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:59:18,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:18,869 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:59:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:18,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:59:18,878 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:18,882 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-02-15 10:59:18,886 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,888 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,888 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-02-15 10:59:18,895 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,897 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,899 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-02-15 10:59:18,903 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,905 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,906 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,908 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-02-15 10:59:18,913 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,914 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,918 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,920 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,922 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,923 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-02-15 10:59:18,927 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,929 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,931 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,935 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,936 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,938 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:18,939 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-02-15 10:59:18,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-02-15 10:59:18,951 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:19,002 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:19,043 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:19,076 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:19,101 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:19,123 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:19,140 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:19,158 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:19,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-02-15 10:59:19,216 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,219 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,219 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-02-15 10:59:19,261 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,262 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,265 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,266 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-02-15 10:59:19,319 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,321 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,322 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,323 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,324 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,326 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-02-15 10:59:19,394 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,395 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,396 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,397 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,398 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,399 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,400 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-02-15 10:59:19,488 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,489 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,490 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,491 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,493 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,494 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,495 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,496 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,498 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-02-15 10:59:19,500 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:19,536 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:19,571 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:19,607 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:19,644 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:19,683 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:19,748 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:19,748 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-02-15 10:59:19,784 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:19,785 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-02-15 10:59:19,785 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:19,847 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:19,847 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-02-15 10:59:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:19,869 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:19,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:19,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 10:59:19,898 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:19,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 10:59:19,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 10:59:19,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-15 10:59:19,899 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 6 states. [2019-02-15 10:59:20,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:59:20,218 INFO L93 Difference]: Finished difference Result 108 states and 483 transitions. [2019-02-15 10:59:20,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 10:59:20,218 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-15 10:59:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:59:20,219 INFO L225 Difference]: With dead ends: 108 [2019-02-15 10:59:20,219 INFO L226 Difference]: Without dead ends: 107 [2019-02-15 10:59:20,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-15 10:59:20,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-02-15 10:59:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2019-02-15 10:59:20,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-02-15 10:59:20,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-02-15 10:59:20,239 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-02-15 10:59:20,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:59:20,239 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-02-15 10:59:20,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 10:59:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-02-15 10:59:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:59:20,240 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:59:20,240 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:59:20,240 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:59:20,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:20,241 INFO L82 PathProgramCache]: Analyzing trace with hash 945008, now seen corresponding path program 1 times [2019-02-15 10:59:20,241 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:59:20,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:20,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:20,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:20,242 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:59:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:20,417 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2019-02-15 10:59:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:20,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:20,448 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:59:20,448 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:59:20,448 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [35] [2019-02-15 10:59:20,449 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:59:20,449 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:59:20,452 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:59:20,452 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. [2019-02-15 10:59:20,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:20,453 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:59:20,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:20,453 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:59:20,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:20,464 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:59:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:20,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:59:20,494 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,495 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 10:59:20,537 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,538 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 10:59:20,587 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,588 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,589 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,590 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,591 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 10:59:20,649 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,650 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,651 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,652 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,653 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,654 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,655 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 10:59:20,725 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,726 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,727 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,729 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,731 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 10:59:20,824 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,825 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,826 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,828 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,829 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,830 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,831 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,832 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,833 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,834 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:20,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 10:59:20,836 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:20,879 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:20,919 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:20,959 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:20,999 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:21,041 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:21,089 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:21,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:59:21,094 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:59:21,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:59:21,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:59:21,115 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:59:21,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:59:21,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 10:59:21,132 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:21,183 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:21,224 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:21,255 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:21,279 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:21,299 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:21,316 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:21,331 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:21,399 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:21,400 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 10:59:21,446 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:21,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-02-15 10:59:21,447 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:21,536 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:21,536 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 10:59:21,607 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:21,621 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:21,644 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:21,666 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:21,679 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:21,703 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:21,726 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:21,747 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:21,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:21,764 INFO L303 Elim1Store]: Index analysis took 197 ms [2019-02-15 10:59:21,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-02-15 10:59:21,766 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:21,947 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:21,947 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-02-15 10:59:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:21,966 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:22,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:22,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-15 10:59:22,014 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:22,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 10:59:22,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 10:59:22,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-02-15 10:59:22,015 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 8 states. [2019-02-15 10:59:23,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:59:23,566 INFO L93 Difference]: Finished difference Result 154 states and 652 transitions. [2019-02-15 10:59:23,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-15 10:59:23,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 10:59:23,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:59:23,569 INFO L225 Difference]: With dead ends: 154 [2019-02-15 10:59:23,569 INFO L226 Difference]: Without dead ends: 153 [2019-02-15 10:59:23,569 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-02-15 10:59:23,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-02-15 10:59:23,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2019-02-15 10:59:23,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-02-15 10:59:23,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 556 transitions. [2019-02-15 10:59:23,592 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 556 transitions. Word has length 4 [2019-02-15 10:59:23,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:59:23,592 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 556 transitions. [2019-02-15 10:59:23,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 10:59:23,592 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 556 transitions. [2019-02-15 10:59:23,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:59:23,593 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:59:23,593 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:59:23,593 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:59:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:23,593 INFO L82 PathProgramCache]: Analyzing trace with hash 945504, now seen corresponding path program 1 times [2019-02-15 10:59:23,594 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:59:23,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:23,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:23,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:23,594 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:59:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:23,762 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-02-15 10:59:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:23,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:23,794 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:59:23,794 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:59:23,795 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [35] [2019-02-15 10:59:23,796 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:59:23,796 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:59:23,798 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:59:23,798 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. [2019-02-15 10:59:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:23,799 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:59:23,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:23,799 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:59:23,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:23,815 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:59:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:23,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:59:23,853 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:23,858 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:59:23,862 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,864 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:59:23,868 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:59:23,877 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,878 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,879 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,880 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,881 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 [2019-02-15 10:59:23,885 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,887 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,888 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,889 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,890 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,891 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:59:23,897 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,898 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,899 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,900 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,902 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,904 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:23,905 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:59:23,945 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 10:59:23,946 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:24,003 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:24,047 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:24,082 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:24,109 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:24,132 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:24,151 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:24,169 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:24,214 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 10:59:24,256 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,258 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,258 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 10:59:24,306 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,308 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,309 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,310 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 10:59:24,367 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,368 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,369 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,370 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,372 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,373 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 10:59:24,443 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,444 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,445 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,446 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,447 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,448 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,449 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,450 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 10:59:24,545 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,546 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,547 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,548 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,550 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,551 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,552 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,553 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,554 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,556 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 10:59:24,556 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:24,593 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:24,631 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:24,666 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:24,705 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:24,744 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:24,812 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:24,812 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 10:59:24,899 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:24,900 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-02-15 10:59:24,900 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:24,977 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:24,978 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 10:59:25,000 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:25,001 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:25,002 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:25,004 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:25,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:25,006 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:25,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:25,008 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:25,009 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:25,010 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-02-15 10:59:25,011 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:25,077 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:25,077 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-02-15 10:59:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:25,096 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:25,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:25,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-15 10:59:25,146 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:25,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 10:59:25,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 10:59:25,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-02-15 10:59:25,147 INFO L87 Difference]: Start difference. First operand 92 states and 556 transitions. Second operand 8 states. [2019-02-15 10:59:25,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:59:25,846 INFO L93 Difference]: Finished difference Result 148 states and 688 transitions. [2019-02-15 10:59:25,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-15 10:59:25,846 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 10:59:25,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:59:25,848 INFO L225 Difference]: With dead ends: 148 [2019-02-15 10:59:25,848 INFO L226 Difference]: Without dead ends: 146 [2019-02-15 10:59:25,849 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 [2019-02-15 10:59:25,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-02-15 10:59:25,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-02-15 10:59:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-02-15 10:59:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 590 transitions. [2019-02-15 10:59:25,867 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 590 transitions. Word has length 4 [2019-02-15 10:59:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:59:25,868 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 590 transitions. [2019-02-15 10:59:25,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 10:59:25,868 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 590 transitions. [2019-02-15 10:59:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:59:25,868 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:59:25,869 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:59:25,869 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:59:25,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:25,869 INFO L82 PathProgramCache]: Analyzing trace with hash 933972, now seen corresponding path program 1 times [2019-02-15 10:59:25,869 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:59:25,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:25,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:25,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:25,870 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:59:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:25,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:25,979 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:59:25,979 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:59:25,980 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [35] [2019-02-15 10:59:25,980 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:59:25,981 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:59:25,985 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:59:25,985 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. [2019-02-15 10:59:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:25,985 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:59:25,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:25,986 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:59:25,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:25,994 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:59:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:26,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:59:26,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:26,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:59:26,031 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,033 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:59:26,037 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,038 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,039 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:59:26,045 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:59:26,059 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,064 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:59:26,073 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,075 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,076 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,078 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,080 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,081 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,082 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:59:26,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 10:59:26,093 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:26,151 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:26,195 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:26,230 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:26,258 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:26,282 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:26,301 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:26,319 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:26,362 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 10:59:26,405 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 10:59:26,453 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,455 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,456 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,457 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 10:59:26,513 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,514 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,515 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,516 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,518 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,519 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,519 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 10:59:26,588 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,590 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,591 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,592 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,593 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,594 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,595 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,596 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,597 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 10:59:26,687 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,688 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,689 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,690 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,692 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,693 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,694 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,695 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,696 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,697 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:26,698 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 10:59:26,698 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:26,736 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:26,777 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:26,821 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:26,858 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:26,897 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:26,965 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:26,966 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 10:59:27,016 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-02-15 10:59:27,017 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:27,083 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:27,083 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 10:59:27,107 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,108 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,109 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,114 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,116 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 10:59:27,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 141 [2019-02-15 10:59:27,117 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:27,184 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:27,184 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:82 [2019-02-15 10:59:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:27,204 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:27,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:27,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 10:59:27,244 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:27,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 10:59:27,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 10:59:27,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-15 10:59:27,245 INFO L87 Difference]: Start difference. First operand 103 states and 590 transitions. Second operand 8 states. [2019-02-15 10:59:27,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:59:27,703 INFO L93 Difference]: Finished difference Result 145 states and 646 transitions. [2019-02-15 10:59:27,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 10:59:27,704 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 10:59:27,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:59:27,706 INFO L225 Difference]: With dead ends: 145 [2019-02-15 10:59:27,706 INFO L226 Difference]: Without dead ends: 143 [2019-02-15 10:59:27,707 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-02-15 10:59:27,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-02-15 10:59:27,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2019-02-15 10:59:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-02-15 10:59:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 599 transitions. [2019-02-15 10:59:27,724 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 599 transitions. Word has length 4 [2019-02-15 10:59:27,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:59:27,724 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 599 transitions. [2019-02-15 10:59:27,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 10:59:27,725 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 599 transitions. [2019-02-15 10:59:27,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:59:27,725 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:59:27,725 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:59:27,726 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:59:27,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:27,726 INFO L82 PathProgramCache]: Analyzing trace with hash 938128, now seen corresponding path program 1 times [2019-02-15 10:59:27,726 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:59:27,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:27,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:27,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:27,727 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:59:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:27,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:27,768 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:59:27,768 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:59:27,768 INFO L207 CegarAbsIntRunner]: [0], [14], [36], [37] [2019-02-15 10:59:27,769 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:59:27,769 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:59:27,771 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:59:27,771 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. [2019-02-15 10:59:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:27,772 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:59:27,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:27,772 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:59:27,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:27,781 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:59:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:27,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:59:27,790 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:27,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-02-15 10:59:27,797 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,798 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,799 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-02-15 10:59:27,804 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,806 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,807 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,808 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-02-15 10:59:27,811 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,813 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,814 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,816 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,816 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-02-15 10:59:27,821 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,822 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,826 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,827 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,829 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-02-15 10:59:27,834 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,835 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,836 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,840 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,841 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:27,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-02-15 10:59:27,853 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-02-15 10:59:27,854 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:27,913 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:27,956 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:27,988 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:28,013 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:28,032 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:28,050 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:28,067 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:28,104 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-02-15 10:59:28,122 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,125 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-02-15 10:59:28,166 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,167 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,169 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-02-15 10:59:28,224 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,225 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,226 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,227 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,228 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,231 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,231 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-02-15 10:59:28,297 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,300 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,302 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,303 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,304 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,306 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,307 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-02-15 10:59:28,391 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,392 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,393 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,394 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,395 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,396 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,397 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,398 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,399 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,401 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-02-15 10:59:28,403 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:28,437 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:28,473 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:28,509 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:28,546 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:28,585 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:28,649 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:28,650 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-02-15 10:59:28,680 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:28,681 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-02-15 10:59:28,681 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:28,741 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:28,741 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-02-15 10:59:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:28,786 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:28,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:28,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 10:59:28,821 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:28,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 10:59:28,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 10:59:28,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-15 10:59:28,822 INFO L87 Difference]: Start difference. First operand 104 states and 599 transitions. Second operand 6 states. [2019-02-15 10:59:29,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:59:29,263 INFO L93 Difference]: Finished difference Result 124 states and 613 transitions. [2019-02-15 10:59:29,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 10:59:29,265 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-15 10:59:29,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:59:29,266 INFO L225 Difference]: With dead ends: 124 [2019-02-15 10:59:29,266 INFO L226 Difference]: Without dead ends: 123 [2019-02-15 10:59:29,267 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-15 10:59:29,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-02-15 10:59:29,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2019-02-15 10:59:29,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-02-15 10:59:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-02-15 10:59:29,289 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 4 [2019-02-15 10:59:29,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:59:29,289 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-02-15 10:59:29,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 10:59:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-02-15 10:59:29,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:59:29,290 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:59:29,290 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:59:29,290 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:59:29,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:29,291 INFO L82 PathProgramCache]: Analyzing trace with hash 937816, now seen corresponding path program 1 times [2019-02-15 10:59:29,291 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:59:29,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:29,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:29,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:29,291 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:59:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:29,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:29,394 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:59:29,394 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:59:29,395 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [35] [2019-02-15 10:59:29,396 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:59:29,396 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:59:29,399 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:59:29,399 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. [2019-02-15 10:59:29,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:29,399 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:59:29,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:29,399 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:59:29,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:29,408 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:59:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:29,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:59:29,437 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:29,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:59:29,445 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,446 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,447 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 [2019-02-15 10:59:29,449 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,450 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,451 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:59:29,456 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,457 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,459 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,460 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:59:29,464 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,465 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,466 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,468 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,469 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:59:29,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,476 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,478 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,479 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,481 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,483 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:59:29,495 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 10:59:29,496 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:29,554 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:29,599 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:29,635 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:29,663 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:29,686 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:29,705 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:29,723 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:29,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,767 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 10:59:29,811 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,812 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,813 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 10:59:29,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,862 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,863 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 10:59:29,921 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,922 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,923 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,924 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,926 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,927 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:29,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 10:59:30,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,006 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,008 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,009 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,010 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,011 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,012 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 10:59:30,101 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,102 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,103 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,104 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,105 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,106 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,108 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,109 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,110 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 10:59:30,112 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:30,150 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:30,187 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:30,225 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:30,262 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:30,301 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:30,367 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:30,368 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 10:59:30,453 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,454 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-02-15 10:59:30,454 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:30,524 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:30,525 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 10:59:30,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,556 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,556 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,557 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,558 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,559 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,593 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,616 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:30,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-02-15 10:59:30,640 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:31,014 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:31,015 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-02-15 10:59:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:31,035 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:31,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:31,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-15 10:59:31,080 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:31,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 10:59:31,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 10:59:31,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-02-15 10:59:31,081 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 8 states. [2019-02-15 10:59:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:59:31,942 INFO L93 Difference]: Finished difference Result 176 states and 800 transitions. [2019-02-15 10:59:31,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-15 10:59:31,942 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 10:59:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:59:31,944 INFO L225 Difference]: With dead ends: 176 [2019-02-15 10:59:31,944 INFO L226 Difference]: Without dead ends: 174 [2019-02-15 10:59:31,944 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-02-15 10:59:31,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-02-15 10:59:31,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2019-02-15 10:59:31,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-02-15 10:59:31,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-02-15 10:59:31,969 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-02-15 10:59:31,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:59:31,969 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-02-15 10:59:31,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 10:59:31,969 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-02-15 10:59:31,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 10:59:31,969 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:59:31,969 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 10:59:31,970 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:59:31,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:31,970 INFO L82 PathProgramCache]: Analyzing trace with hash 953504, now seen corresponding path program 1 times [2019-02-15 10:59:31,970 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:59:31,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:31,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:31,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:31,971 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:59:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:32,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:32,045 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:59:32,046 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 10:59:32,046 INFO L207 CegarAbsIntRunner]: [0], [30], [36], [37] [2019-02-15 10:59:32,047 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:59:32,047 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:59:32,050 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:59:32,050 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. [2019-02-15 10:59:32,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:32,050 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:59:32,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:32,050 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:59:32,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:32,060 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:59:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:32,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:59:32,069 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-02-15 10:59:32,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,090 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,090 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-02-15 10:59:32,133 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,134 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,136 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,137 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-02-15 10:59:32,184 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,184 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,185 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,186 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,187 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,189 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,190 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-02-15 10:59:32,254 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,255 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,255 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,256 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,257 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,258 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,259 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,262 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-02-15 10:59:32,344 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,346 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,348 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,349 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,350 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,351 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,353 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,355 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-02-15 10:59:32,356 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:32,392 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:32,434 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:32,472 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:32,509 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:32,551 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:32,599 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:32,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-02-15 10:59:32,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-02-15 10:59:32,614 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-02-15 10:59:32,617 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-02-15 10:59:32,622 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-02-15 10:59:32,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-02-15 10:59:32,641 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-02-15 10:59:32,642 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:32,691 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:32,729 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:32,758 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:32,781 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:32,800 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:32,815 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:32,831 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:32,894 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:32,895 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-02-15 10:59:32,928 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:32,928 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-02-15 10:59:32,929 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:32,992 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:32,992 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-02-15 10:59:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:33,039 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:33,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:33,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 10:59:33,065 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:33,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 10:59:33,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 10:59:33,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-15 10:59:33,066 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 6 states. [2019-02-15 10:59:33,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:59:33,353 INFO L93 Difference]: Finished difference Result 135 states and 696 transitions. [2019-02-15 10:59:33,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 10:59:33,353 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-15 10:59:33,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:59:33,355 INFO L225 Difference]: With dead ends: 135 [2019-02-15 10:59:33,355 INFO L226 Difference]: Without dead ends: 134 [2019-02-15 10:59:33,356 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-15 10:59:33,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-02-15 10:59:33,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2019-02-15 10:59:33,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-02-15 10:59:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-02-15 10:59:33,375 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-02-15 10:59:33,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:59:33,375 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-02-15 10:59:33,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 10:59:33,375 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-02-15 10:59:33,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-15 10:59:33,375 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:59:33,375 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-15 10:59:33,376 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:59:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:33,376 INFO L82 PathProgramCache]: Analyzing trace with hash 29600478, now seen corresponding path program 1 times [2019-02-15 10:59:33,376 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:59:33,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:33,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:33,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:33,377 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:59:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:33,691 WARN L181 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2019-02-15 10:59:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:33,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:33,784 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:59:33,784 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-15 10:59:33,784 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [35] [2019-02-15 10:59:33,785 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:59:33,786 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:59:33,789 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:59:33,789 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. [2019-02-15 10:59:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:33,789 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:59:33,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:33,789 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:59:33,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:33,798 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:59:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:33,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:59:33,919 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-02-15 10:59:33,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:33,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:59:33,929 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,930 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,931 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:59:33,935 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,936 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,938 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:59:33,942 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,943 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,945 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,946 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:59:33,952 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,953 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,954 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,955 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,956 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:59:33,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,963 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,965 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,966 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,967 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,969 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:59:33,974 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,975 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,976 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,978 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,980 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,981 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:33,982 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-15 10:59:33,982 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:34,059 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:34,105 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:34,141 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:34,169 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:34,193 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:34,212 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:34,231 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:34,279 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,279 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-15 10:59:34,335 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,336 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-15 10:59:34,393 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,394 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,395 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,396 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,397 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-15 10:59:34,461 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,463 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,464 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,465 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,466 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,467 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,468 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-15 10:59:34,542 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,542 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,543 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,544 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,546 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,547 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,548 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-15 10:59:34,650 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,652 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,653 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,654 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,655 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,656 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,657 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,658 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,659 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,661 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,661 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-15 10:59:34,782 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 10:59:34,785 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,786 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,787 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,788 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,789 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,791 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,792 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,793 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,795 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,796 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,797 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:34,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-15 10:59:34,799 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:34,852 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:34,907 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:34,963 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:35,024 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:35,081 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:35,138 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:35,230 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:35,230 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-02-15 10:59:35,267 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-15 10:59:35,269 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:35,366 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:35,367 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-02-15 10:59:35,401 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,404 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,410 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,411 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 10:59:35,412 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-02-15 10:59:35,412 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:35,503 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:35,503 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-02-15 10:59:35,547 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,548 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,548 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,551 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,552 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,553 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,554 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,556 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,557 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,558 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,559 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,560 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,561 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:35,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 169 [2019-02-15 10:59:35,563 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:35,653 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:35,653 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:89 [2019-02-15 10:59:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:35,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:35,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:35,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-15 10:59:35,741 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:35,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-15 10:59:35,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-15 10:59:35,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-02-15 10:59:35,742 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 10 states. [2019-02-15 10:59:36,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:59:36,789 INFO L93 Difference]: Finished difference Result 212 states and 968 transitions. [2019-02-15 10:59:36,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-15 10:59:36,789 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-15 10:59:36,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:59:36,792 INFO L225 Difference]: With dead ends: 212 [2019-02-15 10:59:36,792 INFO L226 Difference]: Without dead ends: 205 [2019-02-15 10:59:36,793 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-02-15 10:59:36,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-02-15 10:59:36,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2019-02-15 10:59:36,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-02-15 10:59:36,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 789 transitions. [2019-02-15 10:59:36,825 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 789 transitions. Word has length 5 [2019-02-15 10:59:36,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:59:36,826 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 789 transitions. [2019-02-15 10:59:36,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-15 10:59:36,826 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 789 transitions. [2019-02-15 10:59:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-15 10:59:36,827 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:59:36,827 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-15 10:59:36,827 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:59:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:36,827 INFO L82 PathProgramCache]: Analyzing trace with hash 29600106, now seen corresponding path program 1 times [2019-02-15 10:59:36,827 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:59:36,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:36,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:36,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:36,828 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:59:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:37,060 WARN L181 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-02-15 10:59:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:37,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:37,091 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:59:37,092 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-15 10:59:37,092 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [35] [2019-02-15 10:59:37,093 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:59:37,093 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:59:37,094 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:59:37,095 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. [2019-02-15 10:59:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:37,095 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:59:37,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:37,095 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:59:37,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:37,104 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:59:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:37,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:59:37,144 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-15 10:59:37,203 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,205 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-15 10:59:37,265 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,268 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,270 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,271 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-15 10:59:37,334 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,336 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,338 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,340 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,342 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,346 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,346 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-15 10:59:37,429 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,432 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,434 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,437 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,440 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,442 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,445 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,447 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-15 10:59:37,550 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,552 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,557 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,560 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,562 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,565 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,567 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,569 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,571 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,572 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-15 10:59:37,693 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 10:59:37,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,700 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,701 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,703 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,706 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,708 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,711 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,712 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,714 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,717 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:37,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-15 10:59:37,718 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:37,782 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:37,846 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:37,911 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:37,979 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:38,059 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:38,132 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:38,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:38,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:59:38,219 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:59:38,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:59:38,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:59:38,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:59:38,232 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:59:38,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-15 10:59:38,235 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:38,305 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:38,346 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:38,376 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:38,401 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:38,421 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:38,438 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:38,454 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:38,546 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:38,546 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-02-15 10:59:38,583 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:38,584 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 [2019-02-15 10:59:38,584 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:38,674 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:38,675 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-02-15 10:59:38,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:38,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:38,716 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:38,717 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:38,718 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:38,719 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:38,720 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:38,721 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:38,722 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:38,723 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 10:59:38,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-02-15 10:59:38,724 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:38,815 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:38,816 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-02-15 10:59:40,136 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:40,138 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:40,139 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:40,140 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:40,141 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:40,142 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:40,143 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:40,145 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:40,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:40,147 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:40,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:40,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:40,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:40,151 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 10:59:40,152 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-02-15 10:59:40,153 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:40,243 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:40,244 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-02-15 10:59:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:40,275 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:40,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:40,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-15 10:59:40,335 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:40,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-15 10:59:40,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-15 10:59:40,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-02-15 10:59:40,336 INFO L87 Difference]: Start difference. First operand 122 states and 789 transitions. Second operand 10 states. [2019-02-15 10:59:43,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:59:43,672 INFO L93 Difference]: Finished difference Result 169 states and 850 transitions. [2019-02-15 10:59:43,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-15 10:59:43,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-15 10:59:43,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:59:43,675 INFO L225 Difference]: With dead ends: 169 [2019-02-15 10:59:43,675 INFO L226 Difference]: Without dead ends: 168 [2019-02-15 10:59:43,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-02-15 10:59:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-02-15 10:59:43,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2019-02-15 10:59:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-02-15 10:59:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 762 transitions. [2019-02-15 10:59:43,705 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 762 transitions. Word has length 5 [2019-02-15 10:59:43,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:59:43,705 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 762 transitions. [2019-02-15 10:59:43,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-15 10:59:43,705 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 762 transitions. [2019-02-15 10:59:43,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-15 10:59:43,706 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:59:43,706 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-15 10:59:43,706 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:59:43,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:43,706 INFO L82 PathProgramCache]: Analyzing trace with hash 29600602, now seen corresponding path program 1 times [2019-02-15 10:59:43,706 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:59:43,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:43,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:43,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:43,707 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:59:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:43,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:43,837 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:59:43,838 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-15 10:59:43,838 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [35] [2019-02-15 10:59:43,839 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:59:43,839 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:59:43,841 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:59:43,842 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. [2019-02-15 10:59:43,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:43,842 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:59:43,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:43,842 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:59:43,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:43,857 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:59:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:43,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:59:43,893 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:43,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-15 10:59:43,943 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:43,944 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:43,945 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-15 10:59:44,001 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,001 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,002 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,003 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-15 10:59:44,070 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,072 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,074 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,075 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,076 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-15 10:59:44,157 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,158 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,159 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,160 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,161 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,163 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,164 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,165 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-15 10:59:44,266 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,267 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,269 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,270 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,271 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,272 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,273 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,274 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,276 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,277 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-15 10:59:44,402 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 10:59:44,405 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,410 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,411 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,413 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,414 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,415 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,416 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,417 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:44,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-15 10:59:44,419 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:44,476 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:44,534 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:44,590 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:44,649 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:44,708 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:44,770 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:44,843 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:44,846 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:59:44,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:59:44,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:59:44,855 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:59:44,859 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:59:44,862 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:59:44,866 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-15 10:59:44,867 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:44,943 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:44,982 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:45,013 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:45,038 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:45,058 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:45,075 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:45,091 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:45,182 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:45,183 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-02-15 10:59:45,219 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-15 10:59:45,220 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:45,311 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:45,312 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-02-15 10:59:45,344 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,344 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,346 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,348 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,349 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,350 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,351 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,351 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 10:59:45,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-02-15 10:59:45,353 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:45,442 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:45,442 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-02-15 10:59:45,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,493 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,493 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,494 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,495 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,496 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,497 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,499 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,500 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,501 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,502 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,503 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,504 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:45,505 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 10:59:45,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-02-15 10:59:45,507 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:45,602 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:45,602 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-02-15 10:59:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:45,670 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:45,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:45,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-15 10:59:45,732 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:45,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-15 10:59:45,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-15 10:59:45,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-02-15 10:59:45,732 INFO L87 Difference]: Start difference. First operand 119 states and 762 transitions. Second operand 10 states. [2019-02-15 10:59:47,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 10:59:47,412 INFO L93 Difference]: Finished difference Result 176 states and 845 transitions. [2019-02-15 10:59:47,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-15 10:59:47,413 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-15 10:59:47,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 10:59:47,415 INFO L225 Difference]: With dead ends: 176 [2019-02-15 10:59:47,415 INFO L226 Difference]: Without dead ends: 172 [2019-02-15 10:59:47,416 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-02-15 10:59:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-02-15 10:59:47,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-02-15 10:59:47,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-02-15 10:59:47,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 788 transitions. [2019-02-15 10:59:47,449 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 788 transitions. Word has length 5 [2019-02-15 10:59:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 10:59:47,450 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 788 transitions. [2019-02-15 10:59:47,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-15 10:59:47,450 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 788 transitions. [2019-02-15 10:59:47,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-15 10:59:47,450 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 10:59:47,451 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-15 10:59:47,451 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 10:59:47,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:47,451 INFO L82 PathProgramCache]: Analyzing trace with hash 29588822, now seen corresponding path program 1 times [2019-02-15 10:59:47,451 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 10:59:47,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:47,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:47,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 10:59:47,452 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 10:59:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:47,645 WARN L181 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2019-02-15 10:59:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:47,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:47,690 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 10:59:47,690 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-15 10:59:47,690 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [35] [2019-02-15 10:59:47,691 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 10:59:47,691 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 10:59:47,693 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 10:59:47,693 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. [2019-02-15 10:59:47,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 10:59:47,693 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 10:59:47,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 10:59:47,693 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 10:59:47,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 10:59:47,702 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 10:59:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 10:59:47,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 10:59:47,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 10:59:47,776 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,777 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,777 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 10:59:47,824 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,825 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,826 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,827 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,827 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 10:59:47,882 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,883 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,884 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,886 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,887 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,888 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 10:59:47,957 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,958 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,959 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,963 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,964 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,965 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:47,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 10:59:48,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:48,055 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:48,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:48,057 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:48,058 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:48,059 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:48,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:48,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:48,063 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:48,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:48,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 10:59:48,065 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:48,104 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:48,144 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:48,184 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:48,225 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:48,271 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:48,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 10:59:48,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 10:59:48,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 10:59:48,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 10:59:48,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 10:59:48,380 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 10:59:48,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 10:59:48,393 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 10:59:48,394 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:48,447 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:48,488 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:48,519 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:48,543 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:48,563 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:48,580 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:48,596 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 10:59:48,664 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 10:59:48,664 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 10:59:48,713 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:48,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-02-15 10:59:48,770 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-02-15 10:59:48,803 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-02-15 10:59:50,143 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-02-15 10:59:50,144 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:974 [2019-02-15 10:59:50,780 WARN L181 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 191 [2019-02-15 10:59:50,789 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:50,790 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:50,791 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:50,791 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:50,792 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 128 treesize of output 178 [2019-02-15 10:59:50,792 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:51,059 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,063 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,067 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 166 [2019-02-15 10:59:51,069 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:51,260 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,261 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,262 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,263 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,263 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,264 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,265 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,266 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 10:59:51,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 150 [2019-02-15 10:59:51,268 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:51,430 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-02-15 10:59:51,431 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:389, output treesize:277 [2019-02-15 10:59:51,564 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,565 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,566 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,567 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,568 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,569 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,570 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,571 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,572 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,573 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,574 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,575 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,576 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,577 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 10:59:51,577 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,579 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 155 [2019-02-15 10:59:51,580 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:51,793 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,795 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,795 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,796 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,797 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,798 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,800 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,801 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,802 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,803 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,804 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,805 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,806 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,807 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,808 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,809 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:51,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 164 [2019-02-15 10:59:51,810 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:52,012 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 10:59:52,012 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 170 [2019-02-15 10:59:52,013 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-15 10:59:52,181 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-02-15 10:59:52,182 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:239 [2019-02-15 10:59:52,450 WARN L181 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-02-15 10:59:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:52,453 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 10:59:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 10:59:52,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 10:59:52,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-02-15 10:59:52,496 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 10:59:52,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-15 10:59:52,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-15 10:59:52,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-02-15 10:59:52,497 INFO L87 Difference]: Start difference. First operand 125 states and 788 transitions. Second operand 10 states. [2019-02-15 10:59:53,108 WARN L181 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 73 [2019-02-15 11:00:02,767 WARN L181 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 147 [2019-02-15 11:00:04,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:00:04,609 INFO L93 Difference]: Finished difference Result 235 states and 1248 transitions. [2019-02-15 11:00:04,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-02-15 11:00:04,610 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-15 11:00:04,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:00:04,613 INFO L225 Difference]: With dead ends: 235 [2019-02-15 11:00:04,613 INFO L226 Difference]: Without dead ends: 230 [2019-02-15 11:00:04,614 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-02-15 11:00:04,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-02-15 11:00:04,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 145. [2019-02-15 11:00:04,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-02-15 11:00:04,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 973 transitions. [2019-02-15 11:00:04,649 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 973 transitions. Word has length 5 [2019-02-15 11:00:04,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:00:04,649 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 973 transitions. [2019-02-15 11:00:04,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-15 11:00:04,649 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 973 transitions. [2019-02-15 11:00:04,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-15 11:00:04,650 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:00:04,650 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-15 11:00:04,650 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:00:04,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:00:04,651 INFO L82 PathProgramCache]: Analyzing trace with hash 29589382, now seen corresponding path program 1 times [2019-02-15 11:00:04,651 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:00:04,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:00:04,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:00:04,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:00:04,652 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:00:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:00:04,889 WARN L181 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2019-02-15 11:00:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:00:04,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:00:04,913 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:00:04,913 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-15 11:00:04,913 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [36], [37] [2019-02-15 11:00:04,914 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-15 11:00:04,914 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:00:04,916 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:00:04,916 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-15 11:00:04,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:00:04,917 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:00:04,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:00:04,917 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:00:04,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:00:04,925 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:00:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:00:04,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:00:04,956 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:04,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 11:00:05,008 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,009 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 11:00:05,054 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,055 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 11:00:05,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,120 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,121 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,122 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,123 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,124 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 11:00:05,194 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,195 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,195 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,196 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,198 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,199 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,201 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,201 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 11:00:05,289 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,290 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,291 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,292 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,294 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,296 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,297 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,299 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:05,300 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 11:00:05,301 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 11:00:05,340 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:00:05,379 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:00:05,420 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:00:05,461 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:00:05,503 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:00:05,612 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-15 11:00:05,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-15 11:00:05,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 11:00:05,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 11:00:05,623 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 11:00:05,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 11:00:05,630 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 11:00:05,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-15 11:00:05,643 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:00:05,695 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:00:05,737 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:00:05,768 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:00:05,793 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:00:05,813 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:00:05,833 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:00:05,849 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:00:05,918 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 11:00:05,918 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 11:00:05,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:00:06,018 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-02-15 11:00:06,018 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-02-15 11:00:06,043 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-02-15 11:00:07,384 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-02-15 11:00:07,384 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:972 [2019-02-15 11:00:07,989 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-02-15 11:00:08,191 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:00:08,193 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)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:626) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:152) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:286) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:215) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 45 more [2019-02-15 11:00:08,198 INFO L168 Benchmark]: Toolchain (without parser) took 144942.50 ms. Allocated memory was 132.1 MB in the beginning and 232.8 MB in the end (delta: 100.7 MB). Free memory was 107.3 MB in the beginning and 180.3 MB in the end (delta: -73.0 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. [2019-02-15 11:00:08,199 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 132.1 MB. Free memory is still 108.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-02-15 11:00:08,199 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.49 ms. Allocated memory is still 132.1 MB. Free memory was 106.9 MB in the beginning and 104.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-02-15 11:00:08,199 INFO L168 Benchmark]: Boogie Preprocessor took 26.04 ms. Allocated memory is still 132.1 MB. Free memory was 104.8 MB in the beginning and 103.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-02-15 11:00:08,200 INFO L168 Benchmark]: RCFGBuilder took 516.07 ms. Allocated memory is still 132.1 MB. Free memory was 103.1 MB in the beginning and 90.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2019-02-15 11:00:08,200 INFO L168 Benchmark]: TraceAbstraction took 144337.42 ms. Allocated memory was 132.1 MB in the beginning and 232.8 MB in the end (delta: 100.7 MB). Free memory was 90.2 MB in the beginning and 180.3 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2019-02-15 11:00:08,202 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 132.1 MB. Free memory is still 108.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 58.49 ms. Allocated memory is still 132.1 MB. Free memory was 106.9 MB in the beginning and 104.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.04 ms. Allocated memory is still 132.1 MB. Free memory was 104.8 MB in the beginning and 103.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 516.07 ms. Allocated memory is still 132.1 MB. Free memory was 103.1 MB in the beginning and 90.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 144337.42 ms. Allocated memory was 132.1 MB in the beginning and 232.8 MB in the end (delta: 100.7 MB). Free memory was 90.2 MB in the beginning and 180.3 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...