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-6-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-1ae3202 [2019-03-04 16:38:50,230 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-03-04 16:38:50,233 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-03-04 16:38:50,248 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-03-04 16:38:50,291 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 16:38:50,308 INFO L110 SettingsManager]: Loading preferences was successful [2019-03-04 16:38:50,308 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-03-04 16:38:50,309 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-03-04 16:38:50,309 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-03-04 16:38:50,309 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-03-04 16:38:50,310 INFO L133 SettingsManager]: * User list type=DISABLED [2019-03-04 16:38:50,310 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-03-04 16:38:50,310 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-03-04 16:38:50,310 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-03-04 16:38:50,310 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-03-04 16:38:50,311 INFO L133 SettingsManager]: * Abstract domain=OctagonDomain [2019-03-04 16:38:50,311 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-03-04 16:38:50,311 INFO L133 SettingsManager]: * Interval Domain=false [2019-03-04 16:38:50,312 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-03-04 16:38:50,312 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-03-04 16:38:50,312 INFO L133 SettingsManager]: * Use SBE=true [2019-03-04 16:38:50,312 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-03-04 16:38:50,312 INFO L133 SettingsManager]: * sizeof long=4 [2019-03-04 16:38:50,313 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-03-04 16:38:50,313 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-03-04 16:38:50,313 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-03-04 16:38:50,313 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-03-04 16:38:50,313 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-03-04 16:38:50,313 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-03-04 16:38:50,314 INFO L133 SettingsManager]: * sizeof long double=12 [2019-03-04 16:38:50,314 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-03-04 16:38:50,314 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-03-04 16:38:50,314 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-03-04 16:38:50,314 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-03-04 16:38:50,315 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-03-04 16:38:50,315 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-03-04 16:38:50,315 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-03-04 16:38:50,315 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-03-04 16:38:50,315 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-03-04 16:38:50,316 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-03-04 16:38:50,316 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-03-04 16:38:50,316 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-03-04 16:38:50,316 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-03-04 16:38:50,316 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-03-04 16:38:50,348 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-03-04 16:38:50,362 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-03-04 16:38:50,370 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-03-04 16:38:50,372 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-03-04 16:38:50,373 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-03-04 16:38:50,374 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-limited.bpl [2019-03-04 16:38:50,374 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-limited.bpl' [2019-03-04 16:38:50,430 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-03-04 16:38:50,432 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-03-04 16:38:50,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-03-04 16:38:50,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-03-04 16:38:50,433 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-03-04 16:38:50,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:38:50" (1/1) ... [2019-03-04 16:38:50,462 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:38:50" (1/1) ... [2019-03-04 16:38:50,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-03-04 16:38:50,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-03-04 16:38:50,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-03-04 16:38:50,493 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-03-04 16:38:50,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:38:50" (1/1) ... [2019-03-04 16:38:50,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:38:50" (1/1) ... [2019-03-04 16:38:50,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:38:50" (1/1) ... [2019-03-04 16:38:50,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:38:50" (1/1) ... [2019-03-04 16:38:50,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:38:50" (1/1) ... [2019-03-04 16:38:50,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:38:50" (1/1) ... [2019-03-04 16:38:50,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:38:50" (1/1) ... [2019-03-04 16:38:50,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-03-04 16:38:50,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-03-04 16:38:50,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-03-04 16:38:50,520 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-03-04 16:38:50,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:38:50" (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 16:38:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-03-04 16:38:50,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-03-04 16:38:51,007 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-03-04 16:38:51,007 INFO L286 CfgBuilder]: Removed 15 assue(true) statements. [2019-03-04 16:38:51,008 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.03 04:38:51 BoogieIcfgContainer [2019-03-04 16:38:51,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-03-04 16:38:51,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-03-04 16:38:51,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-03-04 16:38:51,013 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-03-04 16:38:51,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.03 04:38:50" (1/2) ... [2019-03-04 16:38:51,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57369126 and model type speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 04:38:51, skipping insertion in model container [2019-03-04 16:38:51,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.03 04:38:51" (2/2) ... [2019-03-04 16:38:51,016 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-6-limited.bpl [2019-03-04 16:38:51,026 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-03-04 16:38:51,034 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-03-04 16:38:51,051 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-03-04 16:38:51,083 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-03-04 16:38:51,083 INFO L383 AbstractCegarLoop]: Hoare is true [2019-03-04 16:38:51,083 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-03-04 16:38:51,083 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-03-04 16:38:51,084 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-03-04 16:38:51,084 INFO L387 AbstractCegarLoop]: Difference is false [2019-03-04 16:38:51,084 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-03-04 16:38:51,084 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-03-04 16:38:51,099 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-03-04 16:38:51,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-03-04 16:38:51,105 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:38:51,106 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-03-04 16:38:51,109 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:38:51,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:38:51,115 INFO L82 PathProgramCache]: Analyzing trace with hash 988, now seen corresponding path program 1 times [2019-03-04 16:38:51,118 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:38:51,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:38:51,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:38:51,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:38:51,162 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:38:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:38:51,295 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 16:38:51,297 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-03-04 16:38:51,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-03-04 16:38:51,298 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-03-04 16:38:51,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-03-04 16:38:51,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-03-04 16:38:51,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-03-04 16:38:51,322 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-03-04 16:38:51,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:38:51,596 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2019-03-04 16:38:51,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-03-04 16:38:51,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-03-04 16:38:51,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:38:51,612 INFO L225 Difference]: With dead ends: 29 [2019-03-04 16:38:51,613 INFO L226 Difference]: Without dead ends: 24 [2019-03-04 16:38:51,616 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 16:38:51,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-03-04 16:38:51,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2019-03-04 16:38:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-03-04 16:38:51,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 25 transitions. [2019-03-04 16:38:51,655 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 25 transitions. Word has length 2 [2019-03-04 16:38:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:38:51,656 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 25 transitions. [2019-03-04 16:38:51,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-03-04 16:38:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 25 transitions. [2019-03-04 16:38:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-03-04 16:38:51,657 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:38:51,657 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-03-04 16:38:51,658 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:38:51,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:38:51,659 INFO L82 PathProgramCache]: Analyzing trace with hash 30376, now seen corresponding path program 1 times [2019-03-04 16:38:51,659 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:38:51,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:38:51,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:38:51,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:38:51,661 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:38:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:38:51,816 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2019-03-04 16:38:51,822 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 16:38:51,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:38:51,822 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:38:51,823 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-03-04 16:38:51,825 INFO L207 CegarAbsIntRunner]: [0], [18], [27] [2019-03-04 16:38:51,877 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:38:51,877 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:38:51,944 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:38:51,946 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 16:38:51,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:38:51,951 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:38:51,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:38:51,952 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 16:38:51,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:38:51,965 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:38:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:38:51,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 10 conjunts are in the unsatisfiable core [2019-03-04 16:38:52,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:38:52,050 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,066 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-03-04 16:38:52,068 INFO L309 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-03-04 16:38:52,072 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:52,153 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 21 treesize of output 24 [2019-03-04 16:38:52,206 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,208 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 24 treesize of output 26 [2019-03-04 16:38:52,262 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,287 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,312 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,314 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 26 treesize of output 28 [2019-03-04 16:38:52,369 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,371 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,373 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,375 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,378 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,380 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,382 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 28 treesize of output 30 [2019-03-04 16:38:52,508 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,510 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,512 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,517 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,518 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,530 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,553 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,567 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,569 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,573 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,575 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 30 treesize of output 32 [2019-03-04 16:38:52,593 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,598 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,599 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,600 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,601 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,603 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,605 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,607 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,611 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,615 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,618 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,619 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,621 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,622 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,623 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,630 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-03-04 16:38:52,631 INFO L309 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-03-04 16:38:52,693 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:52,739 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:52,815 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:52,835 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:52,882 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:52,910 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 16:38:52,911 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:45, output treesize:46 [2019-03-04 16:38:52,997 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,998 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:52,999 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:53,000 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:53,002 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:53,004 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:53,005 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:53,006 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:53,007 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:53,009 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:53,011 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:53,013 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:53,015 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:53,018 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:53,019 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:53,022 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-03-04 16:38:53,024 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:38:53,056 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 16:38:53,057 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:48 [2019-03-04 16:38:53,180 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 16:38:53,180 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:38:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:38:53,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:38:53,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-03-04 16:38:53,358 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:38:53,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-03-04 16:38:53,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-03-04 16:38:53,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-03-04 16:38:53,360 INFO L87 Difference]: Start difference. First operand 14 states and 25 transitions. Second operand 6 states. [2019-03-04 16:38:55,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:38:55,047 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2019-03-04 16:38:55,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-03-04 16:38:55,047 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-03-04 16:38:55,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:38:55,050 INFO L225 Difference]: With dead ends: 47 [2019-03-04 16:38:55,050 INFO L226 Difference]: Without dead ends: 45 [2019-03-04 16:38:55,051 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-03-04 16:38:55,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-03-04 16:38:55,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 18. [2019-03-04 16:38:55,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-03-04 16:38:55,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 37 transitions. [2019-03-04 16:38:55,059 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 37 transitions. Word has length 3 [2019-03-04 16:38:55,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:38:55,059 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 37 transitions. [2019-03-04 16:38:55,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-03-04 16:38:55,059 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 37 transitions. [2019-03-04 16:38:55,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-03-04 16:38:55,060 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:38:55,060 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-03-04 16:38:55,060 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:38:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:38:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash 30004, now seen corresponding path program 1 times [2019-03-04 16:38:55,061 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:38:55,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:38:55,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:38:55,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:38:55,062 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:38:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:38:55,121 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 16:38:55,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:38:55,122 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:38:55,122 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-03-04 16:38:55,122 INFO L207 CegarAbsIntRunner]: [0], [6], [27] [2019-03-04 16:38:55,128 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:38:55,128 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:38:55,137 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:38:55,137 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 16:38:55,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:38:55,137 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:38:55,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:38:55,138 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 16:38:55,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:38:55,148 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:38:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:38:55,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 10 conjunts are in the unsatisfiable core [2019-03-04 16:38:55,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:38:55,165 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 21 treesize of output 24 [2019-03-04 16:38:55,178 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,179 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 24 treesize of output 26 [2019-03-04 16:38:55,197 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,200 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,203 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,204 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 26 treesize of output 28 [2019-03-04 16:38:55,223 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,224 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,225 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,226 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,227 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,228 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,230 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 28 treesize of output 30 [2019-03-04 16:38:55,251 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,252 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,254 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,257 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,259 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,262 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,265 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,266 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,268 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,271 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,276 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 30 treesize of output 32 [2019-03-04 16:38:55,288 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,291 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,296 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,299 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,301 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,303 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,305 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,306 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,310 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,313 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,314 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,315 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,316 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,318 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,319 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,322 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-03-04 16:38:55,323 INFO L309 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-03-04 16:38:55,340 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:55,358 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:55,372 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:55,397 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:55,414 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:55,461 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,482 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-03-04 16:38:55,482 INFO L309 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-03-04 16:38:55,484 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:55,513 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 16:38:55,514 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:45, output treesize:46 [2019-03-04 16:38:55,563 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,565 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,567 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,569 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,576 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,577 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,578 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,584 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,601 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,602 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,603 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,607 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,616 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,617 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,618 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:55,620 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-03-04 16:38:55,621 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:38:55,686 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 16:38:55,687 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:46 [2019-03-04 16:38:55,703 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 16:38:55,703 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:38:55,747 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 16:38:55,765 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-03-04 16:38:55,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-03-04 16:38:55,766 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-03-04 16:38:55,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-03-04 16:38:55,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-03-04 16:38:55,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-03-04 16:38:55,767 INFO L87 Difference]: Start difference. First operand 18 states and 37 transitions. Second operand 4 states. [2019-03-04 16:38:55,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:38:55,837 INFO L93 Difference]: Finished difference Result 23 states and 60 transitions. [2019-03-04 16:38:55,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-03-04 16:38:55,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-03-04 16:38:55,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:38:55,838 INFO L225 Difference]: With dead ends: 23 [2019-03-04 16:38:55,838 INFO L226 Difference]: Without dead ends: 22 [2019-03-04 16:38:55,839 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-03-04 16:38:55,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-03-04 16:38:55,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-03-04 16:38:55,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-03-04 16:38:55,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 59 transitions. [2019-03-04 16:38:55,846 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 59 transitions. Word has length 3 [2019-03-04 16:38:55,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:38:55,847 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 59 transitions. [2019-03-04 16:38:55,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-03-04 16:38:55,847 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 59 transitions. [2019-03-04 16:38:55,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-03-04 16:38:55,848 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:38:55,848 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-03-04 16:38:55,848 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:38:55,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:38:55,848 INFO L82 PathProgramCache]: Analyzing trace with hash 30562, now seen corresponding path program 1 times [2019-03-04 16:38:55,848 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:38:55,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:38:55,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:38:55,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:38:55,853 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:38:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:38:55,948 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 16:38:55,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:38:55,948 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:38:55,949 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-03-04 16:38:55,949 INFO L207 CegarAbsIntRunner]: [0], [24], [27] [2019-03-04 16:38:55,952 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:38:55,952 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:38:55,959 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:38:55,959 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 16:38:55,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:38:55,959 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:38:55,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:38:55,959 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 16:38:55,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:38:55,968 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:38:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:38:55,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 10 conjunts are in the unsatisfiable core [2019-03-04 16:38:55,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:38:55,998 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,006 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-03-04 16:38:56,007 INFO L309 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-03-04 16:38:56,009 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:56,055 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 21 treesize of output 24 [2019-03-04 16:38:56,062 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,064 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 24 treesize of output 26 [2019-03-04 16:38:56,105 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,107 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,109 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,110 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 26 treesize of output 28 [2019-03-04 16:38:56,118 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,120 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,122 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,124 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,125 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,126 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,127 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 28 treesize of output 30 [2019-03-04 16:38:56,135 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,136 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,143 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,144 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,152 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,153 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,154 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,155 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,156 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,158 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,160 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 30 treesize of output 32 [2019-03-04 16:38:56,170 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,171 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,173 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,174 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,176 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,177 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,179 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,182 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,184 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,185 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,185 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,195 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,196 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,197 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,197 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,199 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-03-04 16:38:56,199 INFO L309 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-03-04 16:38:56,213 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:56,226 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:56,245 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:56,261 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:56,272 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:56,298 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 16:38:56,298 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:45, output treesize:46 [2019-03-04 16:38:56,333 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,334 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,335 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,339 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,341 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,341 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,342 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,343 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,344 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,344 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,346 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,347 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,348 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,349 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,350 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:56,353 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-03-04 16:38:56,354 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:38:56,384 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 16:38:56,385 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:48 [2019-03-04 16:38:56,469 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 16:38:56,469 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:38:56,482 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 16:38:56,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:38:56,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-03-04 16:38:56,502 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:38:56,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-03-04 16:38:56,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-03-04 16:38:56,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-03-04 16:38:56,503 INFO L87 Difference]: Start difference. First operand 21 states and 59 transitions. Second operand 6 states. [2019-03-04 16:38:57,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:38:57,877 INFO L93 Difference]: Finished difference Result 50 states and 96 transitions. [2019-03-04 16:38:57,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-03-04 16:38:57,878 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-03-04 16:38:57,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:38:57,879 INFO L225 Difference]: With dead ends: 50 [2019-03-04 16:38:57,880 INFO L226 Difference]: Without dead ends: 47 [2019-03-04 16:38:57,880 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-03-04 16:38:57,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-03-04 16:38:57,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2019-03-04 16:38:57,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-03-04 16:38:57,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 74 transitions. [2019-03-04 16:38:57,887 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 74 transitions. Word has length 3 [2019-03-04 16:38:57,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:38:57,887 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 74 transitions. [2019-03-04 16:38:57,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-03-04 16:38:57,887 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 74 transitions. [2019-03-04 16:38:57,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-03-04 16:38:57,888 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:38:57,888 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-03-04 16:38:57,888 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:38:57,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:38:57,888 INFO L82 PathProgramCache]: Analyzing trace with hash 30128, now seen corresponding path program 1 times [2019-03-04 16:38:57,888 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:38:57,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:38:57,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:38:57,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:38:57,889 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:38:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:38:58,005 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 16:38:58,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:38:58,006 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:38:58,006 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-03-04 16:38:58,006 INFO L207 CegarAbsIntRunner]: [0], [10], [27] [2019-03-04 16:38:58,009 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:38:58,009 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:38:58,016 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:38:58,016 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 16:38:58,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:38:58,017 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:38:58,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:38:58,017 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 16:38:58,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:38:58,025 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:38:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:38:58,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 10 conjunts are in the unsatisfiable core [2019-03-04 16:38:58,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:38:58,065 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 21 treesize of output 24 [2019-03-04 16:38:58,075 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,076 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 24 treesize of output 26 [2019-03-04 16:38:58,084 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,087 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,089 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,090 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 26 treesize of output 28 [2019-03-04 16:38:58,096 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,098 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,099 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,101 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,102 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,103 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,105 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 28 treesize of output 30 [2019-03-04 16:38:58,145 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,150 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,152 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,154 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,156 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,156 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,157 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,158 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,159 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,160 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,162 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 30 treesize of output 32 [2019-03-04 16:38:58,168 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,169 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,169 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,170 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,172 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,173 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,174 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,175 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,177 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,179 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,180 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,181 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,183 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,184 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,185 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,188 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-03-04 16:38:58,189 INFO L309 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-03-04 16:38:58,226 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:58,242 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:58,260 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:58,276 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:58,292 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:58,329 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,335 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-03-04 16:38:58,335 INFO L309 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-03-04 16:38:58,338 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:38:58,371 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 16:38:58,372 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:45, output treesize:46 [2019-03-04 16:38:58,413 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,415 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,417 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,419 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,421 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,423 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,425 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,427 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,429 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,431 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,433 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,439 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,441 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,443 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,445 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:58,446 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-03-04 16:38:58,448 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:38:58,482 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 16:38:58,482 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:48 [2019-03-04 16:38:58,571 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 16:38:58,572 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:38:58,598 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 16:38:58,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:38:58,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-03-04 16:38:58,617 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:38:58,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-03-04 16:38:58,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-03-04 16:38:58,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-03-04 16:38:58,617 INFO L87 Difference]: Start difference. First operand 24 states and 74 transitions. Second operand 6 states. [2019-03-04 16:38:59,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:38:59,697 INFO L93 Difference]: Finished difference Result 50 states and 108 transitions. [2019-03-04 16:38:59,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-03-04 16:38:59,697 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-03-04 16:38:59,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:38:59,699 INFO L225 Difference]: With dead ends: 50 [2019-03-04 16:38:59,699 INFO L226 Difference]: Without dead ends: 48 [2019-03-04 16:38:59,700 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-03-04 16:38:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-03-04 16:38:59,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 26. [2019-03-04 16:38:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-03-04 16:38:59,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 87 transitions. [2019-03-04 16:38:59,707 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 87 transitions. Word has length 3 [2019-03-04 16:38:59,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:38:59,708 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 87 transitions. [2019-03-04 16:38:59,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-03-04 16:38:59,708 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 87 transitions. [2019-03-04 16:38:59,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:38:59,708 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:38:59,708 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:38:59,709 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:38:59,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:38:59,709 INFO L82 PathProgramCache]: Analyzing trace with hash 941528, now seen corresponding path program 1 times [2019-03-04 16:38:59,709 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:38:59,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:38:59,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:38:59,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:38:59,710 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:38:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:38:59,832 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 16:38:59,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:38:59,832 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:38:59,833 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-03-04 16:38:59,833 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [27] [2019-03-04 16:38:59,837 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:38:59,837 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:38:59,844 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:38:59,844 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 16:38:59,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:38:59,844 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:38:59,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:38:59,845 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 16:38:59,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:38:59,853 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:38:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:38:59,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2019-03-04 16:38:59,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:38:59,871 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 21 treesize of output 24 [2019-03-04 16:38:59,876 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,877 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 24 treesize of output 26 [2019-03-04 16:38:59,883 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,885 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,887 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,888 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 26 treesize of output 28 [2019-03-04 16:38:59,893 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,895 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,897 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,899 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,900 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,902 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,903 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 28 treesize of output 30 [2019-03-04 16:38:59,922 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,923 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,923 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,924 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,925 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,926 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,927 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,928 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,930 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,931 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:38:59,932 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 30 treesize of output 32 [2019-03-04 16:38:59,990 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,011 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,036 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,058 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,081 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,103 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,128 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,153 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,174 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,199 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,212 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,217 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,218 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,218 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,219 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,219 INFO L301 Elim1Store]: Index analysis took 250 ms [2019-03-04 16:39:00,220 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-03-04 16:39:00,221 INFO L309 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:00,235 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:00,287 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:00,298 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:00,312 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:00,323 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:00,353 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,357 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-03-04 16:39:00,357 INFO L309 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:00,359 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:00,382 INFO L309 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:00,382 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:45, output treesize:46 [2019-03-04 16:39:00,453 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,454 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,455 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,456 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,457 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,458 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,459 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,460 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,461 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,462 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,464 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,465 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,466 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,467 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,468 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,470 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-03-04 16:39:00,470 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:00,494 INFO L309 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:00,495 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:48 [2019-03-04 16:39:00,557 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,558 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,559 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,559 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,560 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,561 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,562 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,563 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,565 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,566 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,567 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,568 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,569 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,570 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,572 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:00,574 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2019-03-04 16:39:00,574 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:00,600 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 16:39:00,600 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:48 [2019-03-04 16:39:00,747 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 16:39:00,747 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:39:00,774 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 16:39:00,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:39:00,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-03-04 16:39:00,794 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:39:00,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-03-04 16:39:00,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-03-04 16:39:00,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-03-04 16:39:00,796 INFO L87 Difference]: Start difference. First operand 26 states and 87 transitions. Second operand 8 states. [2019-03-04 16:39:03,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:39:03,838 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2019-03-04 16:39:03,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-03-04 16:39:03,838 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-03-04 16:39:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:39:03,840 INFO L225 Difference]: With dead ends: 62 [2019-03-04 16:39:03,840 INFO L226 Difference]: Without dead ends: 58 [2019-03-04 16:39:03,841 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-03-04 16:39:03,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-03-04 16:39:03,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 30. [2019-03-04 16:39:03,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-03-04 16:39:03,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 105 transitions. [2019-03-04 16:39:03,853 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 105 transitions. Word has length 4 [2019-03-04 16:39:03,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:39:03,853 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 105 transitions. [2019-03-04 16:39:03,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-03-04 16:39:03,853 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 105 transitions. [2019-03-04 16:39:03,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:39:03,854 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:39:03,854 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:39:03,854 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:39:03,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:03,854 INFO L82 PathProgramCache]: Analyzing trace with hash 941590, now seen corresponding path program 1 times [2019-03-04 16:39:03,855 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:39:03,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:03,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:03,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:03,856 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:39:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:03,963 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 16:39:03,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:03,963 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:39:03,963 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-03-04 16:39:03,963 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [27] [2019-03-04 16:39:03,965 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:39:03,965 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:39:03,970 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:39:03,970 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 16:39:03,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:03,970 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:39:03,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:03,971 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 16:39:03,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:03,984 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:39:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:04,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2019-03-04 16:39:04,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:39:04,023 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,026 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-03-04 16:39:04,026 INFO L309 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,028 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,057 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 21 treesize of output 24 [2019-03-04 16:39:04,070 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,071 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 24 treesize of output 26 [2019-03-04 16:39:04,076 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,077 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,077 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,078 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 26 treesize of output 28 [2019-03-04 16:39:04,120 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,123 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,126 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,129 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,132 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,135 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,136 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 28 treesize of output 30 [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 16:39:04,142 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 16:39:04,144 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 16:39:04,147 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,148 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 16:39:04,151 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 30 treesize of output 32 [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 16:39:04,158 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 16:39:04,169 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,170 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,170 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,171 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,172 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,173 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,174 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,175 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,176 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,177 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,178 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-03-04 16:39:04,179 INFO L309 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,190 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,219 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,255 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,271 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,284 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,307 INFO L309 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:04,307 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:45, output treesize:46 [2019-03-04 16:39:04,363 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,364 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,365 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,366 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,367 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,368 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,369 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,373 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,374 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,375 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,376 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,376 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,377 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,378 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,379 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,381 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-03-04 16:39:04,382 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,406 INFO L309 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:04,406 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:48 [2019-03-04 16:39:04,435 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,436 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,437 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,438 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,439 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,440 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,442 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,443 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,444 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,445 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,446 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,447 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,448 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,449 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,451 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:04,452 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2019-03-04 16:39:04,453 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:04,479 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 16:39:04,480 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:50 [2019-03-04 16:39:04,632 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 16:39:04,632 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:39:04,656 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 16:39:04,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:39:04,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-03-04 16:39:04,675 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:39:04,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-03-04 16:39:04,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-03-04 16:39:04,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-03-04 16:39:04,676 INFO L87 Difference]: Start difference. First operand 30 states and 105 transitions. Second operand 8 states. [2019-03-04 16:39:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:39:07,310 INFO L93 Difference]: Finished difference Result 60 states and 147 transitions. [2019-03-04 16:39:07,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-03-04 16:39:07,311 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-03-04 16:39:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:39:07,312 INFO L225 Difference]: With dead ends: 60 [2019-03-04 16:39:07,312 INFO L226 Difference]: Without dead ends: 56 [2019-03-04 16:39:07,312 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-03-04 16:39:07,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-03-04 16:39:07,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2019-03-04 16:39:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-03-04 16:39:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 110 transitions. [2019-03-04 16:39:07,320 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 110 transitions. Word has length 4 [2019-03-04 16:39:07,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:39:07,321 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 110 transitions. [2019-03-04 16:39:07,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-03-04 16:39:07,321 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 110 transitions. [2019-03-04 16:39:07,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:39:07,322 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:39:07,322 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:39:07,322 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:39:07,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:07,322 INFO L82 PathProgramCache]: Analyzing trace with hash 941156, now seen corresponding path program 1 times [2019-03-04 16:39:07,322 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:39:07,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:07,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:07,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:07,323 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:39:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:07,415 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 16:39:07,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:07,415 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:39:07,415 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-03-04 16:39:07,416 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [27] [2019-03-04 16:39:07,416 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:39:07,417 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:39:07,421 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:39:07,421 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 16:39:07,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:07,422 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:39:07,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:07,422 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-03-04 16:39:07,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:07,436 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:39:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:07,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2019-03-04 16:39:07,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:39:07,452 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 21 treesize of output 24 [2019-03-04 16:39:07,460 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,461 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 24 treesize of output 26 [2019-03-04 16:39:07,470 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,473 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,476 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,477 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 26 treesize of output 28 [2019-03-04 16:39:07,482 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,484 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,487 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,487 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,488 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,490 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,491 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 28 treesize of output 30 [2019-03-04 16:39:07,494 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,495 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,496 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,498 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,499 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,500 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,501 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,503 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,504 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,505 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,507 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 30 treesize of output 32 [2019-03-04 16:39:07,526 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,528 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,530 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,532 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,534 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,536 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,538 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,540 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,542 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,545 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,547 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,549 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,549 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,550 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,551 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,552 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-03-04 16:39:07,552 INFO L309 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:07,566 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:07,578 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:07,591 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:07,604 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:07,617 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:07,650 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,655 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-03-04 16:39:07,655 INFO L309 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:07,658 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:07,683 INFO L309 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:07,684 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:45, output treesize:46 [2019-03-04 16:39:07,716 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,718 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,719 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,720 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,722 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,723 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,724 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,726 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,727 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,728 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,730 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,731 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,732 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,734 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,735 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,738 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-03-04 16:39:07,740 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:07,822 INFO L309 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:07,823 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:48 [2019-03-04 16:39:07,887 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,888 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,889 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,889 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,890 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,891 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,893 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,894 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,895 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,897 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,898 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,899 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,901 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,902 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,903 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:07,905 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2019-03-04 16:39:07,906 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:07,932 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 16:39:07,932 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:50 [2019-03-04 16:39:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:08,079 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:39:08,112 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 16:39:08,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:39:08,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-03-04 16:39:08,131 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:39:08,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-03-04 16:39:08,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-03-04 16:39:08,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-03-04 16:39:08,132 INFO L87 Difference]: Start difference. First operand 30 states and 110 transitions. Second operand 8 states. [2019-03-04 16:39:09,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:39:09,971 INFO L93 Difference]: Finished difference Result 57 states and 144 transitions. [2019-03-04 16:39:09,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-03-04 16:39:09,972 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-03-04 16:39:09,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:39:09,973 INFO L225 Difference]: With dead ends: 57 [2019-03-04 16:39:09,974 INFO L226 Difference]: Without dead ends: 55 [2019-03-04 16:39:09,974 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-03-04 16:39:09,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-03-04 16:39:09,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2019-03-04 16:39:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-03-04 16:39:09,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 109 transitions. [2019-03-04 16:39:09,982 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 109 transitions. Word has length 4 [2019-03-04 16:39:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:39:09,983 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 109 transitions. [2019-03-04 16:39:09,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-03-04 16:39:09,983 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 109 transitions. [2019-03-04 16:39:09,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:39:09,983 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:39:09,984 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:39:09,984 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:39:09,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:09,984 INFO L82 PathProgramCache]: Analyzing trace with hash 941280, now seen corresponding path program 1 times [2019-03-04 16:39:09,984 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:39:09,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:09,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:09,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:09,986 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:39:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:10,090 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 16:39:10,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:10,091 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:39:10,091 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-03-04 16:39:10,091 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [27] [2019-03-04 16:39:10,092 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:39:10,092 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:39:10,097 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:39:10,097 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 16:39:10,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:10,097 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:39:10,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:10,098 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 16:39:10,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:10,111 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:39:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:10,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2019-03-04 16:39:10,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:39:10,159 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,164 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-03-04 16:39:10,165 INFO L309 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:10,170 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:10,190 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 21 treesize of output 24 [2019-03-04 16:39:10,199 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,199 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 24 treesize of output 26 [2019-03-04 16:39:10,202 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,203 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,204 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,205 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 26 treesize of output 28 [2019-03-04 16:39:10,220 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,221 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,222 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,223 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,224 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,225 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,226 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 28 treesize of output 30 [2019-03-04 16:39:10,237 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,238 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,238 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,239 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,240 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,241 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,242 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,243 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,244 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,246 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,247 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 30 treesize of output 32 [2019-03-04 16:39:10,251 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,251 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,253 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,254 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,255 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,256 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,257 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,259 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,260 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,261 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,262 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,263 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,264 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,266 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,267 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,268 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-03-04 16:39:10,269 INFO L309 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:10,280 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:10,293 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:10,305 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:10,318 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:10,330 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:10,353 INFO L309 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:10,354 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:45, output treesize:46 [2019-03-04 16:39:10,379 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,380 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,380 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,381 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,382 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,383 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,384 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,385 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,386 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,388 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,389 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,390 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,391 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,392 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,399 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,400 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-03-04 16:39:10,401 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:10,424 INFO L309 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:10,425 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:48 [2019-03-04 16:39:10,458 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,459 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,460 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,461 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,462 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,463 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,464 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,465 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,467 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,468 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,469 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,470 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,471 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,472 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,473 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:10,475 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2019-03-04 16:39:10,476 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:10,498 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 16:39:10,499 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:48 [2019-03-04 16:39:10,644 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 16:39:10,644 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:39:10,667 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 16:39:10,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:39:10,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-03-04 16:39:10,685 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:39:10,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-03-04 16:39:10,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-03-04 16:39:10,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-03-04 16:39:10,687 INFO L87 Difference]: Start difference. First operand 30 states and 109 transitions. Second operand 8 states. [2019-03-04 16:39:12,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:39:12,534 INFO L93 Difference]: Finished difference Result 57 states and 158 transitions. [2019-03-04 16:39:12,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-03-04 16:39:12,535 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-03-04 16:39:12,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:39:12,536 INFO L225 Difference]: With dead ends: 57 [2019-03-04 16:39:12,536 INFO L226 Difference]: Without dead ends: 53 [2019-03-04 16:39:12,537 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-03-04 16:39:12,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-03-04 16:39:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2019-03-04 16:39:12,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-03-04 16:39:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 126 transitions. [2019-03-04 16:39:12,546 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 126 transitions. Word has length 4 [2019-03-04 16:39:12,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:39:12,546 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 126 transitions. [2019-03-04 16:39:12,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-03-04 16:39:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 126 transitions. [2019-03-04 16:39:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:39:12,547 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:39:12,547 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:39:12,548 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:39:12,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:12,548 INFO L82 PathProgramCache]: Analyzing trace with hash 929872, now seen corresponding path program 1 times [2019-03-04 16:39:12,548 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:39:12,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:12,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:12,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:12,549 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:39:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:12,699 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 16:39:12,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:12,699 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:39:12,700 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-03-04 16:39:12,700 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [27] [2019-03-04 16:39:12,701 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:39:12,701 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:39:12,705 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:39:12,705 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 16:39:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:12,706 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:39:12,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:12,706 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:39:12,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:12,723 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:39:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:12,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2019-03-04 16:39:12,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:39:12,739 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,743 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-03-04 16:39:12,744 INFO L309 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:12,745 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:12,764 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 21 treesize of output 24 [2019-03-04 16:39:12,769 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,770 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 24 treesize of output 26 [2019-03-04 16:39:12,774 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,775 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,776 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,777 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 26 treesize of output 28 [2019-03-04 16:39:12,792 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,794 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,796 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,798 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,800 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,802 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,803 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 28 treesize of output 30 [2019-03-04 16:39:12,810 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,810 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,811 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,812 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,813 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,813 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,814 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,816 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,817 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,818 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,819 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 30 treesize of output 32 [2019-03-04 16:39:12,832 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,833 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,834 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,835 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,836 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,837 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,838 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,840 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,841 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,842 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,843 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,844 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,846 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,847 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,848 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,849 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-03-04 16:39:12,850 INFO L309 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:12,862 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:12,873 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:12,884 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:12,895 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:12,908 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:12,932 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 16:39:12,932 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:45, output treesize:46 [2019-03-04 16:39:12,968 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,969 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,971 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,971 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,972 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,973 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,974 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,975 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,977 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,978 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,979 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,980 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,980 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,981 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,982 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:12,984 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-03-04 16:39:12,984 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:13,009 INFO L309 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:13,010 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:46 [2019-03-04 16:39:13,032 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:13,033 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:13,034 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:13,035 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:13,036 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:13,037 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:13,038 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:13,039 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:13,040 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:13,041 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:13,043 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:13,044 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:13,045 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:13,046 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:13,047 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:13,048 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-03-04 16:39:13,049 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:13,115 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 16:39:13,116 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:48 [2019-03-04 16:39:13,197 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 16:39:13,197 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:39:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:13,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:39:13,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-03-04 16:39:13,239 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:39:13,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-03-04 16:39:13,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-03-04 16:39:13,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-03-04 16:39:13,240 INFO L87 Difference]: Start difference. First operand 31 states and 126 transitions. Second operand 8 states. [2019-03-04 16:39:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:39:14,759 INFO L93 Difference]: Finished difference Result 77 states and 200 transitions. [2019-03-04 16:39:14,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-03-04 16:39:14,760 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-03-04 16:39:14,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:39:14,761 INFO L225 Difference]: With dead ends: 77 [2019-03-04 16:39:14,761 INFO L226 Difference]: Without dead ends: 75 [2019-03-04 16:39:14,762 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-03-04 16:39:14,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-03-04 16:39:14,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 38. [2019-03-04 16:39:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-03-04 16:39:14,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 159 transitions. [2019-03-04 16:39:14,772 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 159 transitions. Word has length 4 [2019-03-04 16:39:14,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:39:14,772 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 159 transitions. [2019-03-04 16:39:14,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-03-04 16:39:14,772 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 159 transitions. [2019-03-04 16:39:14,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:39:14,773 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:39:14,773 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:39:14,773 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:39:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:14,773 INFO L82 PathProgramCache]: Analyzing trace with hash 930058, now seen corresponding path program 1 times [2019-03-04 16:39:14,773 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:39:14,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:14,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:14,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:14,775 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:39:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:14,859 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 16:39:14,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:14,859 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:39:14,859 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-03-04 16:39:14,860 INFO L207 CegarAbsIntRunner]: [0], [6], [24], [27] [2019-03-04 16:39:14,861 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:39:14,861 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:39:14,864 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:39:14,864 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 16:39:14,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:14,864 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:39:14,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:14,864 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 16:39:14,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:14,876 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:39:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:14,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2019-03-04 16:39:14,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:39:14,900 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 21 treesize of output 24 [2019-03-04 16:39:14,904 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,905 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 24 treesize of output 26 [2019-03-04 16:39:14,917 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,920 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,923 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,923 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 26 treesize of output 28 [2019-03-04 16:39:14,938 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,941 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,944 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,945 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,946 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,947 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,947 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 28 treesize of output 30 [2019-03-04 16:39:14,954 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,955 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,956 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,957 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,957 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,958 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,960 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,961 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,962 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,963 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,964 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 30 treesize of output 32 [2019-03-04 16:39:14,970 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,971 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,972 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:14,973 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,000 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,010 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,016 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,017 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,018 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,018 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,019 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,020 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,021 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,022 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,024 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,025 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-03-04 16:39:15,025 INFO L309 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:15,072 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:15,083 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:15,096 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:15,109 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:15,122 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:15,150 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,154 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-03-04 16:39:15,155 INFO L309 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:15,156 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:15,184 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 16:39:15,184 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:45, output treesize:46 [2019-03-04 16:39:15,233 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,234 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,235 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,236 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,237 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,238 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,239 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,240 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,241 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,243 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,244 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,245 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,246 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,247 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,248 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,250 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-03-04 16:39:15,250 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:15,273 INFO L309 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-03-04 16:39:15,274 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:46 [2019-03-04 16:39:15,295 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,296 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,296 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,297 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,298 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,299 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,300 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,301 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,302 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,303 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,305 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,306 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,307 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,308 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,309 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:15,310 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-03-04 16:39:15,311 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:15,335 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 16:39:15,336 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:48 [2019-03-04 16:39:15,417 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 16:39:15,417 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:39:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:39:15,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:39:15,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-03-04 16:39:15,450 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:39:15,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-03-04 16:39:15,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-03-04 16:39:15,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-03-04 16:39:15,451 INFO L87 Difference]: Start difference. First operand 38 states and 159 transitions. Second operand 8 states. [2019-03-04 16:39:17,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:39:17,078 INFO L93 Difference]: Finished difference Result 82 states and 241 transitions. [2019-03-04 16:39:17,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-03-04 16:39:17,079 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-03-04 16:39:17,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:39:17,080 INFO L225 Difference]: With dead ends: 82 [2019-03-04 16:39:17,080 INFO L226 Difference]: Without dead ends: 79 [2019-03-04 16:39:17,081 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-03-04 16:39:17,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-03-04 16:39:17,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 46. [2019-03-04 16:39:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-03-04 16:39:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 209 transitions. [2019-03-04 16:39:17,090 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 209 transitions. Word has length 4 [2019-03-04 16:39:17,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:39:17,091 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 209 transitions. [2019-03-04 16:39:17,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-03-04 16:39:17,091 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 209 transitions. [2019-03-04 16:39:17,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:39:17,092 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:39:17,092 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:39:17,092 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:39:17,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:17,092 INFO L82 PathProgramCache]: Analyzing trace with hash 930184, now seen corresponding path program 1 times [2019-03-04 16:39:17,092 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:39:17,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:17,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:17,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:39:17,094 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:39:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:17,158 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 16:39:17,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:17,159 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:39:17,159 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-03-04 16:39:17,159 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [29] [2019-03-04 16:39:17,161 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:39:17,161 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:39:17,167 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:39:17,167 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 16:39:17,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:39:17,168 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:39:17,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:39:17,168 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:39:17,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:39:17,177 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:39:17,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:39:17,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 9 conjunts are in the unsatisfiable core [2019-03-04 16:39:17,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:39:17,193 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 16:39:17,193 INFO L309 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:17,197 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:17,214 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 21 treesize of output 24 [2019-03-04 16:39:17,219 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 24 treesize of output 26 [2019-03-04 16:39:17,222 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,233 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 26 treesize of output 31 [2019-03-04 16:39:17,245 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,248 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,252 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,266 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 28 treesize of output 33 [2019-03-04 16:39:17,284 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,285 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,287 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,288 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,290 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,293 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,303 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 30 treesize of output 35 [2019-03-04 16:39:17,309 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,310 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,312 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,313 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,314 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,316 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,318 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,320 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,322 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,324 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:17,336 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 5 case distinctions, treesize of input 32 treesize of output 34 [2019-03-04 16:39:17,337 INFO L309 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-03-04 16:39:17,354 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:17,367 INFO L309 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:17,384 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:17,396 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:17,407 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:39:17,431 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 16:39:17,431 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:42, output treesize:47 [2019-03-04 16:39:19,460 WARN L181 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 29 [2019-03-04 16:39:19,466 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:19,467 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:19,468 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:19,469 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:19,469 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:19,471 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:19,472 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:19,474 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:19,475 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:19,477 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:39:19,549 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 41 treesize of output 64 [2019-03-04 16:39:19,554 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-03-04 16:39:19,715 INFO L309 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 21 dim-0 vars, and 5 xjuncts. [2019-03-04 16:39:19,715 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:57, output treesize:196 [2019-03-04 16:39:31,091 WARN L181 SmtUtils]: Spent 11.31 s on a formula simplification that was a NOOP. DAG size: 106 [2019-03-04 16:39:31,100 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 16:39:31,100 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:39:31,233 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 16:39:31,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:39:31,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-03-04 16:39:31,253 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:39:31,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-03-04 16:39:31,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-03-04 16:39:31,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-03-04 16:39:31,253 INFO L87 Difference]: Start difference. First operand 46 states and 209 transitions. Second operand 6 states. [2019-03-04 16:40:04,262 WARN L181 SmtUtils]: Spent 32.96 s on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2019-03-04 16:40:06,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:40:06,613 INFO L93 Difference]: Finished difference Result 59 states and 225 transitions. [2019-03-04 16:40:06,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-03-04 16:40:06,613 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-03-04 16:40:06,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:40:06,614 INFO L225 Difference]: With dead ends: 59 [2019-03-04 16:40:06,614 INFO L226 Difference]: Without dead ends: 58 [2019-03-04 16:40:06,615 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-03-04 16:40:06,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-03-04 16:40:06,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2019-03-04 16:40:06,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-03-04 16:40:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 216 transitions. [2019-03-04 16:40:06,625 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 216 transitions. Word has length 4 [2019-03-04 16:40:06,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:40:06,625 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 216 transitions. [2019-03-04 16:40:06,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-03-04 16:40:06,625 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 216 transitions. [2019-03-04 16:40:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:40:06,626 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:40:06,626 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:40:06,626 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:40:06,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:40:06,627 INFO L82 PathProgramCache]: Analyzing trace with hash 945000, now seen corresponding path program 1 times [2019-03-04 16:40:06,627 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:40:06,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:40:06,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:40:06,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:40:06,628 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:40:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:40:06,866 WARN L181 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 17 [2019-03-04 16:40:06,889 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 16:40:06,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:40:06,889 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:40:06,889 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-03-04 16:40:06,889 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [27] [2019-03-04 16:40:06,890 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:40:06,890 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:40:06,894 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:40:06,894 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 16:40:06,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:40:06,895 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:40:06,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:40:06,895 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-03-04 16:40:06,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:40:06,906 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:40:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:40:06,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2019-03-04 16:40:06,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:40:06,917 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 21 treesize of output 24 [2019-03-04 16:40:06,921 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,922 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 24 treesize of output 26 [2019-03-04 16:40:06,931 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,939 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,951 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,952 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 26 treesize of output 28 [2019-03-04 16:40:06,955 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,956 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,957 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,959 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,960 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,961 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,962 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 28 treesize of output 30 [2019-03-04 16:40:06,985 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,986 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,987 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,987 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,988 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,990 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,991 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,992 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,993 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,995 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:06,996 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 30 treesize of output 32 [2019-03-04 16:40:07,002 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,003 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,004 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,005 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,006 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,007 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,008 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,010 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,011 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,012 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,013 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,014 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,016 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,017 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,018 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,019 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-03-04 16:40:07,020 INFO L309 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:07,033 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:07,046 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:07,059 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:07,073 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:07,086 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:07,117 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,121 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-03-04 16:40:07,122 INFO L309 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:07,124 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:07,148 INFO L309 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-03-04 16:40:07,149 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:45, output treesize:46 [2019-03-04 16:40:07,173 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,173 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,174 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,175 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,176 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,177 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,179 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,180 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,181 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,182 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,183 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,185 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,186 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,187 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,188 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,190 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-03-04 16:40:07,190 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:07,215 INFO L309 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-03-04 16:40:07,215 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:46 [2019-03-04 16:40:07,249 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,250 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,251 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,252 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,253 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,254 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,256 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,257 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,258 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,259 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,260 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,261 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,263 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,264 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,265 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:07,266 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-03-04 16:40:07,267 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:07,290 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 16:40:07,290 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:48 [2019-03-04 16:40:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-03-04 16:40:07,451 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:40:07,481 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 16:40:07,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:40:07,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-03-04 16:40:07,501 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:40:07,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-03-04 16:40:07,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-03-04 16:40:07,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-03-04 16:40:07,502 INFO L87 Difference]: Start difference. First operand 48 states and 216 transitions. Second operand 8 states. [2019-03-04 16:40:09,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-03-04 16:40:09,694 INFO L93 Difference]: Finished difference Result 84 states and 281 transitions. [2019-03-04 16:40:09,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-03-04 16:40:09,696 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-03-04 16:40:09,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-03-04 16:40:09,697 INFO L225 Difference]: With dead ends: 84 [2019-03-04 16:40:09,697 INFO L226 Difference]: Without dead ends: 82 [2019-03-04 16:40:09,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-03-04 16:40:09,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-03-04 16:40:09,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2019-03-04 16:40:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-03-04 16:40:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 244 transitions. [2019-03-04 16:40:09,708 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 244 transitions. Word has length 4 [2019-03-04 16:40:09,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-03-04 16:40:09,708 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 244 transitions. [2019-03-04 16:40:09,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-03-04 16:40:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 244 transitions. [2019-03-04 16:40:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-03-04 16:40:09,709 INFO L394 BasicCegarLoop]: Found error trace [2019-03-04 16:40:09,709 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-03-04 16:40:09,710 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-03-04 16:40:09,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:40:09,710 INFO L82 PathProgramCache]: Analyzing trace with hash 946922, now seen corresponding path program 1 times [2019-03-04 16:40:09,710 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-03-04 16:40:09,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:40:09,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:40:09,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-03-04 16:40:09,711 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-03-04 16:40:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:40:09,803 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 16:40:09,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:40:09,804 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-03-04 16:40:09,804 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-03-04 16:40:09,804 INFO L207 CegarAbsIntRunner]: [0], [10], [24], [27] [2019-03-04 16:40:09,806 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2019-03-04 16:40:09,806 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-03-04 16:40:09,810 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-03-04 16:40:09,810 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 16:40:09,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-03-04 16:40:09,810 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-03-04 16:40:09,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-03-04 16:40:09,810 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-03-04 16:40:09,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-03-04 16:40:09,827 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-03-04 16:40:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-03-04 16:40:09,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2019-03-04 16:40:09,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-03-04 16:40:09,858 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 21 treesize of output 24 [2019-03-04 16:40:09,867 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,867 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 24 treesize of output 26 [2019-03-04 16:40:09,881 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,882 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,883 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,883 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 26 treesize of output 28 [2019-03-04 16:40:09,895 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 16:40:09,899 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,902 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,904 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,907 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,907 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 28 treesize of output 30 [2019-03-04 16:40:09,913 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 16:40:09,921 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 16:40:09,933 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,945 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,947 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,949 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,950 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 30 treesize of output 32 [2019-03-04 16:40:09,960 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,963 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,965 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,967 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,970 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,973 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,976 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,978 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,981 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,983 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,985 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,988 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,990 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,992 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,994 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:09,994 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-03-04 16:40:09,995 INFO L309 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:10,156 INFO L309 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:10,167 INFO L309 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:10,180 INFO L309 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:10,192 INFO L309 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:10,207 INFO L309 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:10,237 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,243 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-03-04 16:40:10,243 INFO L309 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:10,244 INFO L309 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-03-04 16:40:10,271 INFO L309 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-03-04 16:40:10,271 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:45, output treesize:46 [2019-03-04 16:40:10,301 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,303 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,305 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,307 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,309 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,311 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,313 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,315 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,316 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,316 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,317 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,318 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,319 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,320 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,321 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,322 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-03-04 16:40:10,322 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:10,344 INFO L309 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-03-04 16:40:10,344 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:48 [2019-03-04 16:40:10,377 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,378 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,379 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,379 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,380 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,382 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,383 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,384 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,385 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,386 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,387 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,388 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,389 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,391 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,392 INFO L188 IndexEqualityManager]: detected not equals via solver [2019-03-04 16:40:10,393 INFO L453 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2019-03-04 16:40:10,394 INFO L309 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-03-04 16:40:10,439 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 16:40:10,439 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:50 [2019-03-04 16:40:10,611 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 16:40:10,612 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-03-04 16:40:10,656 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 16:40:10,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-03-04 16:40:10,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-03-04 16:40:10,676 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-03-04 16:40:10,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-03-04 16:40:10,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-03-04 16:40:10,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-03-04 16:40:10,677 INFO L87 Difference]: Start difference. First operand 52 states and 244 transitions. Second operand 8 states. [2019-03-04 16:40:11,707 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-03-04 16:40:11,708 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:652) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:256) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:715) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2019-03-04 16:40:11,712 INFO L168 Benchmark]: Toolchain (without parser) took 81281.76 ms. Allocated memory was 138.9 MB in the beginning and 340.8 MB in the end (delta: 201.9 MB). Free memory was 107.3 MB in the beginning and 215.3 MB in the end (delta: -108.0 MB). Peak memory consumption was 93.8 MB. Max. memory is 7.1 GB. [2019-03-04 16:40:11,713 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory is still 108.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-03-04 16:40:11,713 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.35 ms. Allocated memory is still 138.9 MB. Free memory was 107.1 MB in the beginning and 104.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-03-04 16:40:11,713 INFO L168 Benchmark]: Boogie Preprocessor took 24.02 ms. Allocated memory is still 138.9 MB. Free memory was 104.8 MB in the beginning and 103.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-03-04 16:40:11,714 INFO L168 Benchmark]: RCFGBuilder took 489.00 ms. Allocated memory is still 138.9 MB. Free memory was 103.6 MB in the beginning and 91.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2019-03-04 16:40:11,714 INFO L168 Benchmark]: TraceAbstraction took 80701.79 ms. Allocated memory was 138.9 MB in the beginning and 340.8 MB in the end (delta: 201.9 MB). Free memory was 91.7 MB in the beginning and 215.3 MB in the end (delta: -123.6 MB). Peak memory consumption was 78.2 MB. Max. memory is 7.1 GB. [2019-03-04 16:40:11,716 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory is still 108.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 59.35 ms. Allocated memory is still 138.9 MB. Free memory was 107.1 MB in the beginning and 104.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.02 ms. Allocated memory is still 138.9 MB. Free memory was 104.8 MB in the beginning and 103.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 489.00 ms. Allocated memory is still 138.9 MB. Free memory was 103.6 MB in the beginning and 91.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 80701.79 ms. Allocated memory was 138.9 MB in the beginning and 340.8 MB in the end (delta: 201.9 MB). Free memory was 91.7 MB in the beginning and 215.3 MB in the end (delta: -123.6 MB). Peak memory consumption was 78.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...