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_array_oct.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-df3cc4e-m [2019-01-11 11:47:50,556 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-11 11:47:50,558 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-11 11:47:50,573 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-11 11:47:50,573 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-11 11:47:50,574 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-11 11:47:50,576 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-11 11:47:50,577 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-11 11:47:50,579 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-11 11:47:50,580 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-11 11:47:50,581 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-11 11:47:50,607 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2019-01-11 11:47:50,630 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-11 11:47:50,631 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-11 11:47:50,631 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-11 11:47:50,632 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-11 11:47:50,632 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-11 11:47:50,632 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-11 11:47:50,632 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-11 11:47:50,632 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-11 11:47:50,633 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-11 11:47:50,633 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-11 11:47:50,633 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-11 11:47:50,634 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-11 11:47:50,634 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-11 11:47:50,635 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-11 11:47:50,636 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-11 11:47:50,636 INFO L133 SettingsManager]: * Use SBE=true [2019-01-11 11:47:50,636 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-11 11:47:50,636 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-11 11:47:50,637 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-11 11:47:50,637 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-11 11:47:50,637 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-11 11:47:50,637 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-11 11:47:50,637 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-11 11:47:50,638 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-11 11:47:50,640 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-11 11:47:50,640 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-11 11:47:50,640 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-11 11:47:50,640 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-11 11:47:50,641 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-11 11:47:50,641 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-11 11:47:50,641 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-11 11:47:50,641 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-11 11:47:50,642 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-11 11:47:50,642 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-11 11:47:50,642 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-11 11:47:50,642 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-11 11:47:50,642 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-11 11:47:50,642 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-11 11:47:50,643 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-11 11:47:50,686 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-11 11:47:50,696 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-11 11:47:50,700 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-11 11:47:50,701 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-11 11:47:50,701 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-11 11:47:50,702 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl [2019-01-11 11:47:50,702 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl' [2019-01-11 11:47:50,745 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-11 11:47:50,748 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-11 11:47:50,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-11 11:47:50,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-11 11:47:50,749 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-11 11:47:50,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:47:50" (1/1) ... [2019-01-11 11:47:50,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:47:50" (1/1) ... [2019-01-11 11:47:50,808 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-11 11:47:50,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-11 11:47:50,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-11 11:47:50,809 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-11 11:47:50,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:47:50" (1/1) ... [2019-01-11 11:47:50,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:47:50" (1/1) ... [2019-01-11 11:47:50,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:47:50" (1/1) ... [2019-01-11 11:47:50,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:47:50" (1/1) ... [2019-01-11 11:47:50,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:47:50" (1/1) ... [2019-01-11 11:47:50,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:47:50" (1/1) ... [2019-01-11 11:47:50,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:47:50" (1/1) ... [2019-01-11 11:47:50,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-11 11:47:50,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-11 11:47:50,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-11 11:47:50,844 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-11 11:47:50,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:47:50" (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:8192 -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:8192 -smt2 -in -t:2000 [2019-01-11 11:47:50,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-11 11:47:50,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-11 11:47:51,315 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-11 11:47:51,316 INFO L286 CfgBuilder]: Removed 21 assue(true) statements. [2019-01-11 11:47:51,317 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 11:47:51 BoogieIcfgContainer [2019-01-11 11:47:51,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-11 11:47:51,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-11 11:47:51,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-11 11:47:51,322 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-11 11:47:51,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:47:50" (1/2) ... [2019-01-11 11:47:51,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39742579 and model type speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 11:47:51, skipping insertion in model container [2019-01-11 11:47:51,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 11:47:51" (2/2) ... [2019-01-11 11:47:51,326 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-9-unlimited.bpl [2019-01-11 11:47:51,337 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-11 11:47:51,345 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-01-11 11:47:51,362 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-01-11 11:47:51,395 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-11 11:47:51,395 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-11 11:47:51,396 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-11 11:47:51,396 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-11 11:47:51,396 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-11 11:47:51,396 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-11 11:47:51,396 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-11 11:47:51,397 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-11 11:47:51,414 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-01-11 11:47:51,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-11 11:47:51,422 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:47:51,423 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-11 11:47:51,426 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:47:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:47:51,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1000, now seen corresponding path program 1 times [2019-01-11 11:47:51,440 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:47:51,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:47:51,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:47:51,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:47:51,491 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:47:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:47:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:47:51,663 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 11:47:51,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 11:47:51,663 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:47:51,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 11:47:51,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 11:47:51,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:47:51,684 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-01-11 11:47:51,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:47:51,926 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2019-01-11 11:47:51,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 11:47:51,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-11 11:47:51,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:47:51,942 INFO L225 Difference]: With dead ends: 41 [2019-01-11 11:47:51,942 INFO L226 Difference]: Without dead ends: 36 [2019-01-11 11:47:51,945 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:47:51,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-11 11:47:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 20. [2019-01-11 11:47:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-01-11 11:47:51,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 37 transitions. [2019-01-11 11:47:51,996 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 37 transitions. Word has length 2 [2019-01-11 11:47:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:47:51,997 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 37 transitions. [2019-01-11 11:47:51,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 11:47:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 37 transitions. [2019-01-11 11:47:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:47:51,998 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:47:51,998 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:47:51,999 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:47:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:47:51,999 INFO L82 PathProgramCache]: Analyzing trace with hash 30388, now seen corresponding path program 1 times [2019-01-11 11:47:52,000 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:47:52,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:47:52,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:47:52,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:47:52,001 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:47:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:47:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:47:52,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:47:52,160 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:47:52,161 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:47:52,163 INFO L207 CegarAbsIntRunner]: [0], [18], [39] [2019-01-11 11:47:52,226 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 11:47:52,227 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:47:53,544 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:47:53,546 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:47:53,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:47:53,557 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:47:53,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:47:53,557 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:47:53,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:47:53,572 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:47:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:47:53,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:47:53,845 WARN L181 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-01-11 11:47:53,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-11 11:47:53,888 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-11 11:47:53,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:53,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:53,955 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-11 11:47:53,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-11 11:47:54,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,158 INFO L303 Elim1Store]: Index analysis took 114 ms [2019-01-11 11:47:54,160 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-11 11:47:54,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,277 INFO L303 Elim1Store]: Index analysis took 113 ms [2019-01-11 11:47:54,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-11 11:47:54,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,436 INFO L303 Elim1Store]: Index analysis took 153 ms [2019-01-11 11:47:54,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-11 11:47:54,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:54,549 INFO L303 Elim1Store]: Index analysis took 102 ms [2019-01-11 11:47:54,551 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-11 11:47:54,737 INFO L303 Elim1Store]: Index analysis took 177 ms [2019-01-11 11:47:54,740 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-11 11:47:54,744 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 11:47:55,150 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:47:55,467 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:47:55,536 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:47:55,589 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:47:55,623 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:47:55,676 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:47:55,703 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:47:55,745 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:47:55,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:55,866 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 11:47:55,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:55,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:55,931 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 11:47:56,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 11:47:56,128 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-11 11:47:56,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 11:47:56,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 11:47:56,373 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 11:47:56,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,389 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 11:47:56,600 WARN L181 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 11:47:56,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:56,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 11:47:56,628 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 11:47:56,688 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:47:56,744 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:47:56,802 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:47:56,866 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:47:56,932 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:47:56,993 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:47:57,091 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 11:47:57,092 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 11:47:57,234 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-01-11 11:47:57,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:47:57,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 153 [2019-01-11 11:47:57,274 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:47:57,453 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 11:47:57,453 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 11:47:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:47:57,475 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:47:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:47:57,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:47:57,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:47:57,515 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:47:57,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:47:57,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:47:57,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:47:57,517 INFO L87 Difference]: Start difference. First operand 20 states and 37 transitions. Second operand 6 states. [2019-01-11 11:48:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:48:09,521 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2019-01-11 11:48:09,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:48:09,521 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 11:48:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:48:09,523 INFO L225 Difference]: With dead ends: 71 [2019-01-11 11:48:09,523 INFO L226 Difference]: Without dead ends: 69 [2019-01-11 11:48:09,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 11:48:09,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-01-11 11:48:09,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 24. [2019-01-11 11:48:09,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-01-11 11:48:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 52 transitions. [2019-01-11 11:48:09,530 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 52 transitions. Word has length 3 [2019-01-11 11:48:09,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:48:09,531 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 52 transitions. [2019-01-11 11:48:09,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:48:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 52 transitions. [2019-01-11 11:48:09,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:48:09,531 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:48:09,532 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:48:09,532 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:48:09,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:48:09,532 INFO L82 PathProgramCache]: Analyzing trace with hash 30884, now seen corresponding path program 1 times [2019-01-11 11:48:09,533 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:48:09,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:48:09,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:48:09,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:48:09,534 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:48:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:48:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:48:09,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:48:09,658 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:48:09,658 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:48:09,658 INFO L207 CegarAbsIntRunner]: [0], [34], [39] [2019-01-11 11:48:09,661 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 11:48:09,661 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:48:10,157 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:48:10,157 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:48:10,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:48:10,157 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:48:10,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:48:10,158 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:48:10,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:48:10,176 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:48:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:48:10,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:48:10,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 11:48:10,486 WARN L181 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-01-11 11:48:10,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,494 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 11:48:10,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,576 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 11:48:10,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,657 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 11:48:10,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 11:48:10,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:10,882 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 11:48:11,027 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 11:48:11,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:11,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:11,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:11,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:11,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:11,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:11,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:11,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:11,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:11,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:11,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:11,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:11,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 11:48:11,056 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:48:11,114 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:11,171 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:11,231 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:11,292 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:11,380 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:11,441 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:11,519 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-11 11:48:11,523 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-11 11:48:11,543 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-11 11:48:11,564 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-11 11:48:11,585 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-11 11:48:11,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-11 11:48:11,623 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-11 11:48:11,644 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-11 11:48:11,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-11 11:48:11,702 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 11:48:11,784 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:11,847 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:11,900 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:11,942 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:11,978 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:12,000 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:12,020 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:12,039 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:12,140 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 11:48:12,140 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 11:48:12,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:12,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-11 11:48:12,224 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:48:12,472 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 11:48:12,473 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 11:48:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:48:12,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:48:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:48:12,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:48:12,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:48:12,538 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:48:12,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:48:12,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:48:12,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:48:12,539 INFO L87 Difference]: Start difference. First operand 24 states and 52 transitions. Second operand 6 states. [2019-01-11 11:48:23,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:48:23,689 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-01-11 11:48:23,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-11 11:48:23,690 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 11:48:23,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:48:23,692 INFO L225 Difference]: With dead ends: 54 [2019-01-11 11:48:23,692 INFO L226 Difference]: Without dead ends: 52 [2019-01-11 11:48:23,693 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:48:23,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-11 11:48:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 29. [2019-01-11 11:48:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-11 11:48:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 69 transitions. [2019-01-11 11:48:23,700 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 69 transitions. Word has length 3 [2019-01-11 11:48:23,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:48:23,700 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 69 transitions. [2019-01-11 11:48:23,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:48:23,700 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 69 transitions. [2019-01-11 11:48:23,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:48:23,701 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:48:23,701 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:48:23,701 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:48:23,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:48:23,701 INFO L82 PathProgramCache]: Analyzing trace with hash 30946, now seen corresponding path program 1 times [2019-01-11 11:48:23,702 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:48:23,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:48:23,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:48:23,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:48:23,703 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:48:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:48:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:48:23,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:48:23,845 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:48:23,846 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:48:23,846 INFO L207 CegarAbsIntRunner]: [0], [36], [39] [2019-01-11 11:48:23,847 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 11:48:23,848 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:48:26,900 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:48:26,901 INFO L272 AbstractInterpreter]: Visited 3 different actions 11 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:48:26,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:48:26,902 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:48:26,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:48:26,902 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:48:26,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:48:26,917 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:48:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:48:26,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:48:27,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-11 11:48:27,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-11 11:48:27,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-11 11:48:27,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,029 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-11 11:48:27,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,047 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-11 11:48:27,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-11 11:48:27,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,137 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-11 11:48:27,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,170 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-11 11:48:27,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-11 11:48:27,190 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 11:48:27,292 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:27,358 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:27,406 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:27,442 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:27,471 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:27,499 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:27,524 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:27,545 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:27,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 11:48:27,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,668 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 11:48:27,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 11:48:27,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,815 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 11:48:27,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:27,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 11:48:28,045 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 11:48:28,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 11:48:28,187 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 11:48:28,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:28,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 11:48:28,207 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 11:48:28,268 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:28,327 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:28,384 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:28,443 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:28,505 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:28,570 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:48:28,679 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 11:48:28,680 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 11:48:30,496 WARN L181 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 88 [2019-01-11 11:48:30,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:48:30,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 29 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 16 case distinctions, treesize of input 56 treesize of output 190 [2019-01-11 11:48:30,642 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-01-11 11:48:30,806 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 256 xjuncts. [2019-01-11 11:48:34,996 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-1 vars, End of recursive call: 64 dim-0 vars, and 9 xjuncts. [2019-01-11 11:48:34,997 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:168, output treesize:1223 [2019-01-11 11:50:17,950 WARN L181 SmtUtils]: Spent 1.67 m on a formula simplification that was a NOOP. DAG size: 652 [2019-01-11 11:50:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:50:17,954 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:50:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:50:17,977 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-11 11:50:17,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-11 11:50:17,978 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:50:17,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-11 11:50:17,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-11 11:50:17,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-11 11:50:17,979 INFO L87 Difference]: Start difference. First operand 29 states and 69 transitions. Second operand 4 states. [2019-01-11 11:50:18,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:50:18,066 INFO L93 Difference]: Finished difference Result 31 states and 80 transitions. [2019-01-11 11:50:18,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 11:50:18,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-11 11:50:18,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:50:18,068 INFO L225 Difference]: With dead ends: 31 [2019-01-11 11:50:18,068 INFO L226 Difference]: Without dead ends: 30 [2019-01-11 11:50:18,069 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 104.8s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-11 11:50:18,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-11 11:50:18,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-01-11 11:50:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-11 11:50:18,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 79 transitions. [2019-01-11 11:50:18,075 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 79 transitions. Word has length 3 [2019-01-11 11:50:18,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:50:18,076 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 79 transitions. [2019-01-11 11:50:18,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-11 11:50:18,076 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 79 transitions. [2019-01-11 11:50:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:50:18,076 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:50:18,076 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:50:18,077 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:50:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:50:18,077 INFO L82 PathProgramCache]: Analyzing trace with hash 31072, now seen corresponding path program 1 times [2019-01-11 11:50:18,077 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:50:18,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:50:18,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:50:18,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:50:18,078 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:50:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:50:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:50:18,161 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 11:50:18,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 11:50:18,161 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:50:18,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 11:50:18,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 11:50:18,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:50:18,162 INFO L87 Difference]: Start difference. First operand 30 states and 79 transitions. Second operand 3 states. [2019-01-11 11:50:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:50:18,235 INFO L93 Difference]: Finished difference Result 37 states and 80 transitions. [2019-01-11 11:50:18,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 11:50:18,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-11 11:50:18,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:50:18,236 INFO L225 Difference]: With dead ends: 37 [2019-01-11 11:50:18,237 INFO L226 Difference]: Without dead ends: 36 [2019-01-11 11:50:18,237 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:50:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-11 11:50:18,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-01-11 11:50:18,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-11 11:50:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 78 transitions. [2019-01-11 11:50:18,243 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 78 transitions. Word has length 3 [2019-01-11 11:50:18,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:50:18,243 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 78 transitions. [2019-01-11 11:50:18,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 11:50:18,243 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 78 transitions. [2019-01-11 11:50:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:50:18,244 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:50:18,244 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:50:18,244 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:50:18,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:50:18,245 INFO L82 PathProgramCache]: Analyzing trace with hash 30140, now seen corresponding path program 1 times [2019-01-11 11:50:18,245 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:50:18,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:50:18,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:50:18,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:50:18,246 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:50:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:50:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:50:18,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:50:18,369 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:50:18,369 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:50:18,369 INFO L207 CegarAbsIntRunner]: [0], [10], [39] [2019-01-11 11:50:18,372 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 11:50:18,372 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:50:18,752 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:50:18,752 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:50:18,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:50:18,752 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:50:18,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:50:18,753 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:50:18,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:50:18,770 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:50:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:50:18,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:50:18,885 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-11 11:50:18,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-11 11:50:18,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-11 11:50:18,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-11 11:50:18,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-11 11:50:18,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-11 11:50:18,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,956 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-11 11:50:18,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:18,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-11 11:50:18,998 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-11 11:50:18,999 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 11:50:19,234 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:19,304 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:19,357 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:19,409 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:19,443 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:19,469 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:19,491 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:19,513 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:19,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,566 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 11:50:19,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,622 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 11:50:19,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,688 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 11:50:19,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,767 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 11:50:19,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:19,866 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 11:50:20,031 WARN L181 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 11:50:20,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 11:50:20,252 WARN L181 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 11:50:20,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 11:50:20,307 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 11:50:20,365 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:20,424 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:20,485 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:20,547 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:20,613 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:20,674 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:20,777 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 11:50:20,778 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 11:50:20,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:20,862 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-11 11:50:20,862 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:50:21,058 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 11:50:21,058 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 11:50:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:50:21,080 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:50:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:50:21,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:50:21,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:50:21,110 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:50:21,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:50:21,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:50:21,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:50:21,111 INFO L87 Difference]: Start difference. First operand 30 states and 78 transitions. Second operand 6 states. [2019-01-11 11:50:33,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:50:33,281 INFO L93 Difference]: Finished difference Result 71 states and 131 transitions. [2019-01-11 11:50:33,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:50:33,282 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 11:50:33,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:50:33,283 INFO L225 Difference]: With dead ends: 71 [2019-01-11 11:50:33,283 INFO L226 Difference]: Without dead ends: 70 [2019-01-11 11:50:33,284 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 11:50:33,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-11 11:50:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 31. [2019-01-11 11:50:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-11 11:50:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 88 transitions. [2019-01-11 11:50:33,300 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 88 transitions. Word has length 3 [2019-01-11 11:50:33,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:50:33,300 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 88 transitions. [2019-01-11 11:50:33,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:50:33,300 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 88 transitions. [2019-01-11 11:50:33,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:50:33,301 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:50:33,301 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:50:33,301 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:50:33,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:50:33,302 INFO L82 PathProgramCache]: Analyzing trace with hash 30636, now seen corresponding path program 1 times [2019-01-11 11:50:33,302 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:50:33,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:50:33,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:50:33,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:50:33,303 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:50:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:50:33,541 WARN L181 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2019-01-11 11:50:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:50:33,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:50:33,545 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:50:33,545 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:50:33,545 INFO L207 CegarAbsIntRunner]: [0], [26], [39] [2019-01-11 11:50:33,546 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 11:50:33,546 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:50:33,845 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:50:33,845 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:50:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:50:33,846 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:50:33,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:50:33,846 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:50:33,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:50:33,858 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:50:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:50:33,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:50:33,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:33,917 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 11:50:33,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:33,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:33,975 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 11:50:34,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 11:50:34,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,115 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 11:50:34,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 11:50:34,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 11:50:34,449 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 11:50:34,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:34,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 11:50:34,470 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:50:34,526 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:34,585 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:34,651 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:34,712 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:34,772 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:34,835 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:34,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-11 11:50:34,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-11 11:50:34,915 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-11 11:50:34,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-11 11:50:34,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-11 11:50:34,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-11 11:50:34,937 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-11 11:50:34,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-11 11:50:35,107 INFO L303 Elim1Store]: Index analysis took 153 ms [2019-01-11 11:50:35,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-11 11:50:35,108 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 11:50:35,188 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:35,251 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:35,297 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:35,334 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:35,364 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:35,389 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:35,408 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:35,551 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:35,655 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 11:50:35,655 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 11:50:36,323 WARN L181 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-01-11 11:50:36,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:36,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-11 11:50:36,364 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:50:36,460 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 11:50:36,461 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 11:50:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:50:36,495 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:50:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:50:36,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:50:36,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:50:36,523 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:50:36,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:50:36,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:50:36,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:50:36,524 INFO L87 Difference]: Start difference. First operand 31 states and 88 transitions. Second operand 6 states. [2019-01-11 11:50:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:50:48,815 INFO L93 Difference]: Finished difference Result 72 states and 141 transitions. [2019-01-11 11:50:48,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:50:48,815 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 11:50:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:50:48,817 INFO L225 Difference]: With dead ends: 72 [2019-01-11 11:50:48,817 INFO L226 Difference]: Without dead ends: 70 [2019-01-11 11:50:48,817 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 11:50:48,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-11 11:50:48,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 32. [2019-01-11 11:50:48,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-11 11:50:48,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 97 transitions. [2019-01-11 11:50:48,824 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 97 transitions. Word has length 3 [2019-01-11 11:50:48,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:50:48,825 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 97 transitions. [2019-01-11 11:50:48,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:50:48,825 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 97 transitions. [2019-01-11 11:50:48,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:50:48,825 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:50:48,826 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:50:48,826 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:50:48,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:50:48,826 INFO L82 PathProgramCache]: Analyzing trace with hash 941912, now seen corresponding path program 1 times [2019-01-11 11:50:48,826 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:50:48,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:50:48,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:50:48,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:50:48,827 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:50:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:50:49,009 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2019-01-11 11:50:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:50:49,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:50:49,026 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:50:49,027 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:50:49,027 INFO L207 CegarAbsIntRunner]: [0], [18], [34], [39] [2019-01-11 11:50:49,029 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 11:50:49,029 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:50:49,428 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:50:49,428 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-11 11:50:49,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:50:49,428 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:50:49,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:50:49,429 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:50:49,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:50:49,443 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:50:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:50:49,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:50:49,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 11:50:49,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,570 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 11:50:49,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,647 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 11:50:49,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,740 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 11:50:49,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 11:50:49,951 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 11:50:49,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:49,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,022 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 11:50:50,158 WARN L181 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 11:50:50,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:50,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 11:50:50,211 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:50:50,352 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:50,436 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:50,532 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:50,628 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:50,726 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:50,829 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:50,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-11 11:50:50,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-11 11:50:50,955 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-11 11:50:50,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-11 11:50:50,965 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-11 11:50:50,970 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-11 11:50:50,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-11 11:50:50,982 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-11 11:50:50,997 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-11 11:50:50,998 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 11:50:51,077 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:51,146 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:51,194 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:51,228 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:51,258 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:51,282 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:51,303 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:51,322 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:51,426 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:50:51,426 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:150, output treesize:158 [2019-01-11 11:50:51,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:51,515 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 153 [2019-01-11 11:50:51,516 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:50:51,611 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:50:51,611 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-11 11:50:51,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:51,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:51,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:51,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:51,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:51,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:51,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:51,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:51,675 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 11:50:51,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 168 [2019-01-11 11:50:51,678 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:50:51,777 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 11:50:51,777 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-11 11:50:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:50:51,801 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:50:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:50:51,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:50:51,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:50:51,852 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:50:51,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:50:51,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:50:51,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:50:51,853 INFO L87 Difference]: Start difference. First operand 32 states and 97 transitions. Second operand 8 states. [2019-01-11 11:50:55,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:50:55,246 INFO L93 Difference]: Finished difference Result 89 states and 175 transitions. [2019-01-11 11:50:55,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 11:50:55,246 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:50:55,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:50:55,247 INFO L225 Difference]: With dead ends: 89 [2019-01-11 11:50:55,247 INFO L226 Difference]: Without dead ends: 87 [2019-01-11 11:50:55,248 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-01-11 11:50:55,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-01-11 11:50:55,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 37. [2019-01-11 11:50:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-01-11 11:50:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 107 transitions. [2019-01-11 11:50:55,257 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 107 transitions. Word has length 4 [2019-01-11 11:50:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:50:55,258 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 107 transitions. [2019-01-11 11:50:55,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:50:55,258 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 107 transitions. [2019-01-11 11:50:55,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:50:55,258 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:50:55,258 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:50:55,259 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:50:55,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:50:55,259 INFO L82 PathProgramCache]: Analyzing trace with hash 941974, now seen corresponding path program 1 times [2019-01-11 11:50:55,259 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:50:55,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:50:55,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:50:55,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:50:55,260 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:50:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:50:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:50:55,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:50:55,403 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:50:55,403 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:50:55,403 INFO L207 CegarAbsIntRunner]: [0], [18], [36], [39] [2019-01-11 11:50:55,404 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 11:50:55,405 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:50:55,881 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:50:55,881 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-11 11:50:55,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:50:55,881 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:50:55,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:50:55,882 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:50:55,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:50:55,897 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:50:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:50:55,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:50:55,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-11 11:50:55,997 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-11 11:50:56,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,005 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-11 11:50:56,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-11 11:50:56,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,208 INFO L303 Elim1Store]: Index analysis took 106 ms [2019-01-11 11:50:56,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-11 11:50:56,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,319 INFO L303 Elim1Store]: Index analysis took 109 ms [2019-01-11 11:50:56,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-11 11:50:56,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-11 11:50:56,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,435 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-11 11:50:56,449 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-11 11:50:56,450 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 11:50:56,534 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:56,597 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:56,650 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:56,691 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:56,720 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:56,747 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:56,769 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:56,792 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:56,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,853 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 11:50:56,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,935 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 11:50:56,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:56,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,000 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 11:50:57,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 11:50:57,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 11:50:57,266 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 11:50:57,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 11:50:57,459 WARN L181 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 11:50:57,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:57,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 11:50:57,478 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 11:50:57,547 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:57,747 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:57,807 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:57,868 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:57,931 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:57,993 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:50:58,097 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 11:50:58,098 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:150, output treesize:158 [2019-01-11 11:50:58,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:58,375 INFO L303 Elim1Store]: Index analysis took 242 ms [2019-01-11 11:50:58,507 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 29 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 162 [2019-01-11 11:50:58,509 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-11 11:50:58,903 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 13 dim-0 vars, and 2 xjuncts. [2019-01-11 11:50:58,903 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:168, output treesize:258 [2019-01-11 11:50:59,041 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-01-11 11:50:59,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,107 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 11:50:59,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 211 [2019-01-11 11:50:59,110 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:50:59,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:50:59,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 32 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 142 treesize of output 204 [2019-01-11 11:50:59,458 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-11 11:50:59,511 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 128 xjuncts. [2019-01-11 11:51:02,111 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 2 dim-1 vars, End of recursive call: 64 dim-0 vars, and 9 xjuncts. [2019-01-11 11:51:02,111 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 17 variables, input treesize:280, output treesize:1007 [2019-01-11 11:51:07,308 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:51:07,310 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:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:626) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:152) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:286) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:215) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 45 more [2019-01-11 11:51:07,315 INFO L168 Benchmark]: Toolchain (without parser) took 196568.86 ms. Allocated memory was 141.0 MB in the beginning and 326.6 MB in the end (delta: 185.6 MB). Free memory was 108.1 MB in the beginning and 171.9 MB in the end (delta: -63.8 MB). Peak memory consumption was 121.8 MB. Max. memory is 7.1 GB. [2019-01-11 11:51:07,315 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory is still 109.4 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-11 11:51:07,316 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.17 ms. Allocated memory is still 141.0 MB. Free memory was 108.1 MB in the beginning and 105.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2019-01-11 11:51:07,316 INFO L168 Benchmark]: Boogie Preprocessor took 34.56 ms. Allocated memory is still 141.0 MB. Free memory was 105.5 MB in the beginning and 104.6 MB in the end (delta: 900.1 kB). Peak memory consumption was 900.1 kB. Max. memory is 7.1 GB. [2019-01-11 11:51:07,316 INFO L168 Benchmark]: RCFGBuilder took 473.72 ms. Allocated memory is still 141.0 MB. Free memory was 104.2 MB in the beginning and 90.8 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2019-01-11 11:51:07,317 INFO L168 Benchmark]: TraceAbstraction took 195995.09 ms. Allocated memory was 141.0 MB in the beginning and 326.6 MB in the end (delta: 185.6 MB). Free memory was 90.4 MB in the beginning and 171.9 MB in the end (delta: -81.5 MB). Peak memory consumption was 104.1 MB. Max. memory is 7.1 GB. [2019-01-11 11:51:07,319 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory is still 109.4 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 60.17 ms. Allocated memory is still 141.0 MB. Free memory was 108.1 MB in the beginning and 105.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.56 ms. Allocated memory is still 141.0 MB. Free memory was 105.5 MB in the beginning and 104.6 MB in the end (delta: 900.1 kB). Peak memory consumption was 900.1 kB. Max. memory is 7.1 GB. * RCFGBuilder took 473.72 ms. Allocated memory is still 141.0 MB. Free memory was 104.2 MB in the beginning and 90.8 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 195995.09 ms. Allocated memory was 141.0 MB in the beginning and 326.6 MB in the end (delta: 185.6 MB). Free memory was 90.4 MB in the beginning and 171.9 MB in the end (delta: -81.5 MB). Peak memory consumption was 104.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...