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-e1a14da [2018-12-24 14:00:01,097 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-24 14:00:01,101 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-24 14:00:01,114 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-24 14:00:01,114 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-24 14:00:01,116 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-24 14:00:01,119 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-24 14:00:01,121 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-24 14:00:01,123 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-24 14:00:01,124 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-24 14:00:01,127 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-24 14:00:01,127 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-24 14:00:01,128 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-24 14:00:01,129 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-24 14:00:01,131 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-24 14:00:01,131 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-24 14:00:01,132 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-24 14:00:01,134 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-24 14:00:01,136 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-24 14:00:01,138 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-24 14:00:01,139 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-24 14:00:01,140 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-24 14:00:01,142 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-24 14:00:01,143 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-24 14:00:01,143 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-24 14:00:01,144 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-24 14:00:01,145 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-24 14:00:01,146 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-24 14:00:01,147 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-24 14:00:01,148 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-24 14:00:01,148 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-24 14:00:01,149 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-24 14:00:01,149 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-24 14:00:01,149 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-24 14:00:01,150 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-24 14:00:01,151 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-24 14:00:01,152 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 [2018-12-24 14:00:01,170 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-24 14:00:01,171 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-24 14:00:01,174 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-24 14:00:01,174 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-24 14:00:01,174 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-24 14:00:01,175 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-24 14:00:01,175 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2018-12-24 14:00:01,175 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-24 14:00:01,175 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-24 14:00:01,175 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-24 14:00:01,175 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-24 14:00:01,177 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-24 14:00:01,178 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-24 14:00:01,178 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-24 14:00:01,179 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-24 14:00:01,179 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-24 14:00:01,179 INFO L133 SettingsManager]: * Use SBE=true [2018-12-24 14:00:01,179 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-24 14:00:01,179 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-24 14:00:01,180 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-24 14:00:01,180 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-24 14:00:01,180 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-24 14:00:01,180 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-24 14:00:01,180 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-24 14:00:01,180 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-24 14:00:01,182 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-24 14:00:01,183 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-24 14:00:01,183 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-24 14:00:01,183 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-24 14:00:01,183 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-24 14:00:01,183 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-24 14:00:01,184 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-24 14:00:01,184 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-24 14:00:01,185 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-24 14:00:01,185 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-24 14:00:01,185 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-24 14:00:01,185 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-24 14:00:01,185 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-24 14:00:01,185 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-24 14:00:01,186 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-24 14:00:01,243 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-24 14:00:01,257 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-24 14:00:01,261 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-24 14:00:01,262 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-24 14:00:01,263 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-24 14:00:01,264 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl [2018-12-24 14:00:01,264 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl' [2018-12-24 14:00:01,309 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-24 14:00:01,311 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-24 14:00:01,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-24 14:00:01,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-24 14:00:01,313 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-24 14:00:01,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:00:01" (1/1) ... [2018-12-24 14:00:01,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:00:01" (1/1) ... [2018-12-24 14:00:01,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-24 14:00:01,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-24 14:00:01,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-24 14:00:01,386 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-24 14:00:01,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:00:01" (1/1) ... [2018-12-24 14:00:01,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:00:01" (1/1) ... [2018-12-24 14:00:01,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:00:01" (1/1) ... [2018-12-24 14:00:01,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:00:01" (1/1) ... [2018-12-24 14:00:01,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:00:01" (1/1) ... [2018-12-24 14:00:01,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:00:01" (1/1) ... [2018-12-24 14:00:01,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:00:01" (1/1) ... [2018-12-24 14:00:01,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-24 14:00:01,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-24 14:00:01,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-24 14:00:01,413 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-24 14:00:01,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:00:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-24 14:00:01,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-24 14:00:01,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-24 14:00:01,857 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-24 14:00:01,857 INFO L280 CfgBuilder]: Removed 19 assue(true) statements. [2018-12-24 14:00:01,858 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 02:00:01 BoogieIcfgContainer [2018-12-24 14:00:01,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-24 14:00:01,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-24 14:00:01,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-24 14:00:01,863 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-24 14:00:01,864 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 24.12 02:00:01" (1/2) ... [2018-12-24 14:00:01,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5accd873 and model type speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 02:00:01, skipping insertion in model container [2018-12-24 14:00:01,865 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 24.12 02:00:01" (2/2) ... [2018-12-24 14:00:01,867 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-unlimited.bpl [2018-12-24 14:00:01,877 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-24 14:00:01,887 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-12-24 14:00:01,908 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2018-12-24 14:00:01,945 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-24 14:00:01,945 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-24 14:00:01,945 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-24 14:00:01,945 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-24 14:00:01,945 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-24 14:00:01,946 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-24 14:00:01,946 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-24 14:00:01,946 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-24 14:00:01,963 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-12-24 14:00:01,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-12-24 14:00:01,980 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:01,981 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2018-12-24 14:00:01,990 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:01,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:01,998 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2018-12-24 14:00:02,001 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:02,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:02,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:02,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:02,062 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:02,234 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:00:02,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-24 14:00:02,235 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:00:02,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 14:00:02,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 14:00:02,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 14:00:02,256 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2018-12-24 14:00:02,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:02,472 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2018-12-24 14:00:02,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:00:02,473 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-12-24 14:00:02,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:02,488 INFO L225 Difference]: With dead ends: 37 [2018-12-24 14:00:02,488 INFO L226 Difference]: Without dead ends: 32 [2018-12-24 14:00:02,492 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 14:00:02,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-24 14:00:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2018-12-24 14:00:02,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-24 14:00:02,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2018-12-24 14:00:02,531 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2018-12-24 14:00:02,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:02,533 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2018-12-24 14:00:02,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 14:00:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2018-12-24 14:00:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:00:02,534 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:02,534 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:00:02,534 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2018-12-24 14:00:02,535 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:02,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:02,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:02,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:02,538 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:02,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:02,724 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:02,725 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:00:02,727 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2018-12-24 14:00:02,774 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:02,775 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:02,850 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:02,852 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. [2018-12-24 14:00:02,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:02,858 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:02,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:02,858 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:02,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:02,877 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:02,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:03,221 WARN L181 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2018-12-24 14:00:03,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:00:03,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:00:03,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:00:03,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,371 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:00:03,444 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:00:03,499 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,504 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,516 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:00:03,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,548 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,553 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:00:03,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2018-12-24 14:00:03,616 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,930 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,365 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,416 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,476 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,508 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,535 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,568 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,633 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,635 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2018-12-24 14:00:04,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2018-12-24 14:00:04,837 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2018-12-24 14:00:04,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,850 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,856 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2018-12-24 14:00:05,020 WARN L181 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2018-12-24 14:00:05,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2018-12-24 14:00:05,281 WARN L181 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2018-12-24 14:00:05,329 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,353 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,412 INFO L303 Elim1Store]: Index analysis took 126 ms [2018-12-24 14:00:05,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2018-12-24 14:00:05,573 WARN L181 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2018-12-24 14:00:05,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,622 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,626 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,632 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,633 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,638 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2018-12-24 14:00:05,814 WARN L181 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:00:05,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2018-12-24 14:00:05,885 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,953 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:06,094 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:06,162 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:06,231 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:06,312 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:06,440 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:06,569 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:06,570 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:147, output treesize:153 [2018-12-24 14:00:06,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,664 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2018-12-24 14:00:06,666 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:06,867 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:06,868 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2018-12-24 14:00:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:06,900 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:07,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:07,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:00:07,132 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:07,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:00:07,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:00:07,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:00:07,133 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2018-12-24 14:00:18,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:18,444 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2018-12-24 14:00:18,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:00:18,445 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:00:18,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:18,447 INFO L225 Difference]: With dead ends: 63 [2018-12-24 14:00:18,448 INFO L226 Difference]: Without dead ends: 60 [2018-12-24 14:00:18,449 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:00:18,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-24 14:00:18,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2018-12-24 14:00:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-24 14:00:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2018-12-24 14:00:18,456 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2018-12-24 14:00:18,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:18,456 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2018-12-24 14:00:18,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:00:18,456 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2018-12-24 14:00:18,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:00:18,457 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:18,457 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:00:18,457 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:18,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:18,458 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2018-12-24 14:00:18,458 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:18,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:18,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:18,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:18,459 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:18,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:18,521 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:18,521 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:00:18,521 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2018-12-24 14:00:18,522 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:18,522 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:18,532 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:18,532 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. [2018-12-24 14:00:18,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:18,533 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:18,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:18,533 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:18,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:18,542 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:18,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:18,596 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:00:18,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:00:18,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,610 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,611 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:00:18,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:00:18,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:00:18,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,699 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:00:18,750 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,752 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,759 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:00:18,797 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:00:18,798 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,883 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,936 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,972 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,999 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,029 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,047 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,065 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:00:19,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,259 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:00:19,372 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2018-12-24 14:00:19,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:00:19,503 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,504 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,510 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:00:19,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,597 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 [2018-12-24 14:00:19,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,691 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,699 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:19,702 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:00:19,703 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,750 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,817 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,858 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,897 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:19,939 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,014 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:20,014 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2018-12-24 14:00:20,308 WARN L181 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2018-12-24 14:00:20,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:20,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2018-12-24 14:00:20,358 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:20,460 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:20,462 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2018-12-24 14:00:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:20,482 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:20,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:20,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:00:20,515 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:20,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:00:20,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:00:20,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:00:20,516 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2018-12-24 14:00:21,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:21,500 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2018-12-24 14:00:21,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:00:21,500 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:00:21,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:21,502 INFO L225 Difference]: With dead ends: 62 [2018-12-24 14:00:21,503 INFO L226 Difference]: Without dead ends: 60 [2018-12-24 14:00:21,504 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:00:21,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-24 14:00:21,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2018-12-24 14:00:21,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-24 14:00:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2018-12-24 14:00:21,510 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2018-12-24 14:00:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:21,511 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2018-12-24 14:00:21,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:00:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2018-12-24 14:00:21,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:00:21,511 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:21,512 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:00:21,512 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:21,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:21,512 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2018-12-24 14:00:21,512 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:21,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:21,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:21,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:21,513 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:21,597 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:00:21,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-24 14:00:21,597 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:00:21,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 14:00:21,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 14:00:21,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 14:00:21,598 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2018-12-24 14:00:21,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:21,677 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2018-12-24 14:00:21,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:00:21,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-24 14:00:21,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:21,678 INFO L225 Difference]: With dead ends: 31 [2018-12-24 14:00:21,679 INFO L226 Difference]: Without dead ends: 30 [2018-12-24 14:00:21,679 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 14:00:21,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-24 14:00:21,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2018-12-24 14:00:21,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-24 14:00:21,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2018-12-24 14:00:21,687 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2018-12-24 14:00:21,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:21,688 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2018-12-24 14:00:21,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 14:00:21,688 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2018-12-24 14:00:21,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:00:21,688 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:21,689 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:00:21,689 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:21,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:21,689 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2018-12-24 14:00:21,689 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:21,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:21,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:21,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:21,690 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:21,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:21,760 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:21,760 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:00:21,761 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2018-12-24 14:00:21,764 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:21,764 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:21,777 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:21,778 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. [2018-12-24 14:00:21,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:21,778 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:21,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:21,779 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:21,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:21,787 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:21,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:21,935 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2018-12-24 14:00:21,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:21,939 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:00:21,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:21,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:21,993 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:00:22,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:00:22,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,119 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:00:22,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,193 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,199 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:00:22,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,299 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,307 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:22,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:00:22,313 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,360 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,408 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,480 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,581 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,680 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,760 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:00:22,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:00:22,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:00:22,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:00:22,801 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:00:22,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:00:22,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:00:22,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:00:22,898 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:22,974 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,019 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,057 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,085 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,206 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,225 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,287 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,370 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:23,371 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:121, output treesize:125 [2018-12-24 14:00:23,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:23,464 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2018-12-24 14:00:23,465 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:23,554 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:23,554 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2018-12-24 14:00:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:23,580 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:23,608 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 14:00:23,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2018-12-24 14:00:23,608 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:00:23,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:00:23,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:00:23,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:00:23,609 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2018-12-24 14:00:23,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:23,715 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2018-12-24 14:00:23,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:00:23,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-12-24 14:00:23,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:23,718 INFO L225 Difference]: With dead ends: 32 [2018-12-24 14:00:23,718 INFO L226 Difference]: Without dead ends: 31 [2018-12-24 14:00:23,718 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:00:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-24 14:00:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2018-12-24 14:00:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-24 14:00:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2018-12-24 14:00:23,728 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2018-12-24 14:00:23,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:23,729 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2018-12-24 14:00:23,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:00:23,729 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2018-12-24 14:00:23,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:00:23,730 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:23,730 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:00:23,730 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:23,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:23,731 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2018-12-24 14:00:23,731 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:23,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:23,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:23,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:23,732 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:23,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:23,885 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:23,885 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:00:23,885 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2018-12-24 14:00:23,888 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:23,888 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:23,901 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:23,901 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. [2018-12-24 14:00:23,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:23,902 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:23,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:23,902 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:23,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:23,911 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:23,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:23,997 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:00:24,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:00:24,010 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,011 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:00:24,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,022 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:00:24,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,095 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,128 INFO L303 Elim1Store]: Index analysis took 104 ms [2018-12-24 14:00:24,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:00:24,141 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,148 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 [2018-12-24 14:00:24,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,154 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,156 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,157 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,159 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,162 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:00:24,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:00:24,216 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:24,278 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:24,324 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:24,360 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:24,389 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:24,415 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:24,434 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:24,452 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:24,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,498 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:00:24,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,548 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:00:24,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:00:24,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,669 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:00:24,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,750 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,752 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:00:24,887 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2018-12-24 14:00:24,892 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,893 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,896 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:24,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:00:24,904 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,326 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,365 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,405 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,444 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,487 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,559 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:25,559 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2018-12-24 14:00:25,616 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:25,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2018-12-24 14:00:25,619 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:25,688 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:25,688 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2018-12-24 14:00:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:25,705 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:25,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:25,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:00:25,737 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:25,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:00:25,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:00:25,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:00:25,738 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2018-12-24 14:00:26,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:26,638 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2018-12-24 14:00:26,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:00:26,638 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:00:26,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:26,639 INFO L225 Difference]: With dead ends: 65 [2018-12-24 14:00:26,639 INFO L226 Difference]: Without dead ends: 64 [2018-12-24 14:00:26,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:00:26,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-24 14:00:26,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2018-12-24 14:00:26,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-24 14:00:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2018-12-24 14:00:26,650 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2018-12-24 14:00:26,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:26,650 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2018-12-24 14:00:26,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:00:26,651 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2018-12-24 14:00:26,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:00:26,651 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:26,651 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:00:26,652 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:26,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:26,652 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2018-12-24 14:00:26,652 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:26,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:26,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:26,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:26,653 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:26,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:26,770 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:26,770 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:00:26,770 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2018-12-24 14:00:26,772 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:26,772 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:26,777 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:26,778 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. [2018-12-24 14:00:26,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:26,778 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:26,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:26,778 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:26,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:26,788 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:26,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:26,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:00:26,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:00:26,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,847 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:00:26,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,857 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:00:26,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:00:26,913 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,936 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:26,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,008 INFO L303 Elim1Store]: Index analysis took 131 ms [2018-12-24 14:00:27,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:00:27,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,066 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,068 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,069 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,070 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:00:27,087 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:00:27,088 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,333 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,379 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,415 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,442 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,466 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,484 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,501 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,548 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:00:27,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:00:27,640 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,643 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:00:27,703 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,707 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:00:27,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:00:27,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,882 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:27,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:00:27,890 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,929 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:27,969 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:28,012 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:28,060 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:28,102 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:28,176 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:28,176 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2018-12-24 14:00:28,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:28,227 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2018-12-24 14:00:28,228 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:28,293 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:28,294 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2018-12-24 14:00:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:28,312 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:28,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:28,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:00:28,349 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:28,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:00:28,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:00:28,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:00:28,350 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2018-12-24 14:00:29,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:29,082 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2018-12-24 14:00:29,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:00:29,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:00:29,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:29,084 INFO L225 Difference]: With dead ends: 67 [2018-12-24 14:00:29,084 INFO L226 Difference]: Without dead ends: 65 [2018-12-24 14:00:29,085 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:00:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-12-24 14:00:29,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2018-12-24 14:00:29,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-24 14:00:29,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 132 transitions. [2018-12-24 14:00:29,094 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 132 transitions. Word has length 3 [2018-12-24 14:00:29,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:29,094 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 132 transitions. [2018-12-24 14:00:29,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:00:29,095 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 132 transitions. [2018-12-24 14:00:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:29,095 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:29,095 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:29,096 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:29,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:29,096 INFO L82 PathProgramCache]: Analyzing trace with hash 954866, now seen corresponding path program 1 times [2018-12-24 14:00:29,096 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:29,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:29,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:29,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:29,097 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:29,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:29,181 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:29,182 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:29,182 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [35] [2018-12-24 14:00:29,183 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:29,184 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:29,189 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:29,189 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. [2018-12-24 14:00:29,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:29,190 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:29,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:29,190 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:29,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:29,199 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:29,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:29,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:00:29,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:00:29,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:00:29,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:00:29,292 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:00:29,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,306 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,307 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:00:29,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:00:29,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,368 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2018-12-24 14:00:29,369 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,568 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,670 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,708 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,743 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,770 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,793 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,815 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:29,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,875 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2018-12-24 14:00:29,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:29,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2018-12-24 14:00:30,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2018-12-24 14:00:30,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2018-12-24 14:00:30,297 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2018-12-24 14:00:30,420 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2018-12-24 14:00:30,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,438 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2018-12-24 14:00:30,577 WARN L181 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:00:30,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,600 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:30,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2018-12-24 14:00:30,605 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:30,675 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:30,742 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:30,798 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:30,855 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,011 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,067 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,159 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:31,160 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2018-12-24 14:00:31,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2018-12-24 14:00:31,241 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,332 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:31,333 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2018-12-24 14:00:31,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,440 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,441 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,442 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:31,443 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:31,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2018-12-24 14:00:31,445 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:31,535 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:31,536 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2018-12-24 14:00:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:31,638 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:31,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:31,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:31,702 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:31,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:31,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:31,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:31,703 INFO L87 Difference]: Start difference. First operand 34 states and 132 transitions. Second operand 8 states. [2018-12-24 14:00:36,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:36,206 INFO L93 Difference]: Finished difference Result 82 states and 191 transitions. [2018-12-24 14:00:36,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:36,206 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:00:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:36,208 INFO L225 Difference]: With dead ends: 82 [2018-12-24 14:00:36,208 INFO L226 Difference]: Without dead ends: 80 [2018-12-24 14:00:36,208 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 [2018-12-24 14:00:36,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-12-24 14:00:36,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2018-12-24 14:00:36,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-24 14:00:36,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 128 transitions. [2018-12-24 14:00:36,219 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 128 transitions. Word has length 4 [2018-12-24 14:00:36,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:36,219 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 128 transitions. [2018-12-24 14:00:36,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:36,219 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 128 transitions. [2018-12-24 14:00:36,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:36,220 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:36,220 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:36,221 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:36,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:36,221 INFO L82 PathProgramCache]: Analyzing trace with hash 955426, now seen corresponding path program 1 times [2018-12-24 14:00:36,221 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:36,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:36,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:36,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:36,222 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:36,499 WARN L181 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2018-12-24 14:00:36,657 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2018-12-24 14:00:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:36,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:36,658 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:36,658 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:36,659 INFO L207 CegarAbsIntRunner]: [0], [32], [36], [37] [2018-12-24 14:00:36,660 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:36,660 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:36,669 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:36,669 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. [2018-12-24 14:00:36,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:36,670 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:36,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:36,670 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:36,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:36,687 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:36,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:36,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2018-12-24 14:00:36,906 WARN L181 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-12-24 14:00:36,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,985 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,986 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2018-12-24 14:00:37,097 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2018-12-24 14:00:37,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,115 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2018-12-24 14:00:37,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,182 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,185 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,187 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2018-12-24 14:00:37,263 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,283 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2018-12-24 14:00:37,371 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,372 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,374 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,376 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,377 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,379 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,381 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,383 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,384 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,389 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2018-12-24 14:00:37,390 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,448 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,506 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,564 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,621 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,683 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:00:37,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2018-12-24 14:00:37,836 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2018-12-24 14:00:37,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2018-12-24 14:00:37,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2018-12-24 14:00:37,854 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2018-12-24 14:00:37,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2018-12-24 14:00:37,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2018-12-24 14:00:37,919 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:37,969 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,009 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,039 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,062 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,082 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,137 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,153 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,219 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:38,220 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2018-12-24 14:00:38,948 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,005 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 149 [2018-12-24 14:00:39,006 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2018-12-24 14:00:39,060 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2018-12-24 14:00:41,011 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 54 dim-0 vars, and 9 xjuncts. [2018-12-24 14:00:41,011 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:131, output treesize:885 [2018-12-24 14:00:56,416 WARN L181 SmtUtils]: Spent 11.06 s on a formula simplification. DAG size of input: 485 DAG size of output: 103 [2018-12-24 14:00:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:56,423 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:56,487 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 14:00:56,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2018-12-24 14:00:56,487 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:00:56,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:00:56,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:00:56,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2018-12-24 14:00:56,488 INFO L87 Difference]: Start difference. First operand 36 states and 128 transitions. Second operand 4 states. [2018-12-24 14:00:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:56,540 INFO L93 Difference]: Finished difference Result 40 states and 140 transitions. [2018-12-24 14:00:56,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:00:56,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-24 14:00:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:56,541 INFO L225 Difference]: With dead ends: 40 [2018-12-24 14:00:56,541 INFO L226 Difference]: Without dead ends: 39 [2018-12-24 14:00:56,542 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2018-12-24 14:00:56,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-24 14:00:56,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-12-24 14:00:56,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-24 14:00:56,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 138 transitions. [2018-12-24 14:00:56,550 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 138 transitions. Word has length 4 [2018-12-24 14:00:56,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:56,550 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 138 transitions. [2018-12-24 14:00:56,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:00:56,551 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 138 transitions. [2018-12-24 14:00:56,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:56,551 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:56,551 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:56,552 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:56,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:56,552 INFO L82 PathProgramCache]: Analyzing trace with hash 954990, now seen corresponding path program 1 times [2018-12-24 14:00:56,552 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:56,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:56,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:56,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:56,554 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:56,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:56,617 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:56,617 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:56,617 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [35] [2018-12-24 14:00:56,619 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:56,619 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:56,624 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:56,624 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. [2018-12-24 14:00:56,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:56,625 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:56,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:56,625 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:56,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:56,639 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:56,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:56,688 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:56,689 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2018-12-24 14:00:56,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:56,768 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:56,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2018-12-24 14:00:56,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:56,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:56,832 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:56,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:56,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2018-12-24 14:00:56,906 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:56,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:56,912 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:56,914 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:56,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:56,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:56,921 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2018-12-24 14:00:57,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2018-12-24 14:00:57,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,140 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,159 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2018-12-24 14:00:57,281 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:00:57,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,353 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:57,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2018-12-24 14:00:57,371 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,435 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,500 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,570 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,647 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,722 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,795 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:57,882 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:00:57,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:00:57,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:00:57,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:00:57,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:00:57,913 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:00:57,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:00:57,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2018-12-24 14:00:57,930 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,002 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,045 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,079 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,105 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,127 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,145 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,162 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,257 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:58,257 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2018-12-24 14:00:58,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2018-12-24 14:00:58,290 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,418 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:58,419 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2018-12-24 14:00:58,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,451 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:58,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2018-12-24 14:00:58,461 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:58,583 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:58,583 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2018-12-24 14:00:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:58,678 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:58,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:58,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:58,755 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:58,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:58,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:58,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:58,756 INFO L87 Difference]: Start difference. First operand 38 states and 138 transitions. Second operand 8 states. [2018-12-24 14:01:02,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:02,637 INFO L93 Difference]: Finished difference Result 84 states and 220 transitions. [2018-12-24 14:01:02,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:02,638 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:01:02,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:02,639 INFO L225 Difference]: With dead ends: 84 [2018-12-24 14:01:02,639 INFO L226 Difference]: Without dead ends: 82 [2018-12-24 14:01:02,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:02,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-12-24 14:01:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2018-12-24 14:01:02,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-24 14:01:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2018-12-24 14:01:02,652 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2018-12-24 14:01:02,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:02,652 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2018-12-24 14:01:02,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:02,652 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2018-12-24 14:01:02,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:02,653 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:02,653 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:02,655 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:02,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:02,655 INFO L82 PathProgramCache]: Analyzing trace with hash 954618, now seen corresponding path program 1 times [2018-12-24 14:01:02,655 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:02,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:02,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:02,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:02,656 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:02,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:02,753 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:02,754 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:02,754 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [35] [2018-12-24 14:01:02,754 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:02,755 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:02,761 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:02,761 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. [2018-12-24 14:01:02,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:02,762 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:02,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:02,762 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:02,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:02,771 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:02,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:02,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,856 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2018-12-24 14:01:02,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,935 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2018-12-24 14:01:02,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2018-12-24 14:01:03,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2018-12-24 14:01:03,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,154 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2018-12-24 14:01:03,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,254 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,256 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,257 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,258 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,259 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,262 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,263 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,264 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2018-12-24 14:01:03,385 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:01:03,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2018-12-24 14:01:03,404 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,466 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,524 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,583 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,644 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,705 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,767 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,854 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:01:03,858 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:01:03,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:01:03,865 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:01:03,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:01:03,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:01:03,878 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:01:03,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2018-12-24 14:01:03,890 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,090 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,196 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,228 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,252 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,272 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,290 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,304 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,397 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:04,397 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2018-12-24 14:01:04,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2018-12-24 14:01:04,434 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,527 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:04,527 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2018-12-24 14:01:04,748 WARN L181 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2018-12-24 14:01:04,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,935 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,935 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:04,936 INFO L303 Elim1Store]: Index analysis took 182 ms [2018-12-24 14:01:04,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2018-12-24 14:01:04,937 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,031 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:05,032 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2018-12-24 14:01:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:05,054 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:05,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:05,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:05,097 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:05,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:05,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:05,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:05,098 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2018-12-24 14:01:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:08,753 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2018-12-24 14:01:08,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:08,754 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:01:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:08,755 INFO L225 Difference]: With dead ends: 81 [2018-12-24 14:01:08,755 INFO L226 Difference]: Without dead ends: 80 [2018-12-24 14:01:08,756 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 [2018-12-24 14:01:08,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-12-24 14:01:08,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2018-12-24 14:01:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-24 14:01:08,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2018-12-24 14:01:08,766 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2018-12-24 14:01:08,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:08,766 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2018-12-24 14:01:08,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:08,766 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2018-12-24 14:01:08,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:08,767 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:08,767 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:08,767 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:08,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:08,768 INFO L82 PathProgramCache]: Analyzing trace with hash 955114, now seen corresponding path program 1 times [2018-12-24 14:01:08,768 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:08,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:08,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:08,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:08,769 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:08,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:08,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:08,962 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:08,962 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:08,962 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [35] [2018-12-24 14:01:08,963 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:08,964 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:08,969 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:08,969 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. [2018-12-24 14:01:08,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:08,969 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:08,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:08,970 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:08,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:08,981 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:08,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:09,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2018-12-24 14:01:09,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,082 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2018-12-24 14:01:09,137 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,141 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2018-12-24 14:01:09,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,227 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2018-12-24 14:01:09,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2018-12-24 14:01:09,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,442 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,444 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,447 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2018-12-24 14:01:09,564 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:01:09,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,575 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:09,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2018-12-24 14:01:09,589 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,689 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,756 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,825 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,896 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,969 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:10,044 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:10,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:01:10,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:01:10,142 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:01:10,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:01:10,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:01:10,152 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:01:10,156 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:01:10,160 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2018-12-24 14:01:10,161 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:10,231 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:10,271 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:10,302 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:10,327 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:10,348 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:10,365 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:10,381 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:10,474 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:10,475 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2018-12-24 14:01:10,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,509 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2018-12-24 14:01:10,510 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:10,611 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:10,611 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2018-12-24 14:01:10,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,643 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,644 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,645 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:10,650 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:10,651 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2018-12-24 14:01:10,653 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:10,744 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:10,745 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2018-12-24 14:01:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:10,918 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:10,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:10,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:10,958 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:10,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:10,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:10,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:10,959 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2018-12-24 14:01:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:12,550 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2018-12-24 14:01:12,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:12,550 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:01:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:12,551 INFO L225 Difference]: With dead ends: 81 [2018-12-24 14:01:12,552 INFO L226 Difference]: Without dead ends: 79 [2018-12-24 14:01:12,552 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-12-24 14:01:12,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2018-12-24 14:01:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-24 14:01:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 175 transitions. [2018-12-24 14:01:12,563 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 175 transitions. Word has length 4 [2018-12-24 14:01:12,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:12,563 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 175 transitions. [2018-12-24 14:01:12,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:12,563 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 175 transitions. [2018-12-24 14:01:12,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:12,564 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:12,564 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:12,564 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:12,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:12,564 INFO L82 PathProgramCache]: Analyzing trace with hash 954742, now seen corresponding path program 1 times [2018-12-24 14:01:12,565 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:12,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:12,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:12,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:12,566 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:12,750 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2018-12-24 14:01:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:12,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:12,834 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:12,834 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:12,834 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [35] [2018-12-24 14:01:12,835 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:12,835 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:12,840 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:12,840 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. [2018-12-24 14:01:12,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:12,840 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:12,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:12,840 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:12,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:12,851 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:12,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:12,913 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:01:12,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:01:12,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:01:12,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,932 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:01:12,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:01:12,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,960 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:01:12,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:01:13,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:13,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:13,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:13,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:13,094 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:13,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:13,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:13,142 INFO L303 Elim1Store]: Index analysis took 166 ms [2018-12-24 14:01:13,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2018-12-24 14:01:13,144 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,005 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,349 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,384 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,413 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,437 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,455 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,474 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,526 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2018-12-24 14:01:14,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,578 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2018-12-24 14:01:14,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,638 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,638 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2018-12-24 14:01:14,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,702 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,703 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2018-12-24 14:01:14,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2018-12-24 14:01:14,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,903 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,905 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,907 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2018-12-24 14:01:15,029 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:01:15,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,047 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2018-12-24 14:01:15,047 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,102 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,157 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,213 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,271 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,326 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,383 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,475 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:15,475 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2018-12-24 14:01:15,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2018-12-24 14:01:15,521 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,611 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:15,612 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2018-12-24 14:01:15,737 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,851 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,882 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,882 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,883 INFO L303 Elim1Store]: Index analysis took 184 ms [2018-12-24 14:01:15,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2018-12-24 14:01:15,884 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,979 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:15,979 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2018-12-24 14:01:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:16,061 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:16,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:16,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:01:16,112 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:16,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:16,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:16,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:01:16,112 INFO L87 Difference]: Start difference. First operand 44 states and 175 transitions. Second operand 8 states. [2018-12-24 14:01:19,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:19,671 INFO L93 Difference]: Finished difference Result 99 states and 274 transitions. [2018-12-24 14:01:19,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:01:19,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:01:19,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:19,673 INFO L225 Difference]: With dead ends: 99 [2018-12-24 14:01:19,674 INFO L226 Difference]: Without dead ends: 95 [2018-12-24 14:01:19,674 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:01:19,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-12-24 14:01:19,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2018-12-24 14:01:19,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-12-24 14:01:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 210 transitions. [2018-12-24 14:01:19,690 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 210 transitions. Word has length 4 [2018-12-24 14:01:19,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:19,690 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 210 transitions. [2018-12-24 14:01:19,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:19,690 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 210 transitions. [2018-12-24 14:01:19,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:19,691 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:19,691 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:19,692 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:19,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:19,692 INFO L82 PathProgramCache]: Analyzing trace with hash 941536, now seen corresponding path program 1 times [2018-12-24 14:01:19,692 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:19,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:19,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:19,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:19,693 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:19,872 WARN L181 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-12-24 14:01:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:19,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:19,885 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:19,885 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:19,885 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [35] [2018-12-24 14:01:19,887 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:19,887 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:19,892 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:19,892 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. [2018-12-24 14:01:19,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:19,895 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:19,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:19,895 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:19,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:19,905 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:19,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:19,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:01:19,945 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:01:19,952 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,955 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:01:19,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:01:19,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:01:19,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,998 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,000 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,001 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:01:20,007 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,010 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:01:20,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:01:20,042 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,107 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,160 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,208 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,236 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,258 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,275 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,293 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,340 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:20,383 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,384 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:20,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,437 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:20,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,495 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,496 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,498 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:20,564 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,566 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,568 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:20,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,669 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:20,671 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,735 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,773 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,815 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,854 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,892 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,960 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:20,960 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:01:21,004 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,005 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2018-12-24 14:01:21,005 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,066 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:21,067 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:01:21,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,097 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,098 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 134 [2018-12-24 14:01:21,106 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,173 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:21,173 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2018-12-24 14:01:21,389 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2018-12-24 14:01:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:21,390 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:21,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:21,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:21,796 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:21,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:21,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:21,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:21,797 INFO L87 Difference]: Start difference. First operand 52 states and 210 transitions. Second operand 8 states. [2018-12-24 14:01:22,319 WARN L181 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2018-12-24 14:01:23,386 WARN L181 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2018-12-24 14:01:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:23,723 INFO L93 Difference]: Finished difference Result 101 states and 289 transitions. [2018-12-24 14:01:23,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:23,723 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:01:23,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:23,725 INFO L225 Difference]: With dead ends: 101 [2018-12-24 14:01:23,725 INFO L226 Difference]: Without dead ends: 99 [2018-12-24 14:01:23,726 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 [2018-12-24 14:01:23,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-12-24 14:01:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2018-12-24 14:01:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-24 14:01:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 243 transitions. [2018-12-24 14:01:23,741 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 243 transitions. Word has length 4 [2018-12-24 14:01:23,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:23,741 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 243 transitions. [2018-12-24 14:01:23,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:23,741 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 243 transitions. [2018-12-24 14:01:23,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:23,742 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:23,742 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:23,742 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:23,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:23,742 INFO L82 PathProgramCache]: Analyzing trace with hash 941164, now seen corresponding path program 1 times [2018-12-24 14:01:23,743 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:23,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:23,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:23,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:23,744 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:23,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:23,805 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:23,805 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:23,805 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [35] [2018-12-24 14:01:23,807 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:23,807 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:23,811 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:23,811 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. [2018-12-24 14:01:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:23,812 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:23,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:23,812 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:23,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:23,825 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:23,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:23,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:23,906 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:23,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:23,960 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:24,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,024 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:24,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,097 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:24,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:24,219 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:24,219 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:24,256 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:24,295 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:24,337 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:24,378 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:24,419 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:24,468 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:01:24,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:01:24,476 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:01:24,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:01:24,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:01:24,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:01:24,521 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 [2018-12-24 14:01:24,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:01:24,585 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:24,639 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:24,679 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:24,710 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,056 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,181 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,198 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,214 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,282 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:25,283 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:01:25,332 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2018-12-24 14:01:25,334 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,405 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:25,406 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:01:25,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:25,461 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:25,462 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2018-12-24 14:01:25,463 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:25,527 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:25,527 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2018-12-24 14:01:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:25,555 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:25,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:25,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:25,596 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:25,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:25,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:25,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:25,597 INFO L87 Difference]: Start difference. First operand 59 states and 243 transitions. Second operand 8 states. [2018-12-24 14:01:26,295 WARN L181 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2018-12-24 14:01:26,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:26,805 INFO L93 Difference]: Finished difference Result 99 states and 302 transitions. [2018-12-24 14:01:26,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:26,805 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:01:26,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:26,807 INFO L225 Difference]: With dead ends: 99 [2018-12-24 14:01:26,807 INFO L226 Difference]: Without dead ends: 98 [2018-12-24 14:01:26,808 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 [2018-12-24 14:01:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-12-24 14:01:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2018-12-24 14:01:26,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-24 14:01:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 261 transitions. [2018-12-24 14:01:26,822 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 261 transitions. Word has length 4 [2018-12-24 14:01:26,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:26,822 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 261 transitions. [2018-12-24 14:01:26,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:26,822 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 261 transitions. [2018-12-24 14:01:26,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:26,823 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:26,823 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:26,823 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:26,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:26,824 INFO L82 PathProgramCache]: Analyzing trace with hash 941660, now seen corresponding path program 1 times [2018-12-24 14:01:26,824 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:26,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:26,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:26,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:26,825 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:26,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:26,900 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:26,900 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:26,900 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [35] [2018-12-24 14:01:26,903 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:26,903 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:26,912 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:26,914 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. [2018-12-24 14:01:26,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:26,914 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:26,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:26,914 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:26,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:26,924 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:26,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:26,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:01:26,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:01:26,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:01:26,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:01:26,983 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,985 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:01:26,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,001 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:01:27,007 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,010 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,014 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:01:27,030 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:01:27,030 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,086 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,129 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,165 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,194 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,217 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,233 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,280 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,324 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:27,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:27,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:27,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:27,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:27,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,688 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,689 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:27,691 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,734 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,771 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,810 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,849 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,888 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,956 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:27,956 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:01:28,010 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,011 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2018-12-24 14:01:28,012 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,072 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:28,073 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:01:28,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,123 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:28,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2018-12-24 14:01:28,125 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,191 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:28,191 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2018-12-24 14:01:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:28,401 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:28,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:28,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:28,818 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:28,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:28,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:28,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:28,819 INFO L87 Difference]: Start difference. First operand 61 states and 261 transitions. Second operand 8 states. [2018-12-24 14:01:29,326 WARN L181 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2018-12-24 14:01:30,267 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2018-12-24 14:01:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:30,639 INFO L93 Difference]: Finished difference Result 101 states and 320 transitions. [2018-12-24 14:01:30,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:30,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:01:30,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:30,641 INFO L225 Difference]: With dead ends: 101 [2018-12-24 14:01:30,641 INFO L226 Difference]: Without dead ends: 99 [2018-12-24 14:01:30,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-12-24 14:01:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2018-12-24 14:01:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-24 14:01:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 278 transitions. [2018-12-24 14:01:30,657 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 278 transitions. Word has length 4 [2018-12-24 14:01:30,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:30,657 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 278 transitions. [2018-12-24 14:01:30,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:30,657 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 278 transitions. [2018-12-24 14:01:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:30,658 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:30,658 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:30,659 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:30,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:30,659 INFO L82 PathProgramCache]: Analyzing trace with hash 941288, now seen corresponding path program 1 times [2018-12-24 14:01:30,659 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:30,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:30,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:30,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:30,660 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:30,991 WARN L181 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 14 [2018-12-24 14:01:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:31,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:31,183 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:31,183 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:31,183 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [35] [2018-12-24 14:01:31,187 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:31,187 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:31,193 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:31,193 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. [2018-12-24 14:01:31,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:31,194 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:31,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:31,199 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:31,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:31,221 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:31,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:31,424 WARN L181 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2018-12-24 14:01:31,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:31,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:31,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,528 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:31,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,591 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:31,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,758 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:31,875 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2018-12-24 14:01:31,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:31,890 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:31,930 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,024 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,063 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,104 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,145 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:01:32,202 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:01:32,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:01:32,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:01:32,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:01:32,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:01:32,238 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:01:32,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:01:32,281 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,334 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,374 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,437 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,462 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,482 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,499 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,515 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,583 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:32,584 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:01:32,631 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2018-12-24 14:01:32,633 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,695 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:32,695 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:01:32,721 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,727 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2018-12-24 14:01:32,730 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,797 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:32,798 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2018-12-24 14:01:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:32,820 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:32,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:32,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:32,910 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:32,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:32,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:32,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:32,910 INFO L87 Difference]: Start difference. First operand 62 states and 278 transitions. Second operand 8 states. [2018-12-24 14:01:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:33,548 INFO L93 Difference]: Finished difference Result 106 states and 350 transitions. [2018-12-24 14:01:33,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:33,548 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:01:33,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:33,550 INFO L225 Difference]: With dead ends: 106 [2018-12-24 14:01:33,550 INFO L226 Difference]: Without dead ends: 104 [2018-12-24 14:01:33,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:33,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-12-24 14:01:33,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2018-12-24 14:01:33,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-24 14:01:33,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 304 transitions. [2018-12-24 14:01:33,563 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 304 transitions. Word has length 4 [2018-12-24 14:01:33,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:33,563 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 304 transitions. [2018-12-24 14:01:33,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 304 transitions. [2018-12-24 14:01:33,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:33,564 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:33,564 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:33,564 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:33,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:33,565 INFO L82 PathProgramCache]: Analyzing trace with hash 941784, now seen corresponding path program 1 times [2018-12-24 14:01:33,565 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:33,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:33,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:33,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:33,566 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:33,794 WARN L181 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-12-24 14:01:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:33,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:33,806 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:33,806 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:33,806 INFO L207 CegarAbsIntRunner]: [0], [18], [30], [35] [2018-12-24 14:01:33,808 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:33,809 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:33,814 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:33,814 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. [2018-12-24 14:01:33,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:33,814 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:33,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:33,815 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:33,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:33,833 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:33,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:33,913 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:01:33,916 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:01:33,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:01:33,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,927 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,928 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:01:33,931 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,935 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,935 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:01:33,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:01:33,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:33,977 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:01:33,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:01:33,989 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,045 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,087 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,120 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,149 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,171 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,189 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,208 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,251 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:34,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,300 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:34,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,353 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:34,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,409 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:34,489 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,489 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,493 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,495 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,496 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:34,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,599 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:34,600 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,638 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,676 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,715 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,754 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,793 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,861 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:34,862 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:01:34,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2018-12-24 14:01:34,927 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,989 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:34,989 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:01:35,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,086 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,137 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,177 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,219 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,243 INFO L303 Elim1Store]: Index analysis took 230 ms [2018-12-24 14:01:35,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2018-12-24 14:01:35,244 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,993 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:35,993 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2018-12-24 14:01:36,192 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2018-12-24 14:01:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:36,194 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:36,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:36,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:36,593 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:36,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:36,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:36,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:36,594 INFO L87 Difference]: Start difference. First operand 65 states and 304 transitions. Second operand 8 states. [2018-12-24 14:01:37,023 WARN L181 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2018-12-24 14:01:37,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:37,627 INFO L93 Difference]: Finished difference Result 107 states and 376 transitions. [2018-12-24 14:01:37,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:37,628 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:01:37,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:37,630 INFO L225 Difference]: With dead ends: 107 [2018-12-24 14:01:37,630 INFO L226 Difference]: Without dead ends: 99 [2018-12-24 14:01:37,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:37,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-12-24 14:01:37,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2018-12-24 14:01:37,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-24 14:01:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 328 transitions. [2018-12-24 14:01:37,644 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 328 transitions. Word has length 4 [2018-12-24 14:01:37,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:37,645 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 328 transitions. [2018-12-24 14:01:37,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 328 transitions. [2018-12-24 14:01:37,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:37,646 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:37,646 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:37,646 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:37,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:37,646 INFO L82 PathProgramCache]: Analyzing trace with hash 930314, now seen corresponding path program 1 times [2018-12-24 14:01:37,646 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:37,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:37,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:37,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:37,647 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:37,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:37,749 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:37,749 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:37,750 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [35] [2018-12-24 14:01:37,750 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:37,750 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:37,754 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:37,754 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. [2018-12-24 14:01:37,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:37,755 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:37,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:37,755 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:37,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:37,765 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:37,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:37,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:37,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:37,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,892 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:37,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:37,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:38,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:38,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,135 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,136 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,139 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,140 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:38,141 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,180 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,220 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,261 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,306 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,347 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,399 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:01:38,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:01:38,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:01:38,409 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:01:38,412 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:01:38,416 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:01:38,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:01:38,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:01:38,441 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,756 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,797 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,829 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,852 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,872 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,887 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,903 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,969 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:38,970 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2018-12-24 14:01:39,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 135 [2018-12-24 14:01:39,015 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:01:39,235 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 12 dim-0 vars, and 2 xjuncts. [2018-12-24 14:01:39,236 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:201 [2018-12-24 14:01:39,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,289 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,291 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 12 case distinctions, treesize of input 111 treesize of output 165 [2018-12-24 14:01:39,349 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-12-24 14:01:39,366 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2018-12-24 14:01:40,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,423 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:40,424 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 126 [2018-12-24 14:01:40,425 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:40,824 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 2 dim-1 vars, End of recursive call: 49 dim-0 vars, and 8 xjuncts. [2018-12-24 14:01:40,824 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:218, output treesize:686 [2018-12-24 14:01:41,741 WARN L181 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 114 [2018-12-24 14:01:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:41,743 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:41,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:41,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2018-12-24 14:01:41,769 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:41,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:41,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:41,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:01:41,769 INFO L87 Difference]: Start difference. First operand 66 states and 328 transitions. Second operand 8 states. [2018-12-24 14:01:45,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:45,917 INFO L93 Difference]: Finished difference Result 155 states and 556 transitions. [2018-12-24 14:01:45,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:01:45,917 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:01:45,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:45,919 INFO L225 Difference]: With dead ends: 155 [2018-12-24 14:01:45,919 INFO L226 Difference]: Without dead ends: 152 [2018-12-24 14:01:45,920 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-12-24 14:01:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2018-12-24 14:01:45,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-24 14:01:45,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 438 transitions. [2018-12-24 14:01:45,940 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 438 transitions. Word has length 4 [2018-12-24 14:01:45,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:45,940 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 438 transitions. [2018-12-24 14:01:45,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:45,940 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 438 transitions. [2018-12-24 14:01:45,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:45,941 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:45,941 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:45,941 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:45,942 INFO L82 PathProgramCache]: Analyzing trace with hash 930440, now seen corresponding path program 1 times [2018-12-24 14:01:45,942 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:45,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:45,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:45,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:45,943 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:46,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:46,116 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:46,117 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:46,117 INFO L207 CegarAbsIntRunner]: [0], [6], [36], [37] [2018-12-24 14:01:46,123 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:46,123 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:46,126 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:46,126 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. [2018-12-24 14:01:46,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:46,126 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:46,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:46,127 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:46,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:46,136 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:46,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:46,167 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:01:46,170 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:01:46,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:01:46,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,181 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:01:46,186 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,187 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,190 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:01:46,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,202 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:01:46,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:01:46,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:01:46,227 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,284 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,327 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,361 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,389 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,412 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,432 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,450 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,493 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,494 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:46,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:46,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:46,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,651 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:46,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,727 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,730 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:46,820 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,821 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,822 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:46,831 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,866 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,903 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,940 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,979 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,018 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,085 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:47,086 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2018-12-24 14:01:47,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,119 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2018-12-24 14:01:47,120 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,183 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:47,183 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2018-12-24 14:01:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:47,203 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:47,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:47,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:01:47,232 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:47,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:01:47,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:01:47,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:01:47,233 INFO L87 Difference]: Start difference. First operand 78 states and 438 transitions. Second operand 6 states. [2018-12-24 14:01:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:47,560 INFO L93 Difference]: Finished difference Result 104 states and 471 transitions. [2018-12-24 14:01:47,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:01:47,560 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 14:01:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:47,562 INFO L225 Difference]: With dead ends: 104 [2018-12-24 14:01:47,562 INFO L226 Difference]: Without dead ends: 103 [2018-12-24 14:01:47,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:01:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-24 14:01:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2018-12-24 14:01:47,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-12-24 14:01:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2018-12-24 14:01:47,579 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2018-12-24 14:01:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:47,579 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2018-12-24 14:01:47,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:01:47,579 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2018-12-24 14:01:47,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:47,580 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:47,580 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:47,580 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:47,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:47,581 INFO L82 PathProgramCache]: Analyzing trace with hash 945816, now seen corresponding path program 1 times [2018-12-24 14:01:47,581 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:47,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:47,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:47,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:47,582 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:47,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:47,696 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:47,697 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:47,697 INFO L207 CegarAbsIntRunner]: [0], [22], [36], [37] [2018-12-24 14:01:47,699 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:47,699 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:47,701 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:47,702 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. [2018-12-24 14:01:47,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:47,702 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:47,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:47,703 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:47,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:47,712 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:47,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:47,722 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:01:47,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2018-12-24 14:01:47,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,734 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2018-12-24 14:01:47,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,748 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2018-12-24 14:01:47,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2018-12-24 14:01:47,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,769 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,771 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2018-12-24 14:01:47,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2018-12-24 14:01:47,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2018-12-24 14:01:47,799 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,853 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,896 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,926 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,952 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,974 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,992 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,010 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,047 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2018-12-24 14:01:48,068 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,070 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,071 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2018-12-24 14:01:48,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2018-12-24 14:01:48,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,177 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2018-12-24 14:01:48,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,244 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,245 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,248 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,249 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2018-12-24 14:01:48,333 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,334 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,335 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,338 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,342 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2018-12-24 14:01:48,345 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,380 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,416 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,452 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,488 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,527 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,592 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:48,592 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2018-12-24 14:01:48,622 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,623 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2018-12-24 14:01:48,623 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,683 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:48,684 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2018-12-24 14:01:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:48,702 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:48,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:48,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:01:48,733 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:48,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:01:48,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:01:48,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:01:48,733 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 6 states. [2018-12-24 14:01:49,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:49,101 INFO L93 Difference]: Finished difference Result 108 states and 483 transitions. [2018-12-24 14:01:49,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:01:49,101 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 14:01:49,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:49,103 INFO L225 Difference]: With dead ends: 108 [2018-12-24 14:01:49,103 INFO L226 Difference]: Without dead ends: 107 [2018-12-24 14:01:49,103 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:01:49,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-12-24 14:01:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2018-12-24 14:01:49,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-12-24 14:01:49,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2018-12-24 14:01:49,120 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2018-12-24 14:01:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:49,120 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2018-12-24 14:01:49,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:01:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2018-12-24 14:01:49,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:49,121 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:49,121 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:49,121 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:49,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:49,121 INFO L82 PathProgramCache]: Analyzing trace with hash 945008, now seen corresponding path program 1 times [2018-12-24 14:01:49,121 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:49,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:49,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:49,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:49,122 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:49,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:49,243 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:49,243 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:49,243 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [35] [2018-12-24 14:01:49,244 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:49,244 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:49,247 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:49,247 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. [2018-12-24 14:01:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:49,248 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:49,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:49,248 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:49,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:49,258 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:49,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:49,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:49,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,341 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:49,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:49,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:49,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,533 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,536 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:49,625 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,627 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,629 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,631 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,633 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:49,637 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:49,676 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:49,716 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:49,756 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:49,796 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:49,838 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:49,887 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:01:49,891 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:01:49,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:01:49,898 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:01:49,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:01:49,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:01:49,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:01:49,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:01:49,950 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,016 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,056 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,087 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,111 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,131 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,148 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,163 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,231 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:50,231 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:01:50,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,278 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2018-12-24 14:01:50,278 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,342 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:50,343 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:01:50,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,442 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,606 INFO L303 Elim1Store]: Index analysis took 233 ms [2018-12-24 14:01:50,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2018-12-24 14:01:50,608 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,770 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:50,770 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2018-12-24 14:01:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:50,790 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:50,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:50,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:01:50,836 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:50,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:50,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:50,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:01:50,837 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 8 states. [2018-12-24 14:01:52,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:52,182 INFO L93 Difference]: Finished difference Result 154 states and 652 transitions. [2018-12-24 14:01:52,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:01:52,185 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:01:52,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:52,186 INFO L225 Difference]: With dead ends: 154 [2018-12-24 14:01:52,186 INFO L226 Difference]: Without dead ends: 153 [2018-12-24 14:01:52,187 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:52,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-12-24 14:01:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2018-12-24 14:01:52,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-24 14:01:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 556 transitions. [2018-12-24 14:01:52,209 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 556 transitions. Word has length 4 [2018-12-24 14:01:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:52,209 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 556 transitions. [2018-12-24 14:01:52,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 556 transitions. [2018-12-24 14:01:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:52,210 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:52,210 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:52,210 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:52,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:52,211 INFO L82 PathProgramCache]: Analyzing trace with hash 945504, now seen corresponding path program 1 times [2018-12-24 14:01:52,211 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:52,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:52,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:52,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:52,212 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:52,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:52,381 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:52,381 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:52,381 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [35] [2018-12-24 14:01:52,384 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:52,384 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:52,386 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:52,387 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. [2018-12-24 14:01:52,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:52,387 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:52,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:52,388 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:52,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:52,399 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:52,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:52,438 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:01:52,443 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:01:52,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,450 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:01:52,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:01:52,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,468 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:01:52,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:01:52,484 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,487 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,489 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:01:52,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:01:52,535 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:52,590 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:52,634 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:52,669 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:52,696 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:52,719 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:52,737 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:52,754 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:52,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:52,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,838 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,839 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:52,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:52,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,948 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,949 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,950 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,951 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,952 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:53,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,030 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:53,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,126 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,128 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:53,132 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,166 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,203 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,242 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,280 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,319 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,387 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:53,388 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:01:53,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2018-12-24 14:01:53,434 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,496 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:53,496 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:01:53,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2018-12-24 14:01:53,530 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,597 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:53,598 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2018-12-24 14:01:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:53,618 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:53,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:53,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:01:53,671 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:53,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:53,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:53,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:01:53,672 INFO L87 Difference]: Start difference. First operand 92 states and 556 transitions. Second operand 8 states. [2018-12-24 14:01:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:54,869 INFO L93 Difference]: Finished difference Result 148 states and 688 transitions. [2018-12-24 14:01:54,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:54,869 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:01:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:54,871 INFO L225 Difference]: With dead ends: 148 [2018-12-24 14:01:54,871 INFO L226 Difference]: Without dead ends: 146 [2018-12-24 14:01:54,872 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:54,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-12-24 14:01:54,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2018-12-24 14:01:54,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-12-24 14:01:54,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 590 transitions. [2018-12-24 14:01:54,895 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 590 transitions. Word has length 4 [2018-12-24 14:01:54,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:54,896 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 590 transitions. [2018-12-24 14:01:54,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:54,896 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 590 transitions. [2018-12-24 14:01:54,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:54,897 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:54,897 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:54,897 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:54,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:54,897 INFO L82 PathProgramCache]: Analyzing trace with hash 933972, now seen corresponding path program 1 times [2018-12-24 14:01:54,897 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:54,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:54,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:54,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:54,898 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:55,044 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2018-12-24 14:01:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:55,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:55,068 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:55,068 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:55,069 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [35] [2018-12-24 14:01:55,070 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:55,070 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:55,072 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:55,072 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. [2018-12-24 14:01:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:55,073 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:55,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:55,073 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:55,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:55,082 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:55,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:55,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:01:55,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:01:55,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,128 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:01:55,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:01:55,139 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,141 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,144 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:01:55,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,154 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,154 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,157 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:01:55,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,164 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:01:55,183 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:01:55,184 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,241 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,283 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,316 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,345 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,368 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,388 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,404 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,450 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:55,493 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,495 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:55,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:55,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:55,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,687 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:55,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,781 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,788 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:55,788 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,824 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,863 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,902 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,941 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,980 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:56,048 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:56,049 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:01:56,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,100 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2018-12-24 14:01:56,100 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:56,164 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:56,164 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:01:56,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,194 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,199 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:56,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 141 [2018-12-24 14:01:56,200 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:56,267 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:56,267 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:82 [2018-12-24 14:01:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:56,286 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:56,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:56,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:56,327 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:56,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:56,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:56,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:56,328 INFO L87 Difference]: Start difference. First operand 103 states and 590 transitions. Second operand 8 states. [2018-12-24 14:01:56,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:56,806 INFO L93 Difference]: Finished difference Result 145 states and 646 transitions. [2018-12-24 14:01:56,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:56,807 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:01:56,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:56,808 INFO L225 Difference]: With dead ends: 145 [2018-12-24 14:01:56,809 INFO L226 Difference]: Without dead ends: 143 [2018-12-24 14:01:56,809 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:56,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-12-24 14:01:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2018-12-24 14:01:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-24 14:01:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 599 transitions. [2018-12-24 14:01:56,833 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 599 transitions. Word has length 4 [2018-12-24 14:01:56,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:56,833 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 599 transitions. [2018-12-24 14:01:56,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:56,834 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 599 transitions. [2018-12-24 14:01:56,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:56,834 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:56,834 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:56,835 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:56,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:56,835 INFO L82 PathProgramCache]: Analyzing trace with hash 938128, now seen corresponding path program 1 times [2018-12-24 14:01:56,835 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:56,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:56,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:56,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:56,836 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:56,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:56,986 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:56,986 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:56,986 INFO L207 CegarAbsIntRunner]: [0], [14], [36], [37] [2018-12-24 14:01:56,987 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:56,987 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:56,989 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:56,989 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. [2018-12-24 14:01:56,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:56,989 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:56,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:56,989 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:56,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:56,997 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:57,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:57,007 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:01:57,011 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2018-12-24 14:01:57,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,018 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2018-12-24 14:01:57,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2018-12-24 14:01:57,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,035 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2018-12-24 14:01:57,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,050 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2018-12-24 14:01:57,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,055 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2018-12-24 14:01:57,075 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2018-12-24 14:01:57,076 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,126 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,168 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,202 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,229 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,251 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,269 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,287 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,324 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2018-12-24 14:01:57,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2018-12-24 14:01:57,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2018-12-24 14:01:57,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2018-12-24 14:01:57,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,533 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2018-12-24 14:01:57,623 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,625 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,627 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,629 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,631 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,632 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,635 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2018-12-24 14:01:57,635 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,670 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,705 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,741 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,777 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,814 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,878 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:57,879 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2018-12-24 14:01:57,910 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2018-12-24 14:01:57,912 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,972 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:57,973 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2018-12-24 14:01:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:58,022 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:58,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:58,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:01:58,050 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:58,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:01:58,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:01:58,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:01:58,051 INFO L87 Difference]: Start difference. First operand 104 states and 599 transitions. Second operand 6 states. [2018-12-24 14:01:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:58,603 INFO L93 Difference]: Finished difference Result 124 states and 613 transitions. [2018-12-24 14:01:58,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:01:58,603 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 14:01:58,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:58,604 INFO L225 Difference]: With dead ends: 124 [2018-12-24 14:01:58,605 INFO L226 Difference]: Without dead ends: 123 [2018-12-24 14:01:58,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:01:58,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-12-24 14:01:58,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2018-12-24 14:01:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-24 14:01:58,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2018-12-24 14:01:58,628 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 4 [2018-12-24 14:01:58,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:58,628 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2018-12-24 14:01:58,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:01:58,629 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2018-12-24 14:01:58,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:58,629 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:58,629 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:58,630 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:58,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:58,630 INFO L82 PathProgramCache]: Analyzing trace with hash 937816, now seen corresponding path program 1 times [2018-12-24 14:01:58,630 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:58,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:58,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:58,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:58,631 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:58,804 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2018-12-24 14:01:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:58,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:58,915 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:58,915 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:58,916 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [35] [2018-12-24 14:01:58,917 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:58,917 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:58,919 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:58,919 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. [2018-12-24 14:01:58,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:58,919 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:58,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:58,920 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:58,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:58,934 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:58,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:58,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:01:58,982 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:01:58,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:01:58,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:01:59,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,002 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,004 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,006 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:01:59,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,010 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,010 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,014 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:01:59,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:01:59,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:01:59,037 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:59,094 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:59,138 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:59,174 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:59,201 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:59,223 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:59,243 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:59,259 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:59,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,303 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:59,348 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:59,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,400 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:59,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,461 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:59,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,533 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,540 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:59,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,631 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,632 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,633 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,638 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:59,640 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:59,676 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:59,713 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:59,752 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:59,790 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:59,828 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:59,896 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:59,897 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:01:59,945 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2018-12-24 14:01:59,947 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:00,011 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:00,011 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:02:00,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,043 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,087 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2018-12-24 14:02:00,135 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:00,597 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:00,598 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2018-12-24 14:02:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:00,619 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:00,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:00,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:02:00,669 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:00,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:02:00,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:02:00,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:02:00,670 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 8 states. [2018-12-24 14:02:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:01,536 INFO L93 Difference]: Finished difference Result 176 states and 800 transitions. [2018-12-24 14:02:01,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:02:01,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:02:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:01,537 INFO L225 Difference]: With dead ends: 176 [2018-12-24 14:02:01,538 INFO L226 Difference]: Without dead ends: 174 [2018-12-24 14:02:01,538 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:02:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-12-24 14:02:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2018-12-24 14:02:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-12-24 14:02:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2018-12-24 14:02:01,564 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2018-12-24 14:02:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:01,564 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2018-12-24 14:02:01,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:02:01,564 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2018-12-24 14:02:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:02:01,565 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:01,565 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:02:01,565 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:01,565 INFO L82 PathProgramCache]: Analyzing trace with hash 953504, now seen corresponding path program 1 times [2018-12-24 14:02:01,565 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:01,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:01,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:01,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:01,566 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:01,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:01,731 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:01,731 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:02:01,731 INFO L207 CegarAbsIntRunner]: [0], [30], [36], [37] [2018-12-24 14:02:01,732 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:01,732 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:01,734 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:01,734 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. [2018-12-24 14:02:01,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:01,735 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:01,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:01,735 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:01,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:01,751 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:01,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:01,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2018-12-24 14:02:01,977 WARN L181 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-12-24 14:02:01,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:01,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:01,982 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2018-12-24 14:02:02,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2018-12-24 14:02:02,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,084 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2018-12-24 14:02:02,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,154 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2018-12-24 14:02:02,240 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,241 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,244 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,247 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,248 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,249 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,251 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2018-12-24 14:02:02,253 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:02,288 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:02,326 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:02,364 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:02,402 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:02,444 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:02,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:02:02,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2018-12-24 14:02:02,504 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2018-12-24 14:02:02,508 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2018-12-24 14:02:02,511 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2018-12-24 14:02:02,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2018-12-24 14:02:02,523 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2018-12-24 14:02:02,536 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2018-12-24 14:02:02,537 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:02,592 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:02,630 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:02,660 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:02,683 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:02,701 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:02,717 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:02,733 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:02,797 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:02,798 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2018-12-24 14:02:02,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:02,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2018-12-24 14:02:02,835 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:02,894 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:02,895 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2018-12-24 14:02:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:02,945 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:02,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:02,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:02:02,972 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:02,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:02:02,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:02:02,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:02:02,973 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 6 states. [2018-12-24 14:02:03,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:03,261 INFO L93 Difference]: Finished difference Result 135 states and 696 transitions. [2018-12-24 14:02:03,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:02:03,264 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 14:02:03,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:03,265 INFO L225 Difference]: With dead ends: 135 [2018-12-24 14:02:03,265 INFO L226 Difference]: Without dead ends: 134 [2018-12-24 14:02:03,266 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:02:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-12-24 14:02:03,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2018-12-24 14:02:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-12-24 14:02:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2018-12-24 14:02:03,294 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2018-12-24 14:02:03,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:03,295 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2018-12-24 14:02:03,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:02:03,295 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2018-12-24 14:02:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:02:03,295 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:03,296 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:02:03,296 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:03,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:03,296 INFO L82 PathProgramCache]: Analyzing trace with hash 29600478, now seen corresponding path program 1 times [2018-12-24 14:02:03,296 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:03,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:03,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:03,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:03,297 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:03,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:03,533 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:03,533 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:02:03,534 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [35] [2018-12-24 14:02:03,535 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:03,535 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:03,537 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:03,537 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. [2018-12-24 14:02:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:03,538 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:03,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:03,538 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:03,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:03,546 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:03,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:03,687 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2018-12-24 14:02:03,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:02:03,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:02:03,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:02:03,702 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,703 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,705 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:02:03,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,714 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:02:03,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,720 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,720 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,721 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:02:03,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,730 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,731 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,734 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:02:03,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:03,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2018-12-24 14:02:03,748 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,823 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,869 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,906 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,933 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,958 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,978 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:03,997 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2018-12-24 14:02:04,095 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,097 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2018-12-24 14:02:04,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,154 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,156 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2018-12-24 14:02:04,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,228 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2018-12-24 14:02:04,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,306 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,307 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2018-12-24 14:02:04,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,440 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,441 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2018-12-24 14:02:04,563 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:02:04,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,573 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,575 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,576 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,578 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:04,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2018-12-24 14:02:04,580 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,633 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,688 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,744 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,800 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,857 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:04,914 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:05,005 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:05,005 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2018-12-24 14:02:05,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,045 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2018-12-24 14:02:05,046 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:05,138 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:05,138 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2018-12-24 14:02:05,183 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,183 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,185 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,186 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,187 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,188 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,192 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:05,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2018-12-24 14:02:05,194 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:05,287 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:05,287 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2018-12-24 14:02:05,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,348 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,353 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:05,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 169 [2018-12-24 14:02:05,363 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:05,453 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:05,453 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:89 [2018-12-24 14:02:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:05,480 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:05,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:05,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:02:05,537 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:05,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:02:05,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:02:05,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:02:05,538 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 10 states. [2018-12-24 14:02:06,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:06,568 INFO L93 Difference]: Finished difference Result 212 states and 968 transitions. [2018-12-24 14:02:06,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:02:06,568 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:02:06,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:06,571 INFO L225 Difference]: With dead ends: 212 [2018-12-24 14:02:06,571 INFO L226 Difference]: Without dead ends: 205 [2018-12-24 14:02:06,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:02:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-12-24 14:02:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2018-12-24 14:02:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-12-24 14:02:06,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 789 transitions. [2018-12-24 14:02:06,602 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 789 transitions. Word has length 5 [2018-12-24 14:02:06,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:06,602 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 789 transitions. [2018-12-24 14:02:06,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:02:06,602 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 789 transitions. [2018-12-24 14:02:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:02:06,603 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:06,603 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:02:06,603 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:06,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:06,604 INFO L82 PathProgramCache]: Analyzing trace with hash 29600106, now seen corresponding path program 1 times [2018-12-24 14:02:06,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:06,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:06,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:06,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:06,605 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:06,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:06,742 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:06,742 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:02:06,742 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [35] [2018-12-24 14:02:06,743 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:06,743 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:06,746 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:06,746 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. [2018-12-24 14:02:06,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:06,746 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:06,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:06,747 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:06,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:06,758 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:06,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:06,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:06,801 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2018-12-24 14:02:06,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:06,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:06,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2018-12-24 14:02:06,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:06,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:06,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:06,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:06,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2018-12-24 14:02:06,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:06,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:06,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:06,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,000 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2018-12-24 14:02:07,087 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,092 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,094 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2018-12-24 14:02:07,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2018-12-24 14:02:07,337 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:02:07,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,348 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,353 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:07,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2018-12-24 14:02:07,361 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:07,421 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:07,487 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:07,560 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:07,630 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:07,698 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:07,772 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:07,857 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:02:07,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:02:07,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:02:07,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:02:07,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:02:07,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:02:07,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:02:07,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2018-12-24 14:02:07,881 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:07,951 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:07,991 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:08,023 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:08,047 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:08,068 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:08,085 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:08,101 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:08,192 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:08,193 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2018-12-24 14:02:08,230 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,231 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2018-12-24 14:02:08,232 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:08,321 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:08,322 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2018-12-24 14:02:08,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,369 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:08,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2018-12-24 14:02:08,371 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:08,463 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:08,463 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2018-12-24 14:02:08,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,510 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:08,520 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:08,521 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2018-12-24 14:02:08,521 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:08,610 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:08,610 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2018-12-24 14:02:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:08,640 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:08,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:08,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:02:08,696 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:08,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:02:08,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:02:08,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:02:08,697 INFO L87 Difference]: Start difference. First operand 122 states and 789 transitions. Second operand 10 states. [2018-12-24 14:02:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:12,233 INFO L93 Difference]: Finished difference Result 169 states and 850 transitions. [2018-12-24 14:02:12,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:02:12,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:02:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:12,236 INFO L225 Difference]: With dead ends: 169 [2018-12-24 14:02:12,236 INFO L226 Difference]: Without dead ends: 168 [2018-12-24 14:02:12,237 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:02:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-12-24 14:02:12,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2018-12-24 14:02:12,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-12-24 14:02:12,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 762 transitions. [2018-12-24 14:02:12,274 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 762 transitions. Word has length 5 [2018-12-24 14:02:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:12,274 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 762 transitions. [2018-12-24 14:02:12,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:02:12,274 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 762 transitions. [2018-12-24 14:02:12,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:02:12,275 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:12,275 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:02:12,275 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:12,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:12,276 INFO L82 PathProgramCache]: Analyzing trace with hash 29600602, now seen corresponding path program 1 times [2018-12-24 14:02:12,276 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:12,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:12,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:12,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:12,277 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:12,664 WARN L181 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2018-12-24 14:02:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:12,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:12,703 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:12,704 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:02:12,704 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [35] [2018-12-24 14:02:12,707 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:12,707 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:12,709 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:12,709 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. [2018-12-24 14:02:12,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:12,710 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:12,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:12,710 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:12,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:12,726 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:12,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:12,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,766 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2018-12-24 14:02:12,817 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2018-12-24 14:02:12,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2018-12-24 14:02:12,944 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,947 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,948 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,949 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,951 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:12,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2018-12-24 14:02:13,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,038 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2018-12-24 14:02:13,147 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2018-12-24 14:02:13,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,154 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,156 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,157 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,162 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2018-12-24 14:02:13,280 WARN L181 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-12-24 14:02:13,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,286 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,289 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,291 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,292 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:13,296 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2018-12-24 14:02:13,297 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,352 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,409 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,468 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,526 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,586 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,644 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:02:13,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:02:13,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:02:13,724 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:02:13,727 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:02:13,730 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:02:13,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:02:13,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2018-12-24 14:02:13,739 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,811 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,852 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,883 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,908 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,928 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,945 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:13,961 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:14,053 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:14,053 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2018-12-24 14:02:14,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2018-12-24 14:02:14,091 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:14,183 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:14,183 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2018-12-24 14:02:14,268 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,286 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,288 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:14,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2018-12-24 14:02:14,290 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:14,382 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:14,382 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2018-12-24 14:02:14,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,451 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:14,462 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:14,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2018-12-24 14:02:14,464 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:14,553 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:14,553 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2018-12-24 14:02:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:14,799 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:14,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:14,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:02:14,860 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:14,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:02:14,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:02:14,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:02:14,860 INFO L87 Difference]: Start difference. First operand 119 states and 762 transitions. Second operand 10 states. [2018-12-24 14:02:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:16,324 INFO L93 Difference]: Finished difference Result 176 states and 845 transitions. [2018-12-24 14:02:16,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:02:16,324 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:02:16,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:16,326 INFO L225 Difference]: With dead ends: 176 [2018-12-24 14:02:16,326 INFO L226 Difference]: Without dead ends: 172 [2018-12-24 14:02:16,327 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:02:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-12-24 14:02:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2018-12-24 14:02:16,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-12-24 14:02:16,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 788 transitions. [2018-12-24 14:02:16,354 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 788 transitions. Word has length 5 [2018-12-24 14:02:16,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:16,355 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 788 transitions. [2018-12-24 14:02:16,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:02:16,355 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 788 transitions. [2018-12-24 14:02:16,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:02:16,355 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:16,355 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:02:16,356 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:16,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:16,356 INFO L82 PathProgramCache]: Analyzing trace with hash 29588822, now seen corresponding path program 1 times [2018-12-24 14:02:16,356 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:16,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:16,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:16,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:16,357 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:16,593 WARN L181 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2018-12-24 14:02:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:16,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:16,637 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:16,637 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:02:16,637 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [35] [2018-12-24 14:02:16,638 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:16,638 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:16,640 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:16,641 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. [2018-12-24 14:02:16,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:16,641 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:16,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:16,641 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:16,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:16,651 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:16,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:16,689 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:02:16,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,733 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:02:16,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:02:16,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,843 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:02:16,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:16,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:02:17,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,023 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:02:17,024 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,064 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,104 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,143 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,184 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,225 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,276 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:02:17,296 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:02:17,307 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:02:17,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:02:17,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:02:17,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:02:17,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:02:17,332 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:02:17,333 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,386 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,426 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,457 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,481 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,501 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,518 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,533 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:17,601 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:17,601 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:02:17,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:17,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2018-12-24 14:02:17,700 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2018-12-24 14:02:17,736 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2018-12-24 14:02:19,224 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2018-12-24 14:02:19,225 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:902 [2018-12-24 14:02:20,006 WARN L181 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 459 DAG size of output: 181 [2018-12-24 14:02:20,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,019 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 120 treesize of output 162 [2018-12-24 14:02:20,020 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:20,262 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,263 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,267 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:20,268 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 [2018-12-24 14:02:20,269 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:20,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 174 [2018-12-24 14:02:20,478 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:20,685 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2018-12-24 14:02:20,685 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:369, output treesize:277 [2018-12-24 14:02:20,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,849 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,850 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,851 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,852 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,857 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:20,860 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:20,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 169 [2018-12-24 14:02:20,862 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:21,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,085 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 156 [2018-12-24 14:02:21,086 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:21,259 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,261 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,262 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,263 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,268 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,275 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:21,277 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 152 [2018-12-24 14:02:21,278 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:21,442 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2018-12-24 14:02:21,443 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:237 [2018-12-24 14:02:21,778 WARN L181 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2018-12-24 14:02:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:21,780 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:21,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:21,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-12-24 14:02:21,823 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:21,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:02:21,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:02:21,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:02:21,824 INFO L87 Difference]: Start difference. First operand 125 states and 788 transitions. Second operand 10 states. [2018-12-24 14:02:22,256 WARN L181 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 70 [2018-12-24 14:02:33,826 WARN L181 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 147 [2018-12-24 14:02:35,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:35,584 INFO L93 Difference]: Finished difference Result 235 states and 1248 transitions. [2018-12-24 14:02:35,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-24 14:02:35,585 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:02:35,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:35,587 INFO L225 Difference]: With dead ends: 235 [2018-12-24 14:02:35,587 INFO L226 Difference]: Without dead ends: 230 [2018-12-24 14:02:35,587 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 [2018-12-24 14:02:35,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-12-24 14:02:35,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 145. [2018-12-24 14:02:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-12-24 14:02:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 973 transitions. [2018-12-24 14:02:35,627 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 973 transitions. Word has length 5 [2018-12-24 14:02:35,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:35,628 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 973 transitions. [2018-12-24 14:02:35,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:02:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 973 transitions. [2018-12-24 14:02:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:02:35,628 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:35,629 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:02:35,629 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:35,629 INFO L82 PathProgramCache]: Analyzing trace with hash 29589382, now seen corresponding path program 1 times [2018-12-24 14:02:35,629 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:35,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:35,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:35,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:35,630 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:02:35,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:35,733 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:35,734 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:02:35,734 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [36], [37] [2018-12-24 14:02:35,735 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:35,735 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:35,737 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:35,737 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. [2018-12-24 14:02:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:35,737 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:35,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:35,738 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 [2018-12-24 14:02:35,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:35,745 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:35,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:35,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:35,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:02:35,820 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:35,822 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:35,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:02:35,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:35,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:35,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:35,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:35,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:02:35,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:35,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:35,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:35,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:35,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:35,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:35,935 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 [2018-12-24 14:02:36,004 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,013 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 [2018-12-24 14:02:36,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,111 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 [2018-12-24 14:02:36,112 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,152 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,192 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,231 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,272 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,312 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2018-12-24 14:02:36,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2018-12-24 14:02:36,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2018-12-24 14:02:36,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2018-12-24 14:02:36,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:02:36,379 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2018-12-24 14:02:36,384 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2018-12-24 14:02:36,396 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2018-12-24 14:02:36,397 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,449 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,489 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,520 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,544 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,563 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,580 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,596 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:36,664 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. [2018-12-24 14:02:36,664 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2018-12-24 14:02:36,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:36,899 INFO L303 Elim1Store]: Index analysis took 210 ms [2018-12-24 14:02:36,956 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2018-12-24 14:02:36,956 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2018-12-24 14:02:36,984 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2018-12-24 14:02:38,445 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2018-12-24 14:02:38,445 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:900 [2018-12-24 14:02:39,153 WARN L181 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 177 [2018-12-24 14:02:39,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,164 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,167 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 124 treesize of output 182 [2018-12-24 14:02:39,167 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:39,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,435 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:39,436 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 158 [2018-12-24 14:02:39,437 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:39,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,643 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,644 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,645 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:39,649 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 178 [2018-12-24 14:02:39,650 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:39,861 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2018-12-24 14:02:39,862 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:361, output treesize:277 [2018-12-24 14:02:41,726 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2018-12-24 14:02:41,928 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:41,929 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:621) 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 [2018-12-24 14:02:41,934 INFO L168 Benchmark]: Toolchain (without parser) took 160624.26 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 1.0 GB). Free memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: -549.9 MB). Peak memory consumption was 459.3 MB. Max. memory is 7.1 GB. [2018-12-24 14:02:41,934 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:02:41,934 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:02:41,935 INFO L168 Benchmark]: Boogie Preprocessor took 25.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:02:41,935 INFO L168 Benchmark]: RCFGBuilder took 446.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-24 14:02:41,935 INFO L168 Benchmark]: TraceAbstraction took 160073.54 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 1.0 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -571.1 MB). Peak memory consumption was 438.2 MB. Max. memory is 7.1 GB. [2018-12-24 14:02:41,937 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 73.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 446.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 160073.54 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 1.0 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -571.1 MB). Peak memory consumption was 438.2 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...