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_oct.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-1ae3202 [2019-03-04 16:39:01,298 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-03-04 16:39:01,300 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-03-04 16:39:01,312 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-03-04 16:39:01,312 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-03-04 16:39:01,313 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-03-04 16:39:01,314 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-03-04 16:39:01,316 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-03-04 16:39:01,318 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-03-04 16:39:01,319 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-03-04 16:39:01,320 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-03-04 16:39:01,321 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-03-04 16:39:01,322 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-03-04 16:39:01,323 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-03-04 16:39:01,324 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-03-04 16:39:01,325 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-03-04 16:39:01,325 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-03-04 16:39:01,327 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-03-04 16:39:01,329 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-03-04 16:39:01,331 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-03-04 16:39:01,332 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-03-04 16:39:01,334 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-03-04 16:39:01,336 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-03-04 16:39:01,336 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-03-04 16:39:01,337 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-03-04 16:39:01,337 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-03-04 16:39:01,338 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-03-04 16:39:01,339 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-03-04 16:39:01,340 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-03-04 16:39:01,341 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-03-04 16:39:01,341 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-03-04 16:39:01,342 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-03-04 16:39:01,342 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-03-04 16:39:01,343 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-03-04 16:39:01,344 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-03-04 16:39:01,344 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-03-04 16:39:01,345 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_oct.epf [2019-03-04 16:39:01,357 INFO L110 SettingsManager]: Loading preferences was successful [2019-03-04 16:39:01,358 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-03-04 16:39:01,358 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-03-04 16:39:01,359 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-03-04 16:39:01,359 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-03-04 16:39:01,359 INFO L133 SettingsManager]: * User list type=DISABLED [2019-03-04 16:39:01,359 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-03-04 16:39:01,359 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-03-04 16:39:01,360 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-03-04 16:39:01,360 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-03-04 16:39:01,360 INFO L133 SettingsManager]: * Abstract domain=OctagonDomain [2019-03-04 16:39:01,360 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-03-04 16:39:01,360 INFO L133 SettingsManager]: * Interval Domain=false [2019-03-04 16:39:01,361 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-03-04 16:39:01,361 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-03-04 16:39:01,361 INFO L133 SettingsManager]: * Use SBE=true [2019-03-04 16:39:01,362 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-03-04 16:39:01,362 INFO L133 SettingsManager]: * sizeof long=4 [2019-03-04 16:39:01,362 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-03-04 16:39:01,362 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-03-04 16:39:01,362 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-03-04 16:39:01,363 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-03-04 16:39:01,363 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-03-04 16:39:01,363 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-03-04 16:39:01,363 INFO L133 SettingsManager]: * sizeof long double=12 [2019-03-04 16:39:01,363 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-03-04 16:39:01,363 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-03-04 16:39:01,364 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-03-04 16:39:01,364 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-03-04 16:39:01,364 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-03-04 16:39:01,364 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-03-04 16:39:01,365 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-03-04 16:39:01,365 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-03-04 16:39:01,365 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-03-04 16:39:01,365 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-03-04 16:39:01,365 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-03-04 16:39:01,365 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-03-04 16:39:01,366 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-03-04 16:39:01,366 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-03-04 16:39:01,396 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-03-04 16:39:01,409 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-03-04 16:39:01,413 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-03-04 16:39:01,415 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-03-04 16:39:01,415 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-03-04 16:39:01,416 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl [2019-03-04 16:39:01,416 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl' [2019-03-04 16:39:01,457 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-03-04 16:39:01,459 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-03-04 16:39:01,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-03-04 16:39:01,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-03-04 16:39:01,460 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-03-04 16:39:01,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:39:01" (1/1) ... [2019-03-04 16:39:01,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:39:01" (1/1) ... [2019-03-04 16:39:01,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-03-04 16:39:01,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-03-04 16:39:01,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-03-04 16:39:01,511 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-03-04 16:39:01,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:39:01" (1/1) ... [2019-03-04 16:39:01,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:39:01" (1/1) ... [2019-03-04 16:39:01,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:39:01" (1/1) ... [2019-03-04 16:39:01,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:39:01" (1/1) ... [2019-03-04 16:39:01,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:39:01" (1/1) ... [2019-03-04 16:39:01,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:39:01" (1/1) ... [2019-03-04 16:39:01,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:39:01" (1/1) ... [2019-03-04 16:39:01,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-03-04 16:39:01,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-03-04 16:39:01,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-03-04 16:39:01,544 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-03-04 16:39:01,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:39:01" (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 [2019-03-04 16:39:01,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-03-04 16:39:01,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-03-04 16:39:01,961 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-03-04 16:39:01,962 INFO L286 CfgBuilder]: Removed 17 assue(true) statements. [2019-03-04 16:39:01,963 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.03 04:39:01 BoogieIcfgContainer [2019-03-04 16:39:01,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-03-04 16:39:01,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-03-04 16:39:01,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-03-04 16:39:01,967 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-03-04 16:39:01,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:39:01" (1/2) ... [2019-03-04 16:39:01,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5592fce7 and model type speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 04:39:01, skipping insertion in model container [2019-03-04 16:39:01,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.03 04:39:01" (2/2) ... [2019-03-04 16:39:01,970 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-7-limited.bpl [2019-03-04 16:39:01,978 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-03-04 16:39:01,986 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-03-04 16:39:02,000 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-03-04 16:39:02,025 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-03-04 16:39:02,025 INFO L383 AbstractCegarLoop]: Hoare is true [2019-03-04 16:39:02,025 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-03-04 16:39:02,025 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-03-04 16:39:02,025 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-03-04 16:39:02,026 INFO L387 AbstractCegarLoop]: Difference is false [2019-03-04 16:39:02,026 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-03-04 16:39:02,026 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-03-04 16:39:02,038 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-03-04 16:39:02,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-03-04 16:39:02,044 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:39:02,045 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-03-04 16:39:02,048 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:39:02,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:02,053 INFO L82 PathProgramCache]: Analyzing trace with hash 992, now seen corresponding path program 1 times [2019-03-04 16:39:02,056 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:39:02,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:02,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:02,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:02,098 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:39:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:02,263 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-03-04 16:39:02,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-03-04 16:39:02,264 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-03-04 16:39:02,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-03-04 16:39:02,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-03-04 16:39:02,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-03-04 16:39:02,282 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-03-04 16:39:02,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:39:02,484 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2019-03-04 16:39:02,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-03-04 16:39:02,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-03-04 16:39:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:39:02,499 INFO L225 Difference]: With dead ends: 33 [2019-03-04 16:39:02,500 INFO L226 Difference]: Without dead ends: 28 [2019-03-04 16:39:02,503 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-03-04 16:39:02,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-03-04 16:39:02,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2019-03-04 16:39:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-03-04 16:39:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 29 transitions. [2019-03-04 16:39:02,538 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 29 transitions. Word has length 2 [2019-03-04 16:39:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:39:02,540 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 29 transitions. [2019-03-04 16:39:02,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-03-04 16:39:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 29 transitions. [2019-03-04 16:39:02,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-03-04 16:39:02,541 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:39:02,541 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-03-04 16:39:02,541 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:39:02,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:02,542 INFO L82 PathProgramCache]: Analyzing trace with hash 30816, now seen corresponding path program 1 times [2019-03-04 16:39:02,542 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:39:02,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:02,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:02,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:02,544 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:39:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:02,638 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-03-04 16:39:02,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-03-04 16:39:02,638 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-03-04 16:39:02,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-03-04 16:39:02,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-03-04 16:39:02,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-03-04 16:39:02,641 INFO L87 Difference]: Start difference. First operand 16 states and 29 transitions. Second operand 3 states. [2019-03-04 16:39:03,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:39:03,054 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2019-03-04 16:39:03,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-03-04 16:39:03,055 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-03-04 16:39:03,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:39:03,056 INFO L225 Difference]: With dead ends: 28 [2019-03-04 16:39:03,056 INFO L226 Difference]: Without dead ends: 27 [2019-03-04 16:39:03,057 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-03-04 16:39:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-03-04 16:39:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2019-03-04 16:39:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-03-04 16:39:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 30 transitions. [2019-03-04 16:39:03,062 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 30 transitions. Word has length 3 [2019-03-04 16:39:03,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:39:03,063 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 30 transitions. [2019-03-04 16:39:03,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-03-04 16:39:03,063 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 30 transitions. [2019-03-04 16:39:03,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-03-04 16:39:03,063 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:39:03,064 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-03-04 16:39:03,064 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:39:03,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:03,065 INFO L82 PathProgramCache]: Analyzing trace with hash 30380, now seen corresponding path program 1 times [2019-03-04 16:39:03,065 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:39:03,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:03,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:03,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:03,066 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:39:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:03,299 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2019-03-04 16:39:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:03,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:03,331 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:39:03,335 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-03-04 16:39:03,338 INFO L207 CegarAbsIntRunner]: [0], [18], [31] [2019-03-04 16:39:03,387 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:39:03,387 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:39:03,447 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:39:03,448 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-03-04 16:39:03,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:03,455 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:39:03,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:03,456 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-03-04 16:39:03,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:03,466 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:39:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:03,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 13 conjunts are in the unsatisfiable core [2019-03-04 16:39:03,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:39:03,627 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,630 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,632 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,635 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,652 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,674 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,699 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,709 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-03-04 16:39:03,710 INFO L309 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:03,724 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:03,741 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:03,805 INFO L453 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 24 treesize of output 27 [2019-03-04 16:39:03,856 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,858 INFO L453 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 27 treesize of output 29 [2019-03-04 16:39:03,918 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,933 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,936 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,938 INFO L453 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 29 treesize of output 31 [2019-03-04 16:39:03,951 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,953 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,954 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,956 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,957 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,964 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,966 INFO L453 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 31 treesize of output 33 [2019-03-04 16:39:03,987 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,990 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,993 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,996 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:03,999 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,005 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,006 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,007 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,008 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,009 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,013 INFO L453 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 33 treesize of output 35 [2019-03-04 16:39:04,028 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,029 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,029 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,030 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,032 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,033 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,035 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,039 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,042 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,045 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,048 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,049 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,050 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,054 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,055 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,057 INFO L453 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 35 treesize of output 37 [2019-03-04 16:39:04,076 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,079 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,082 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,083 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,085 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,102 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,125 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,139 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,140 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,143 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,145 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,146 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,147 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,149 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,150 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,153 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,155 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,156 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,157 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,159 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,161 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,164 INFO L453 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2019-03-04 16:39:04,166 INFO L309 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,252 INFO L309 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,268 INFO L309 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,309 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,393 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,587 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,640 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,682 INFO L309 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:04,683 INFO L209 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:71, output treesize:54 [2019-03-04 16:39:04,754 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,755 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,756 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,757 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,759 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,760 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,761 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,763 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,765 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,766 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,768 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,770 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,772 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,774 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,777 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,781 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,786 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,787 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,788 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,788 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,789 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,792 INFO L453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-03-04 16:39:04,793 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,862 INFO L309 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:04,862 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:56 [2019-03-04 16:39:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:06,107 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:39:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:06,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:39:06,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-03-04 16:39:06,146 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:39:06,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-03-04 16:39:06,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-03-04 16:39:06,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-03-04 16:39:06,147 INFO L87 Difference]: Start difference. First operand 17 states and 30 transitions. Second operand 6 states. [2019-03-04 16:39:26,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:39:26,007 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2019-03-04 16:39:26,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-03-04 16:39:26,008 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-03-04 16:39:26,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:39:26,009 INFO L225 Difference]: With dead ends: 54 [2019-03-04 16:39:26,009 INFO L226 Difference]: Without dead ends: 52 [2019-03-04 16:39:26,010 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-03-04 16:39:26,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-03-04 16:39:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 20. [2019-03-04 16:39:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-03-04 16:39:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 41 transitions. [2019-03-04 16:39:26,017 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 41 transitions. Word has length 3 [2019-03-04 16:39:26,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:39:26,017 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 41 transitions. [2019-03-04 16:39:26,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-03-04 16:39:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 41 transitions. [2019-03-04 16:39:26,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-03-04 16:39:26,018 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:39:26,018 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-03-04 16:39:26,018 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:39:26,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:26,019 INFO L82 PathProgramCache]: Analyzing trace with hash 30008, now seen corresponding path program 1 times [2019-03-04 16:39:26,019 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:39:26,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:26,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:26,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:26,021 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:39:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:26,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:26,115 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:39:26,115 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-03-04 16:39:26,115 INFO L207 CegarAbsIntRunner]: [0], [6], [31] [2019-03-04 16:39:26,117 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:39:26,117 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:39:26,127 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:39:26,127 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-03-04 16:39:26,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:26,128 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:39:26,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:26,128 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-03-04 16:39:26,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:26,148 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:39:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:26,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 13 conjunts are in the unsatisfiable core [2019-03-04 16:39:26,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:39:26,194 INFO L453 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 24 treesize of output 27 [2019-03-04 16:39:26,201 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,202 INFO L453 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 27 treesize of output 29 [2019-03-04 16:39:26,212 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,214 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,216 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,218 INFO L453 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 29 treesize of output 31 [2019-03-04 16:39:26,246 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,248 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,249 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,251 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,266 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,271 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,272 INFO L453 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 31 treesize of output 33 [2019-03-04 16:39:26,287 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,289 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,291 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,293 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,302 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,304 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,306 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,307 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,308 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,309 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,312 INFO L453 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 33 treesize of output 35 [2019-03-04 16:39:26,338 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,340 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,342 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,344 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,351 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,353 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,355 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,357 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,358 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,359 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,360 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,362 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,364 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,365 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,367 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,371 INFO L453 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 35 treesize of output 37 [2019-03-04 16:39:26,386 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,390 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,393 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,399 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,402 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,403 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,405 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,407 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,408 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,412 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,413 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,415 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,416 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,418 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,432 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,433 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,435 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,437 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,439 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,464 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,466 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,468 INFO L453 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2019-03-04 16:39:26,468 INFO L309 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:26,490 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:26,510 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:26,532 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:26,552 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:26,573 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:26,592 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:26,640 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,641 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,642 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,643 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,644 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,648 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,677 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,678 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-03-04 16:39:26,679 INFO L309 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:26,681 INFO L309 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:26,682 INFO L309 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:26,716 INFO L309 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:26,716 INFO L209 ElimStorePlain]: Needed 11 recursive calls to eliminate 8 variables, input treesize:71, output treesize:54 [2019-03-04 16:39:26,792 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,798 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,799 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,799 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,800 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,801 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,802 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,803 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,804 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,806 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,807 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,808 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,809 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,811 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,812 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,813 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,814 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,815 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,817 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,822 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,822 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:26,824 INFO L453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-03-04 16:39:26,824 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:26,856 INFO L309 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:26,856 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-03-04 16:39:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:26,889 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:39:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:26,942 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-03-04 16:39:26,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2019-03-04 16:39:26,943 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-03-04 16:39:26,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-03-04 16:39:26,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-03-04 16:39:26,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-03-04 16:39:26,944 INFO L87 Difference]: Start difference. First operand 20 states and 41 transitions. Second operand 4 states. [2019-03-04 16:39:27,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:39:27,018 INFO L93 Difference]: Finished difference Result 25 states and 67 transitions. [2019-03-04 16:39:27,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-03-04 16:39:27,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-03-04 16:39:27,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:39:27,020 INFO L225 Difference]: With dead ends: 25 [2019-03-04 16:39:27,020 INFO L226 Difference]: Without dead ends: 24 [2019-03-04 16:39:27,021 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-03-04 16:39:27,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-03-04 16:39:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-03-04 16:39:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-03-04 16:39:27,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 66 transitions. [2019-03-04 16:39:27,028 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 66 transitions. Word has length 3 [2019-03-04 16:39:27,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:39:27,028 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 66 transitions. [2019-03-04 16:39:27,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-03-04 16:39:27,028 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 66 transitions. [2019-03-04 16:39:27,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-03-04 16:39:27,029 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:39:27,029 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-03-04 16:39:27,029 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:39:27,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:27,030 INFO L82 PathProgramCache]: Analyzing trace with hash 30132, now seen corresponding path program 1 times [2019-03-04 16:39:27,030 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:39:27,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:27,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:27,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:27,031 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:39:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:27,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:27,149 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:39:27,149 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-03-04 16:39:27,149 INFO L207 CegarAbsIntRunner]: [0], [10], [31] [2019-03-04 16:39:27,152 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:39:27,152 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:39:27,160 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:39:27,160 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-03-04 16:39:27,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:27,161 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:39:27,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:27,161 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-03-04 16:39:27,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:27,171 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:39:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:27,179 WARN L254 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 15 conjunts are in the unsatisfiable core [2019-03-04 16:39:27,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:39:27,189 INFO L453 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 24 treesize of output 27 [2019-03-04 16:39:27,203 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,204 INFO L453 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 27 treesize of output 29 [2019-03-04 16:39:27,211 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,213 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,215 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,216 INFO L453 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 29 treesize of output 31 [2019-03-04 16:39:27,226 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,227 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,228 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,232 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,233 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,235 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,236 INFO L453 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 31 treesize of output 33 [2019-03-04 16:39:27,244 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,246 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,248 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,250 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,252 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,254 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,256 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,258 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,260 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,262 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,265 INFO L453 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 33 treesize of output 35 [2019-03-04 16:39:27,310 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,320 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,322 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,324 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,326 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,329 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,330 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,331 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,332 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,334 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,335 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,337 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,338 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,340 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,341 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,344 INFO L453 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 35 treesize of output 37 [2019-03-04 16:39:27,357 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,358 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,360 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,361 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,363 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,364 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,366 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,384 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,392 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,393 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,394 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,395 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,396 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,398 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,399 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,401 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,402 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,404 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,405 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,407 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,408 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,411 INFO L453 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2019-03-04 16:39:27,412 INFO L309 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:27,450 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:27,468 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:27,491 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:27,511 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:27,533 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:27,550 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:27,600 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,601 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,602 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,604 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,605 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,615 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,616 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,619 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,625 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,626 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,627 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,628 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2019-03-04 16:39:27,629 INFO L309 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:27,632 INFO L309 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:27,633 INFO L309 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:27,635 INFO L309 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:27,666 INFO L309 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:27,667 INFO L209 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:82, output treesize:54 [2019-03-04 16:39:27,755 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,775 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,777 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,779 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,781 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,782 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,782 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,783 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,784 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,785 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,786 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,787 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,788 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,789 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,791 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,792 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,793 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,794 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,795 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,797 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,798 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:27,801 INFO L453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-03-04 16:39:27,802 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:27,829 INFO L309 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:27,830 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:56 [2019-03-04 16:39:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:28,973 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:39:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:29,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:39:29,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-03-04 16:39:29,010 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:39:29,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-03-04 16:39:29,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-03-04 16:39:29,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-03-04 16:39:29,011 INFO L87 Difference]: Start difference. First operand 23 states and 66 transitions. Second operand 6 states. [2019-03-04 16:39:47,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:39:47,882 INFO L93 Difference]: Finished difference Result 57 states and 111 transitions. [2019-03-04 16:39:47,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-03-04 16:39:47,882 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-03-04 16:39:47,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:39:47,884 INFO L225 Difference]: With dead ends: 57 [2019-03-04 16:39:47,885 INFO L226 Difference]: Without dead ends: 56 [2019-03-04 16:39:47,885 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-03-04 16:39:47,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-03-04 16:39:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 25. [2019-03-04 16:39:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-03-04 16:39:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 82 transitions. [2019-03-04 16:39:47,892 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 82 transitions. Word has length 3 [2019-03-04 16:39:47,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:39:47,893 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 82 transitions. [2019-03-04 16:39:47,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-03-04 16:39:47,893 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 82 transitions. [2019-03-04 16:39:47,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-03-04 16:39:47,893 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:39:47,894 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-03-04 16:39:47,894 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:39:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:47,894 INFO L82 PathProgramCache]: Analyzing trace with hash 30628, now seen corresponding path program 1 times [2019-03-04 16:39:47,894 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:39:47,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:47,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:47,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:47,896 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:39:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:48,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:48,006 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:39:48,006 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-03-04 16:39:48,006 INFO L207 CegarAbsIntRunner]: [0], [26], [31] [2019-03-04 16:39:48,008 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:39:48,008 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:39:48,017 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:39:48,017 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-03-04 16:39:48,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:48,017 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:39:48,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:48,017 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-03-04 16:39:48,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:48,027 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:39:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:48,035 WARN L254 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 15 conjunts are in the unsatisfiable core [2019-03-04 16:39:48,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:39:48,045 INFO L453 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 24 treesize of output 27 [2019-03-04 16:39:48,068 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,069 INFO L453 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 27 treesize of output 29 [2019-03-04 16:39:48,079 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,081 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,082 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,083 INFO L453 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 29 treesize of output 31 [2019-03-04 16:39:48,092 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,094 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,096 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,098 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,100 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,102 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,103 INFO L453 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 31 treesize of output 33 [2019-03-04 16:39:48,113 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,115 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,117 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,119 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,120 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,121 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,121 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,147 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,160 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,162 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,163 INFO L453 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 33 treesize of output 35 [2019-03-04 16:39:48,171 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,173 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,175 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,177 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,178 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,179 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,181 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,182 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,184 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,185 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,187 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,188 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,190 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,191 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,193 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,195 INFO L453 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 35 treesize of output 37 [2019-03-04 16:39:48,201 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,202 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,204 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,205 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,207 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,208 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,210 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,211 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,213 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,214 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,215 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,216 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,218 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,219 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,221 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,222 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,224 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,225 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,227 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,228 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,230 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,232 INFO L453 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2019-03-04 16:39:48,232 INFO L309 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:48,251 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:48,269 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:48,289 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:48,309 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:48,329 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:48,399 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:48,446 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,447 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,448 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,450 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,451 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,456 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,460 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,462 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,470 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,471 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,472 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,472 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2019-03-04 16:39:48,473 INFO L309 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:48,477 INFO L309 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:48,479 INFO L309 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:48,481 INFO L309 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:48,513 INFO L309 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:48,514 INFO L209 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:82, output treesize:54 [2019-03-04 16:39:48,683 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-03-04 16:39:48,734 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,756 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,780 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,805 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,832 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,853 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,878 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,905 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,917 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,921 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,924 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,924 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,925 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,926 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,927 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,928 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,929 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,930 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,931 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,932 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,934 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:48,934 INFO L301 Elim1Store]: Index analysis took 221 ms [2019-03-04 16:39:48,936 INFO L453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-03-04 16:39:48,937 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:48,985 INFO L309 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:48,986 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:56 [2019-03-04 16:39:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:50,156 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:39:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:50,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:39:50,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-03-04 16:39:50,185 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:39:50,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-03-04 16:39:50,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-03-04 16:39:50,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-03-04 16:39:50,185 INFO L87 Difference]: Start difference. First operand 25 states and 82 transitions. Second operand 6 states. [2019-03-04 16:40:09,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:40:09,065 INFO L93 Difference]: Finished difference Result 59 states and 127 transitions. [2019-03-04 16:40:09,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-03-04 16:40:09,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-03-04 16:40:09,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:40:09,068 INFO L225 Difference]: With dead ends: 59 [2019-03-04 16:40:09,068 INFO L226 Difference]: Without dead ends: 57 [2019-03-04 16:40:09,068 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-03-04 16:40:09,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-03-04 16:40:09,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2019-03-04 16:40:09,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-03-04 16:40:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 101 transitions. [2019-03-04 16:40:09,086 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 101 transitions. Word has length 3 [2019-03-04 16:40:09,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:40:09,086 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 101 transitions. [2019-03-04 16:40:09,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-03-04 16:40:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 101 transitions. [2019-03-04 16:40:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:40:09,087 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:40:09,087 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:40:09,087 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:40:09,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:40:09,088 INFO L82 PathProgramCache]: Analyzing trace with hash 955362, now seen corresponding path program 1 times [2019-03-04 16:40:09,090 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:40:09,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:40:09,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:40:09,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:40:09,091 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:40:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:40:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:40:09,171 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-03-04 16:40:09,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-03-04 16:40:09,171 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-03-04 16:40:09,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-03-04 16:40:09,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-03-04 16:40:09,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-03-04 16:40:09,172 INFO L87 Difference]: Start difference. First operand 29 states and 101 transitions. Second operand 3 states. [2019-03-04 16:40:09,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:40:09,258 INFO L93 Difference]: Finished difference Result 33 states and 102 transitions. [2019-03-04 16:40:09,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-03-04 16:40:09,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-03-04 16:40:09,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:40:09,260 INFO L225 Difference]: With dead ends: 33 [2019-03-04 16:40:09,260 INFO L226 Difference]: Without dead ends: 32 [2019-03-04 16:40:09,261 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-03-04 16:40:09,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-03-04 16:40:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-03-04 16:40:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-03-04 16:40:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 100 transitions. [2019-03-04 16:40:09,268 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 100 transitions. Word has length 4 [2019-03-04 16:40:09,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:40:09,268 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 100 transitions. [2019-03-04 16:40:09,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-03-04 16:40:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 100 transitions. [2019-03-04 16:40:09,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:40:09,269 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:40:09,269 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:40:09,270 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:40:09,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:40:09,270 INFO L82 PathProgramCache]: Analyzing trace with hash 941844, now seen corresponding path program 1 times [2019-03-04 16:40:09,270 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:40:09,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:40:09,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:40:09,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:40:09,271 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:40:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:40:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:40:09,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:40:09,342 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:40:09,342 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-03-04 16:40:09,342 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [33] [2019-03-04 16:40:09,344 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:40:09,344 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:40:09,351 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:40:09,351 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-03-04 16:40:09,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:40:09,352 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:40:09,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:40:09,352 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-03-04 16:40:09,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:40:09,362 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:40:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:40:09,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-03-04 16:40:09,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:40:09,378 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,381 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,383 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,385 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,391 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2019-03-04 16:40:09,392 INFO L309 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:09,396 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:09,417 INFO L453 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 24 treesize of output 27 [2019-03-04 16:40:09,443 INFO L453 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2019-03-04 16:40:09,454 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,483 INFO L453 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2019-03-04 16:40:09,491 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,493 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,525 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,569 INFO L453 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 2 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 36 [2019-03-04 16:40:09,575 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,576 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,577 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,578 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,580 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,583 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,593 INFO L453 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 2 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 38 [2019-03-04 16:40:09,603 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,604 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,605 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,606 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,607 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,608 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,611 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,612 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,614 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,616 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,620 INFO L453 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 4 case distinctions, treesize of input 35 treesize of output 37 [2019-03-04 16:40:09,624 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,624 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,625 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,626 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,628 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,629 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,631 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,632 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,634 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,635 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,637 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,639 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,640 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,642 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,643 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,657 INFO L453 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 6 case distinctions, treesize of input 37 treesize of output 39 [2019-03-04 16:40:09,658 INFO L309 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:09,670 INFO L309 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:09,684 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:09,699 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:09,718 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:09,731 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:09,746 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:09,777 INFO L309 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-03-04 16:40:09,777 INFO L209 ElimStorePlain]: Needed 10 recursive calls to eliminate 7 variables, input treesize:60, output treesize:55 [2019-03-04 16:40:09,851 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,875 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,897 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,906 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,908 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,912 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,915 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,917 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,919 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,923 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,925 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,927 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,931 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,933 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,937 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,939 INFO L301 Elim1Store]: Index analysis took 110 ms [2019-03-04 16:40:09,957 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 48 [2019-03-04 16:40:09,959 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-03-04 16:40:10,032 INFO L309 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 11 dim-0 vars, and 2 xjuncts. [2019-03-04 16:40:10,033 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:65, output treesize:110 [2019-03-04 16:40:11,332 WARN L181 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2019-03-04 16:40:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:40:11,337 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:40:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:40:11,491 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-03-04 16:40:11,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2019-03-04 16:40:11,491 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-03-04 16:40:11,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-03-04 16:40:11,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-03-04 16:40:11,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2019-03-04 16:40:11,492 INFO L87 Difference]: Start difference. First operand 29 states and 100 transitions. Second operand 4 states. [2019-03-04 16:40:11,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:40:11,564 INFO L93 Difference]: Finished difference Result 33 states and 111 transitions. [2019-03-04 16:40:11,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-03-04 16:40:11,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-03-04 16:40:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:40:11,566 INFO L225 Difference]: With dead ends: 33 [2019-03-04 16:40:11,566 INFO L226 Difference]: Without dead ends: 32 [2019-03-04 16:40:11,567 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2019-03-04 16:40:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-03-04 16:40:11,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-03-04 16:40:11,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-03-04 16:40:11,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 110 transitions. [2019-03-04 16:40:11,573 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 110 transitions. Word has length 4 [2019-03-04 16:40:11,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:40:11,573 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 110 transitions. [2019-03-04 16:40:11,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-03-04 16:40:11,574 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 110 transitions. [2019-03-04 16:40:11,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:40:11,574 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:40:11,574 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:40:11,575 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:40:11,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:40:11,575 INFO L82 PathProgramCache]: Analyzing trace with hash 941532, now seen corresponding path program 1 times [2019-03-04 16:40:11,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:40:11,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:40:11,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:40:11,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:40:11,576 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:40:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:40:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:40:11,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:40:11,686 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:40:11,686 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-03-04 16:40:11,686 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [31] [2019-03-04 16:40:11,687 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:40:11,687 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:40:11,692 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:40:11,692 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-03-04 16:40:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:40:11,693 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:40:11,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:40:11,693 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-03-04 16:40:11,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:40:11,704 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:40:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:40:11,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 14 conjunts are in the unsatisfiable core [2019-03-04 16:40:11,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:40:11,753 INFO L453 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 24 treesize of output 27 [2019-03-04 16:40:11,788 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,789 INFO L453 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 27 treesize of output 29 [2019-03-04 16:40:11,808 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,811 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,813 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,813 INFO L453 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 29 treesize of output 31 [2019-03-04 16:40:11,821 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,822 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,823 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,824 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,824 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,825 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,826 INFO L453 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 31 treesize of output 33 [2019-03-04 16:40:11,836 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,836 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,837 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,838 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,839 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,841 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,842 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,843 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,845 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,846 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,848 INFO L453 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 33 treesize of output 35 [2019-03-04 16:40:11,853 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,854 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,856 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,857 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,858 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,860 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,861 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,863 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,864 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,865 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,867 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,868 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,870 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,871 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,872 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,874 INFO L453 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 35 treesize of output 37 [2019-03-04 16:40:11,879 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,880 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,882 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,883 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,885 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,886 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,887 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,889 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,890 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,892 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,893 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,894 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,896 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,897 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,899 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,900 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,901 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,903 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,904 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,906 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,907 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:11,909 INFO L453 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2019-03-04 16:40:11,909 INFO L309 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:11,926 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:11,941 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:11,959 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:11,975 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:11,991 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:12,008 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:12,166 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,167 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,168 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,169 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,171 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,174 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,179 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,180 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-03-04 16:40:12,181 INFO L309 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:12,183 INFO L309 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:12,185 INFO L309 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:12,213 INFO L309 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-03-04 16:40:12,213 INFO L209 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-03-04 16:40:12,243 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,244 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,246 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,247 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,248 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,250 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,251 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,252 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,254 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,255 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,257 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,258 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,259 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,261 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,262 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,263 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,265 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,266 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,267 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,269 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,270 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,272 INFO L453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-03-04 16:40:12,273 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:12,304 INFO L309 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-03-04 16:40:12,305 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:56 [2019-03-04 16:40:12,342 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,343 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,344 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,345 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,353 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,354 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,355 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,355 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,356 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,358 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,359 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,360 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,362 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,363 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,364 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,366 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,367 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,368 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,370 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,371 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,372 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:12,374 INFO L453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 43 [2019-03-04 16:40:12,376 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:12,411 INFO L309 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-03-04 16:40:12,412 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-03-04 16:40:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:40:14,685 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:40:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:40:14,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:40:14,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-03-04 16:40:14,731 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:40:14,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-03-04 16:40:14,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-03-04 16:40:14,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-03-04 16:40:14,732 INFO L87 Difference]: Start difference. First operand 31 states and 110 transitions. Second operand 8 states. [2019-03-04 16:40:54,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:40:54,102 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2019-03-04 16:40:54,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-03-04 16:40:54,103 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-03-04 16:40:54,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:40:54,104 INFO L225 Difference]: With dead ends: 74 [2019-03-04 16:40:54,104 INFO L226 Difference]: Without dead ends: 72 [2019-03-04 16:40:54,105 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-03-04 16:40:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-03-04 16:40:54,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 38. [2019-03-04 16:40:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-03-04 16:40:54,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 139 transitions. [2019-03-04 16:40:54,113 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 139 transitions. Word has length 4 [2019-03-04 16:40:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:40:54,114 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 139 transitions. [2019-03-04 16:40:54,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-03-04 16:40:54,114 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 139 transitions. [2019-03-04 16:40:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:40:54,115 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:40:54,115 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:40:54,115 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:40:54,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:40:54,115 INFO L82 PathProgramCache]: Analyzing trace with hash 941160, now seen corresponding path program 1 times [2019-03-04 16:40:54,115 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:40:54,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:40:54,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:40:54,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:40:54,116 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:40:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:40:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:40:54,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:40:54,234 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:40:54,234 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-03-04 16:40:54,234 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [31] [2019-03-04 16:40:54,236 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:40:54,236 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:40:54,240 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:40:54,241 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-03-04 16:40:54,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:40:54,241 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:40:54,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:40:54,241 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-03-04 16:40:54,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:40:54,251 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:40:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:40:54,259 WARN L254 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 16 conjunts are in the unsatisfiable core [2019-03-04 16:40:54,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:40:54,269 INFO L453 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 24 treesize of output 27 [2019-03-04 16:40:54,279 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,279 INFO L453 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 27 treesize of output 29 [2019-03-04 16:40:54,290 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,292 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,294 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,294 INFO L453 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 29 treesize of output 31 [2019-03-04 16:40:54,303 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,306 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,308 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,310 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,311 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,312 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,312 INFO L453 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 31 treesize of output 33 [2019-03-04 16:40:54,320 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,321 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,321 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,322 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,324 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,325 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,327 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,328 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,329 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,331 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,332 INFO L453 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 33 treesize of output 35 [2019-03-04 16:40:54,388 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,410 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,434 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,456 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,467 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,469 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,471 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,472 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,473 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,474 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,476 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,477 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,479 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,480 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,482 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,482 INFO L301 Elim1Store]: Index analysis took 117 ms [2019-03-04 16:40:54,483 INFO L453 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 35 treesize of output 37 [2019-03-04 16:40:54,490 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,491 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,493 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,494 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,496 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,497 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,499 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,500 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,502 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,503 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,505 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,506 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,507 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,509 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,510 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,512 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,513 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,515 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,518 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,519 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,520 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,520 INFO L453 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2019-03-04 16:40:54,521 INFO L309 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:54,537 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:54,556 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:54,573 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:54,588 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:54,606 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:54,624 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:54,669 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,671 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,672 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,673 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,674 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,678 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,681 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,683 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,684 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,689 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,690 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,691 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,692 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2019-03-04 16:40:54,693 INFO L309 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:54,695 INFO L309 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:54,696 INFO L309 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:54,698 INFO L309 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:54,727 INFO L309 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-03-04 16:40:54,727 INFO L209 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:85, output treesize:54 [2019-03-04 16:40:54,765 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,766 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,767 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,768 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,769 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,770 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,772 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,773 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,774 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,775 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,776 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,777 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,778 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,779 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,781 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,782 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,783 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,784 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,785 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,786 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,787 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:54,789 INFO L453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-03-04 16:40:54,789 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:54,820 INFO L309 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-03-04 16:40:54,821 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:56 [2019-03-04 16:40:55,032 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,033 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,035 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,036 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,037 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,038 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,041 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,042 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,042 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,043 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,044 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,045 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,045 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,046 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,048 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,049 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,050 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,051 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,052 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,053 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,054 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:55,056 INFO L453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 43 [2019-03-04 16:40:55,056 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:55,083 INFO L309 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-03-04 16:40:55,083 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:58 [2019-03-04 16:40:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:40:57,375 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:40:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:40:57,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:40:57,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-03-04 16:40:57,454 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:40:57,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-03-04 16:40:57,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-03-04 16:40:57,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-03-04 16:40:57,455 INFO L87 Difference]: Start difference. First operand 38 states and 139 transitions. Second operand 8 states. [2019-03-04 16:41:35,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:41:35,470 INFO L93 Difference]: Finished difference Result 71 states and 181 transitions. [2019-03-04 16:41:35,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-03-04 16:41:35,471 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-03-04 16:41:35,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:41:35,472 INFO L225 Difference]: With dead ends: 71 [2019-03-04 16:41:35,473 INFO L226 Difference]: Without dead ends: 70 [2019-03-04 16:41:35,473 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-03-04 16:41:35,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-03-04 16:41:35,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2019-03-04 16:41:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-03-04 16:41:35,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 139 transitions. [2019-03-04 16:41:35,481 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 139 transitions. Word has length 4 [2019-03-04 16:41:35,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:41:35,481 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 139 transitions. [2019-03-04 16:41:35,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-03-04 16:41:35,482 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 139 transitions. [2019-03-04 16:41:35,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:41:35,482 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:41:35,482 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:41:35,483 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:41:35,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:41:35,483 INFO L82 PathProgramCache]: Analyzing trace with hash 941656, now seen corresponding path program 1 times [2019-03-04 16:41:35,483 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:41:35,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:41:35,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:41:35,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:41:35,484 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:41:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:41:35,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:41:35,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:41:35,577 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:41:35,577 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-03-04 16:41:35,577 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [31] [2019-03-04 16:41:35,578 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:41:35,578 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:41:35,583 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:41:35,584 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-03-04 16:41:35,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:41:35,584 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:41:35,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:41:35,584 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-03-04 16:41:35,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:41:35,593 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:41:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:41:35,613 WARN L254 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 16 conjunts are in the unsatisfiable core [2019-03-04 16:41:35,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:41:35,631 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,632 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,640 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,645 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,647 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,649 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,651 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,653 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,663 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,664 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,664 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,665 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2019-03-04 16:41:35,665 INFO L309 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-03-04 16:41:35,667 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:41:35,669 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:41:35,670 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:41:35,713 INFO L453 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 24 treesize of output 27 [2019-03-04 16:41:35,716 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,717 INFO L453 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 27 treesize of output 29 [2019-03-04 16:41:35,719 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,720 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,721 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,722 INFO L453 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 29 treesize of output 31 [2019-03-04 16:41:35,745 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,746 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,747 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,747 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,748 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,749 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,750 INFO L453 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 31 treesize of output 33 [2019-03-04 16:41:35,755 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,756 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,757 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,758 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,759 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,760 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,762 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,763 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,764 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,765 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,766 INFO L453 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 33 treesize of output 35 [2019-03-04 16:41:35,770 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,771 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,773 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,774 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,775 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,776 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,777 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,778 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,779 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,781 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,782 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,783 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,784 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,785 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,786 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,787 INFO L453 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 35 treesize of output 37 [2019-03-04 16:41:35,792 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,793 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,794 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,795 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,797 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,798 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,799 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,800 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,801 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,802 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,803 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,805 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,806 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,807 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,808 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,809 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,810 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,811 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,813 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,814 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,815 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,816 INFO L453 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2019-03-04 16:41:35,817 INFO L309 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-03-04 16:41:35,864 INFO L309 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:41:35,878 INFO L309 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:41:35,892 INFO L309 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:41:35,906 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:41:35,920 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:41:35,934 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:41:35,961 INFO L309 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-03-04 16:41:35,961 INFO L209 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-03-04 16:41:35,997 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,998 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:35,999 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,000 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,002 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,003 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,004 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,005 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,006 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,007 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,008 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,009 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,010 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,012 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,013 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,014 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,015 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,016 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,017 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,018 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,019 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,021 INFO L453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-03-04 16:41:36,022 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:41:36,052 INFO L309 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-03-04 16:41:36,052 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:56 [2019-03-04 16:41:36,184 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,185 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,186 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,186 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,188 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,189 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,190 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,191 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,192 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,193 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,194 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,195 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,196 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,198 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,199 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,200 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,201 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,202 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,203 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,204 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,205 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:41:36,207 INFO L453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 43 [2019-03-04 16:41:36,207 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:41:36,234 INFO L309 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-03-04 16:41:36,235 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:58 [2019-03-04 16:41:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:41:38,540 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:41:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:41:38,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:41:38,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-03-04 16:41:38,581 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:41:38,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-03-04 16:41:38,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-03-04 16:41:38,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-03-04 16:41:38,582 INFO L87 Difference]: Start difference. First operand 38 states and 139 transitions. Second operand 8 states. [2019-03-04 16:42:14,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:42:14,363 INFO L93 Difference]: Finished difference Result 71 states and 181 transitions. [2019-03-04 16:42:14,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-03-04 16:42:14,363 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-03-04 16:42:14,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:42:14,364 INFO L225 Difference]: With dead ends: 71 [2019-03-04 16:42:14,364 INFO L226 Difference]: Without dead ends: 69 [2019-03-04 16:42:14,365 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-03-04 16:42:14,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-03-04 16:42:14,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 37. [2019-03-04 16:42:14,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-03-04 16:42:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 138 transitions. [2019-03-04 16:42:14,373 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 138 transitions. Word has length 4 [2019-03-04 16:42:14,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:42:14,373 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 138 transitions. [2019-03-04 16:42:14,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-03-04 16:42:14,373 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 138 transitions. [2019-03-04 16:42:14,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:42:14,374 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:42:14,374 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:42:14,374 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:42:14,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:42:14,375 INFO L82 PathProgramCache]: Analyzing trace with hash 941718, now seen corresponding path program 1 times [2019-03-04 16:42:14,375 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:42:14,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:42:14,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:42:14,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:42:14,376 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:42:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:42:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:42:14,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:42:14,512 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:42:14,512 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-03-04 16:42:14,513 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [31] [2019-03-04 16:42:14,514 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:42:14,514 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:42:14,519 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:42:14,519 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-03-04 16:42:14,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:42:14,519 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:42:14,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:42:14,520 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-03-04 16:42:14,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:42:14,529 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:42:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:42:14,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 14 conjunts are in the unsatisfiable core [2019-03-04 16:42:14,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:42:14,543 INFO L453 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 24 treesize of output 27 [2019-03-04 16:42:14,593 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,594 INFO L453 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 27 treesize of output 29 [2019-03-04 16:42:14,601 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,604 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,606 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,606 INFO L453 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 29 treesize of output 31 [2019-03-04 16:42:14,614 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,615 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,617 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,619 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,621 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,623 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,624 INFO L453 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 31 treesize of output 33 [2019-03-04 16:42:14,634 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,636 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,636 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,638 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,640 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,641 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,642 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,644 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,645 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,646 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,647 INFO L453 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 33 treesize of output 35 [2019-03-04 16:42:14,654 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,655 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,656 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,657 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,659 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,660 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,661 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,663 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,664 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,665 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,666 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,668 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,669 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,670 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,671 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,673 INFO L453 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 35 treesize of output 37 [2019-03-04 16:42:14,729 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,743 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,748 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,749 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,749 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,750 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,751 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,752 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,753 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,754 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,756 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,757 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,758 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,759 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,761 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,762 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,763 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,765 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,766 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,767 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,768 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,770 INFO L453 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2019-03-04 16:42:14,770 INFO L309 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-03-04 16:42:14,785 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:42:14,802 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:42:14,818 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:42:14,833 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:42:14,850 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:42:14,887 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:42:14,941 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,942 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,943 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,944 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,946 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,949 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,955 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:14,956 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-03-04 16:42:14,956 INFO L309 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-03-04 16:42:14,958 INFO L309 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:42:14,959 INFO L309 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:42:14,987 INFO L309 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-03-04 16:42:14,988 INFO L209 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-03-04 16:42:15,012 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,013 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,014 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,014 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,015 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,016 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,017 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,019 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,020 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,021 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,022 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,023 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,024 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,025 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,026 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,027 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,029 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,030 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,031 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,042 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,043 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,044 INFO L453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-03-04 16:42:15,044 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:42:15,102 INFO L309 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-03-04 16:42:15,103 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:56 [2019-03-04 16:42:15,311 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,312 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,313 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,314 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,315 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,316 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,318 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,319 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,320 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,321 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,323 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,324 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,325 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,327 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,328 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,329 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,330 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,332 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,333 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,334 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,335 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:15,337 INFO L453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 43 [2019-03-04 16:42:15,337 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:42:15,371 INFO L309 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-03-04 16:42:15,371 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-03-04 16:42:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:42:17,655 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:42:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:42:17,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:42:17,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-03-04 16:42:17,698 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:42:17,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-03-04 16:42:17,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-03-04 16:42:17,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-03-04 16:42:17,698 INFO L87 Difference]: Start difference. First operand 37 states and 138 transitions. Second operand 8 states. [2019-03-04 16:42:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:42:52,549 INFO L93 Difference]: Finished difference Result 74 states and 200 transitions. [2019-03-04 16:42:52,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-03-04 16:42:52,549 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-03-04 16:42:52,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:42:52,550 INFO L225 Difference]: With dead ends: 74 [2019-03-04 16:42:52,550 INFO L226 Difference]: Without dead ends: 63 [2019-03-04 16:42:52,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-03-04 16:42:52,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-03-04 16:42:52,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 35. [2019-03-04 16:42:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-03-04 16:42:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 155 transitions. [2019-03-04 16:42:52,560 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 155 transitions. Word has length 4 [2019-03-04 16:42:52,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:42:52,560 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 155 transitions. [2019-03-04 16:42:52,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-03-04 16:42:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 155 transitions. [2019-03-04 16:42:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:42:52,561 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:42:52,561 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:42:52,561 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:42:52,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:42:52,562 INFO L82 PathProgramCache]: Analyzing trace with hash 941284, now seen corresponding path program 1 times [2019-03-04 16:42:52,562 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:42:52,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:42:52,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:42:52,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:42:52,563 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:42:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:42:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:42:52,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:42:52,659 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:42:52,659 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-03-04 16:42:52,659 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [31] [2019-03-04 16:42:52,660 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:42:52,660 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:42:52,664 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:42:52,664 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-03-04 16:42:52,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:42:52,665 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:42:52,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:42:52,665 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-03-04 16:42:52,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:42:52,676 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:42:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:42:52,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 14 conjunts are in the unsatisfiable core [2019-03-04 16:42:52,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:42:52,689 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,693 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,695 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,698 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,700 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,703 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,708 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,709 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-03-04 16:42:52,709 INFO L309 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-03-04 16:42:52,718 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:42:52,719 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:42:52,738 INFO L453 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 24 treesize of output 27 [2019-03-04 16:42:52,742 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,743 INFO L453 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 27 treesize of output 29 [2019-03-04 16:42:52,750 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,753 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,756 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,757 INFO L453 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 29 treesize of output 31 [2019-03-04 16:42:52,773 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,774 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,775 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,776 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,777 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,778 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,779 INFO L453 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 31 treesize of output 33 [2019-03-04 16:42:52,785 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,787 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,789 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,791 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,792 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,792 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,793 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,794 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,799 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,800 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,800 INFO L453 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 33 treesize of output 35 [2019-03-04 16:42:52,804 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,805 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,806 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,806 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,807 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,808 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,809 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,811 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,812 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,813 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,814 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,815 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,816 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,817 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,819 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,819 INFO L453 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 35 treesize of output 37 [2019-03-04 16:42:52,824 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,825 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,826 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,827 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,828 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,829 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,830 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,832 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,833 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,834 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,835 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,836 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,837 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,838 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,840 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,841 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,842 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,843 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,844 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,845 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,846 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,847 INFO L453 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2019-03-04 16:42:52,848 INFO L309 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-03-04 16:42:52,860 INFO L309 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:42:52,874 INFO L309 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:42:52,888 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:42:52,902 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:42:52,916 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:42:52,934 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:42:52,963 INFO L309 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-03-04 16:42:52,963 INFO L209 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-03-04 16:42:52,990 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,990 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,991 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,992 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,993 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,994 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,995 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,996 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:52,997 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,015 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,018 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,019 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,019 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,020 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,021 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,022 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,023 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,024 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,025 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,026 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,027 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,028 INFO L453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-03-04 16:42:53,029 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:42:53,074 INFO L309 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-03-04 16:42:53,075 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:56 [2019-03-04 16:42:53,115 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,116 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,117 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,118 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,119 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,120 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,122 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,123 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,124 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,125 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,126 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,127 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,128 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,129 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,130 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,132 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,133 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,134 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,135 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,136 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,137 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:42:53,138 INFO L453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 43 [2019-03-04 16:42:53,139 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:42:53,167 INFO L309 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-03-04 16:42:53,167 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-03-04 16:42:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:42:55,457 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:42:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:42:55,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:42:55,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-03-04 16:42:55,497 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:42:55,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-03-04 16:42:55,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-03-04 16:42:55,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-03-04 16:42:55,497 INFO L87 Difference]: Start difference. First operand 35 states and 155 transitions. Second operand 8 states. [2019-03-04 16:43:11,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:43:11,644 INFO L93 Difference]: Finished difference Result 67 states and 213 transitions. [2019-03-04 16:43:11,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-03-04 16:43:11,644 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-03-04 16:43:11,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:43:11,645 INFO L225 Difference]: With dead ends: 67 [2019-03-04 16:43:11,645 INFO L226 Difference]: Without dead ends: 65 [2019-03-04 16:43:11,645 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-03-04 16:43:11,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-03-04 16:43:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2019-03-04 16:43:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-03-04 16:43:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 178 transitions. [2019-03-04 16:43:11,654 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 178 transitions. Word has length 4 [2019-03-04 16:43:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:43:11,654 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 178 transitions. [2019-03-04 16:43:11,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-03-04 16:43:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 178 transitions. [2019-03-04 16:43:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:43:11,655 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:43:11,655 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:43:11,655 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:43:11,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:43:11,656 INFO L82 PathProgramCache]: Analyzing trace with hash 930312, now seen corresponding path program 1 times [2019-03-04 16:43:11,656 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:43:11,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:43:11,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:43:11,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:43:11,657 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:43:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:43:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:43:11,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:43:11,740 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:43:11,740 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-03-04 16:43:11,740 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [33] [2019-03-04 16:43:11,742 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:43:11,742 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:43:11,747 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:43:11,747 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-03-04 16:43:11,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:43:11,748 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:43:11,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:43:11,748 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-03-04 16:43:11,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:43:11,757 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:43:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:43:11,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 12 conjunts are in the unsatisfiable core [2019-03-04 16:43:11,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:43:11,788 INFO L453 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 24 treesize of output 27 [2019-03-04 16:43:11,795 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,796 INFO L453 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 27 treesize of output 29 [2019-03-04 16:43:11,812 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,815 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,832 INFO L453 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 34 [2019-03-04 16:43:11,836 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,838 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,839 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,843 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,854 INFO L453 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 36 [2019-03-04 16:43:11,872 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,873 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,874 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,875 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,876 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,879 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,881 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,892 INFO L453 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 2 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 38 [2019-03-04 16:43:11,899 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,900 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,902 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,903 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,904 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,904 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,905 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,908 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,909 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,911 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,914 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,915 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,928 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2019-03-04 16:43:11,937 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,938 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,939 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,939 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,940 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,942 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,943 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,944 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,945 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,948 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,949 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,950 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,953 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,954 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,956 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,958 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,959 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:11,985 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 39 [2019-03-04 16:43:11,985 INFO L309 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-03-04 16:43:12,000 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:43:12,016 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:43:12,031 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:43:12,048 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:43:12,062 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:43:12,078 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:43:12,120 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,121 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,122 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,123 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,128 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,129 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-03-04 16:43:12,129 INFO L309 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-03-04 16:43:12,154 INFO L309 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:43:12,196 INFO L309 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:43:12,225 INFO L309 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-03-04 16:43:12,225 INFO L209 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:68, output treesize:59 [2019-03-04 16:43:12,247 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,248 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,248 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,249 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,250 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,251 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,252 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,254 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,255 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,257 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,258 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,259 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,261 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,262 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,264 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:43:12,302 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 46 treesize of output 69 [2019-03-04 16:43:12,307 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-03-04 16:43:12,446 INFO L309 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 26 dim-0 vars, and 5 xjuncts. [2019-03-04 16:43:12,446 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:69, output treesize:236 [2019-03-04 16:43:15,078 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-03-04 16:43:15,279 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-03-04 16:43:15,280 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:626) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:152) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:581) 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:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:215) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 45 more [2019-03-04 16:43:15,285 INFO L168 Benchmark]: Toolchain (without parser) took 253827.33 ms. Allocated memory was 133.7 MB in the beginning and 312.5 MB in the end (delta: 178.8 MB). Free memory was 109.0 MB in the beginning and 218.6 MB in the end (delta: -109.6 MB). Peak memory consumption was 69.2 MB. Max. memory is 7.1 GB. [2019-03-04 16:43:15,286 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 133.7 MB. Free memory is still 110.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-03-04 16:43:15,286 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.01 ms. Allocated memory is still 133.7 MB. Free memory was 108.8 MB in the beginning and 106.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-03-04 16:43:15,286 INFO L168 Benchmark]: Boogie Preprocessor took 32.85 ms. Allocated memory is still 133.7 MB. Free memory was 106.5 MB in the beginning and 105.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-03-04 16:43:15,287 INFO L168 Benchmark]: RCFGBuilder took 419.29 ms. Allocated memory is still 133.7 MB. Free memory was 105.2 MB in the beginning and 93.1 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2019-03-04 16:43:15,287 INFO L168 Benchmark]: TraceAbstraction took 253320.28 ms. Allocated memory was 133.7 MB in the beginning and 312.5 MB in the end (delta: 178.8 MB). Free memory was 92.9 MB in the beginning and 218.6 MB in the end (delta: -125.7 MB). Peak memory consumption was 53.1 MB. Max. memory is 7.1 GB. [2019-03-04 16:43:15,289 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 133.7 MB. Free memory is still 110.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 51.01 ms. Allocated memory is still 133.7 MB. Free memory was 108.8 MB in the beginning and 106.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.85 ms. Allocated memory is still 133.7 MB. Free memory was 106.5 MB in the beginning and 105.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 419.29 ms. Allocated memory is still 133.7 MB. Free memory was 105.2 MB in the beginning and 93.1 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 253320.28 ms. Allocated memory was 133.7 MB in the beginning and 312.5 MB in the end (delta: 178.8 MB). Free memory was 92.9 MB in the beginning and 218.6 MB in the end (delta: -125.7 MB). Peak memory consumption was 53.1 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...