java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-df3cc4e-m [2019-01-11 11:14:02,444 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-11 11:14:02,446 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-11 11:14:02,457 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-11 11:14:02,458 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-11 11:14:02,459 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-11 11:14:02,460 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-11 11:14:02,462 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-11 11:14:02,464 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-11 11:14:02,464 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-11 11:14:02,465 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-11 11:14:02,490 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-01-11 11:14:02,511 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-11 11:14:02,511 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-11 11:14:02,512 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-11 11:14:02,512 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-11 11:14:02,513 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-11 11:14:02,513 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-11 11:14:02,513 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-11 11:14:02,514 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-11 11:14:02,514 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-11 11:14:02,514 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-11 11:14:02,514 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-11 11:14:02,514 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-11 11:14:02,515 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-11 11:14:02,515 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-11 11:14:02,515 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-11 11:14:02,516 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-11 11:14:02,517 INFO L133 SettingsManager]: * Use SBE=true [2019-01-11 11:14:02,517 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-11 11:14:02,517 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-11 11:14:02,517 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-11 11:14:02,518 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-11 11:14:02,518 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-11 11:14:02,518 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-11 11:14:02,518 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-11 11:14:02,518 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-11 11:14:02,518 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-11 11:14:02,519 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-11 11:14:02,519 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-11 11:14:02,519 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-11 11:14:02,519 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-11 11:14:02,520 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-11 11:14:02,520 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-11 11:14:02,520 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-11 11:14:02,520 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-11 11:14:02,520 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-11 11:14:02,521 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-11 11:14:02,521 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-11 11:14:02,521 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-11 11:14:02,521 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-11 11:14:02,521 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-11 11:14:02,578 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-11 11:14:02,589 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-11 11:14:02,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-11 11:14:02,593 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-11 11:14:02,593 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-11 11:14:02,594 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl [2019-01-11 11:14:02,594 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl' [2019-01-11 11:14:02,641 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-11 11:14:02,643 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-11 11:14:02,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-11 11:14:02,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-11 11:14:02,644 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-11 11:14:02,660 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 11:14:02" (1/1) ... [2019-01-11 11:14:02,672 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 11:14:02" (1/1) ... [2019-01-11 11:14:02,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-11 11:14:02,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-11 11:14:02,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-11 11:14:02,701 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-11 11:14:02,712 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 11:14:02" (1/1) ... [2019-01-11 11:14:02,712 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 11:14:02" (1/1) ... [2019-01-11 11:14:02,715 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 11:14:02" (1/1) ... [2019-01-11 11:14:02,715 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 11:14:02" (1/1) ... [2019-01-11 11:14:02,725 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 11:14:02" (1/1) ... [2019-01-11 11:14:02,738 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 11:14:02" (1/1) ... [2019-01-11 11:14:02,739 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 11:14:02" (1/1) ... [2019-01-11 11:14:02,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-11 11:14:02,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-11 11:14:02,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-11 11:14:02,744 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-11 11:14:02,745 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 11:14:02" (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 11:14:02,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-11 11:14:02,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-11 11:14:03,222 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-11 11:14:03,222 INFO L286 CfgBuilder]: Removed 21 assue(true) statements. [2019-01-11 11:14:03,224 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 11:14:03 BoogieIcfgContainer [2019-01-11 11:14:03,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-11 11:14:03,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-11 11:14:03,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-11 11:14:03,228 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-11 11:14:03,228 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 11:14:02" (1/2) ... [2019-01-11 11:14:03,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54733073 and model type speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 11:14:03, skipping insertion in model container [2019-01-11 11:14:03,229 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 11:14:03" (2/2) ... [2019-01-11 11:14:03,231 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-9-unlimited.bpl [2019-01-11 11:14:03,240 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-11 11:14:03,248 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-01-11 11:14:03,261 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-01-11 11:14:03,289 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-11 11:14:03,289 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-11 11:14:03,289 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-11 11:14:03,289 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-11 11:14:03,290 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-11 11:14:03,290 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-11 11:14:03,290 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-11 11:14:03,290 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-11 11:14:03,303 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-01-11 11:14:03,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-11 11:14:03,310 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:14:03,311 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-11 11:14:03,313 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:14:03,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:03,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1000, now seen corresponding path program 1 times [2019-01-11 11:14:03,324 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:14:03,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:03,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:03,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:03,369 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:14:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:03,567 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 11:14:03,570 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 11:14:03,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 11:14:03,571 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:14:03,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 11:14:03,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 11:14:03,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:14:03,593 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-01-11 11:14:03,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:14:03,836 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2019-01-11 11:14:03,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 11:14:03,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-11 11:14:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:14:03,853 INFO L225 Difference]: With dead ends: 41 [2019-01-11 11:14:03,854 INFO L226 Difference]: Without dead ends: 36 [2019-01-11 11:14:03,857 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 11:14:03,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-11 11:14:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 20. [2019-01-11 11:14:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-01-11 11:14:03,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 37 transitions. [2019-01-11 11:14:03,911 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 37 transitions. Word has length 2 [2019-01-11 11:14:03,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:14:03,913 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 37 transitions. [2019-01-11 11:14:03,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 11:14:03,913 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 37 transitions. [2019-01-11 11:14:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:14:03,914 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:14:03,914 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:14:03,914 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:14:03,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:03,915 INFO L82 PathProgramCache]: Analyzing trace with hash 30388, now seen corresponding path program 1 times [2019-01-11 11:14:03,915 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:14:03,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:03,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:03,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:03,917 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:14:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:04,076 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 11:14:04,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:04,077 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:14:04,078 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:14:04,079 INFO L207 CegarAbsIntRunner]: [0], [18], [39] [2019-01-11 11:14:04,116 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:14:04,117 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:14:04,194 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:14:04,196 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:14:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:04,204 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:14:04,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:04,204 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 11:14:04,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:04,225 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:14:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:04,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:14:04,542 WARN L181 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-01-11 11:14:04,573 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 11:14:04,585 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 11:14:04,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:04,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:04,644 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 11:14:04,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:04,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:04,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:04,672 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 11:14:04,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:04,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:04,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:04,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:04,793 INFO L303 Elim1Store]: Index analysis took 115 ms [2019-01-11 11:14:04,795 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 11:14:04,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:04,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:04,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:04,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:04,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:04,902 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 11:14:04,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:04,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:04,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:05,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:05,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:05,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:05,007 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 11:14:05,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:05,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:05,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:05,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:05,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:05,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:05,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:05,075 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 11:14:05,140 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 11:14:05,143 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:05,533 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:05,896 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:05,962 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:06,020 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:06,056 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:06,109 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:06,138 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:06,176 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:06,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,299 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 11:14:06,446 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-01-11 11:14:06,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,468 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 11:14:06,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,615 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 11:14:06,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,730 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 11:14:06,854 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-11 11:14:06,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:06,893 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 11:14:07,023 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 11:14:07,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,059 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 11:14:07,316 WARN L181 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 11:14:07,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:07,380 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 11:14:07,383 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,473 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,534 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,595 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,707 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,778 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,841 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:07,959 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 11:14:07,959 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 11:14:08,157 WARN L181 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-01-11 11:14:08,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:08,263 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 11:14:08,267 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:08,488 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 11:14:08,489 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 11:14:08,522 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 11:14:08,523 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:14:08,538 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 11:14:08,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:14:08,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:14:08,559 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:14:08,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:14:08,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:14:08,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:14:08,561 INFO L87 Difference]: Start difference. First operand 20 states and 37 transitions. Second operand 6 states. [2019-01-11 11:14:20,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:14:20,569 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2019-01-11 11:14:20,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:14:20,569 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 11:14:20,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:14:20,571 INFO L225 Difference]: With dead ends: 71 [2019-01-11 11:14:20,571 INFO L226 Difference]: Without dead ends: 69 [2019-01-11 11:14:20,572 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 11:14:20,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-01-11 11:14:20,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 24. [2019-01-11 11:14:20,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-01-11 11:14:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 52 transitions. [2019-01-11 11:14:20,580 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 52 transitions. Word has length 3 [2019-01-11 11:14:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:14:20,580 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 52 transitions. [2019-01-11 11:14:20,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:14:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 52 transitions. [2019-01-11 11:14:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:14:20,581 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:14:20,581 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:14:20,582 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:14:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:20,582 INFO L82 PathProgramCache]: Analyzing trace with hash 30884, now seen corresponding path program 1 times [2019-01-11 11:14:20,582 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:14:20,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:20,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:20,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:20,583 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:14:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:20,689 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 11:14:20,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:20,690 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:14:20,690 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:14:20,690 INFO L207 CegarAbsIntRunner]: [0], [34], [39] [2019-01-11 11:14:20,692 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:14:20,692 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:14:20,701 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:14:20,702 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:14:20,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:20,702 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:14:20,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:20,702 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 11:14:20,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:20,714 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:14:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:20,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:14:20,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:20,802 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 11:14:20,909 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-01-11 11:14:20,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:20,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:20,917 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 11:14:20,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:20,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:20,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:20,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:20,984 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 11:14:21,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,096 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 11:14:21,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,204 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 11:14:21,390 WARN L181 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 11:14:21,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,409 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 11:14:21,548 WARN L181 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 11:14:21,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:21,662 INFO L303 Elim1Store]: Index analysis took 111 ms [2019-01-11 11:14:21,664 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 11:14:21,666 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:21,725 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:21,788 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:21,867 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:21,931 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:22,036 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:22,103 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:22,184 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 11:14:22,189 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 11:14:22,194 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 11:14:22,203 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 11:14:22,209 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 11:14:22,217 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 11:14:22,237 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 11:14:22,261 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 11:14:22,457 INFO L303 Elim1Store]: Index analysis took 192 ms [2019-01-11 11:14:22,458 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 11:14:22,460 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:22,666 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:22,743 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:22,795 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:22,833 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:22,864 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:22,888 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:22,910 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:22,930 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:23,037 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 11:14:23,038 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 11:14:23,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:23,102 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 11:14:23,103 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:23,344 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 11:14:23,345 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 11:14:23,372 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 11:14:23,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:14:23,387 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 11:14:23,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:14:23,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:14:23,407 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:14:23,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:14:23,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:14:23,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:14:23,409 INFO L87 Difference]: Start difference. First operand 24 states and 52 transitions. Second operand 6 states. [2019-01-11 11:14:34,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:14:34,833 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-01-11 11:14:34,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-11 11:14:34,834 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 11:14:34,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:14:34,835 INFO L225 Difference]: With dead ends: 54 [2019-01-11 11:14:34,835 INFO L226 Difference]: Without dead ends: 52 [2019-01-11 11:14:34,836 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 11:14:34,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-11 11:14:34,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 29. [2019-01-11 11:14:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-11 11:14:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 69 transitions. [2019-01-11 11:14:34,842 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 69 transitions. Word has length 3 [2019-01-11 11:14:34,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:14:34,842 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 69 transitions. [2019-01-11 11:14:34,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:14:34,843 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 69 transitions. [2019-01-11 11:14:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:14:34,843 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:14:34,843 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:14:34,843 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:14:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:34,844 INFO L82 PathProgramCache]: Analyzing trace with hash 30946, now seen corresponding path program 1 times [2019-01-11 11:14:34,844 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:14:34,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:34,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:34,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:14:34,845 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:14:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:34,996 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 11:14:34,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:34,997 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:14:34,997 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:14:34,997 INFO L207 CegarAbsIntRunner]: [0], [36], [39] [2019-01-11 11:14:34,998 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:14:34,998 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:14:35,006 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:14:35,007 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:14:35,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:14:35,007 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:14:35,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:14:35,008 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 11:14:35,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:14:35,017 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:14:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:14:35,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:14:35,097 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 11:14:35,101 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 11:14:35,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,111 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 11:14:35,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,163 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 11:14:35,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,178 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 11:14:35,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,196 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 11:14:35,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,279 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 11:14:35,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,335 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 11:14:35,406 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 11:14:35,408 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:35,517 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:35,587 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:35,640 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:35,678 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:35,710 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:35,737 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:35,759 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:35,785 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:35,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 11:14:35,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 11:14:35,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:35,962 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 11:14:36,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,039 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 11:14:36,165 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-11 11:14:36,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,199 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 11:14:36,304 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 11:14:36,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,331 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 11:14:36,472 WARN L181 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 11:14:36,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:36,491 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 11:14:36,493 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 11:14:36,551 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:36,613 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:36,673 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:36,737 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:36,808 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:36,903 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:14:37,020 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 11:14:37,020 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 11:14:38,887 WARN L181 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 88 [2019-01-11 11:14:38,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:14:39,035 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 11:14:39,036 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-01-11 11:14:39,226 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 256 xjuncts. [2019-01-11 11:14:43,327 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 11:14:43,328 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:168, output treesize:1335 [2019-01-11 11:16:24,682 WARN L181 SmtUtils]: Spent 1.64 m on a formula simplification that was a NOOP. DAG size: 708 [2019-01-11 11:16:24,687 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 11:16:24,687 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:16:24,736 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 11:16:24,754 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-11 11:16:24,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-11 11:16:24,754 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:16:24,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-11 11:16:24,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-11 11:16:24,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-11 11:16:24,755 INFO L87 Difference]: Start difference. First operand 29 states and 69 transitions. Second operand 4 states. [2019-01-11 11:16:24,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:16:24,811 INFO L93 Difference]: Finished difference Result 31 states and 80 transitions. [2019-01-11 11:16:24,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 11:16:24,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-11 11:16:24,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:16:24,813 INFO L225 Difference]: With dead ends: 31 [2019-01-11 11:16:24,813 INFO L226 Difference]: Without dead ends: 30 [2019-01-11 11:16:24,814 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 103.3s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-11 11:16:24,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-11 11:16:24,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-01-11 11:16:24,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-11 11:16:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 79 transitions. [2019-01-11 11:16:24,820 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 79 transitions. Word has length 3 [2019-01-11 11:16:24,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:16:24,820 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 79 transitions. [2019-01-11 11:16:24,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-11 11:16:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 79 transitions. [2019-01-11 11:16:24,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:16:24,821 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:16:24,821 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:16:24,822 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:16:24,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:16:24,822 INFO L82 PathProgramCache]: Analyzing trace with hash 31072, now seen corresponding path program 1 times [2019-01-11 11:16:24,822 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:16:24,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:16:24,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:16:24,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:16:24,823 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:16:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:16:24,896 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 11:16:24,896 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 11:16:24,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 11:16:24,897 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:16:24,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 11:16:24,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 11:16:24,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:16:24,897 INFO L87 Difference]: Start difference. First operand 30 states and 79 transitions. Second operand 3 states. [2019-01-11 11:16:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:16:25,016 INFO L93 Difference]: Finished difference Result 37 states and 80 transitions. [2019-01-11 11:16:25,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 11:16:25,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-11 11:16:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:16:25,017 INFO L225 Difference]: With dead ends: 37 [2019-01-11 11:16:25,017 INFO L226 Difference]: Without dead ends: 36 [2019-01-11 11:16:25,018 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 11:16:25,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-11 11:16:25,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-01-11 11:16:25,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-11 11:16:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 78 transitions. [2019-01-11 11:16:25,025 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 78 transitions. Word has length 3 [2019-01-11 11:16:25,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:16:25,026 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 78 transitions. [2019-01-11 11:16:25,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 11:16:25,026 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 78 transitions. [2019-01-11 11:16:25,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:16:25,026 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:16:25,026 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:16:25,027 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:16:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:16:25,027 INFO L82 PathProgramCache]: Analyzing trace with hash 30140, now seen corresponding path program 1 times [2019-01-11 11:16:25,027 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:16:25,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:16:25,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:16:25,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:16:25,028 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:16:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:16:25,137 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 11:16:25,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:16:25,137 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:16:25,138 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:16:25,138 INFO L207 CegarAbsIntRunner]: [0], [10], [39] [2019-01-11 11:16:25,139 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:16:25,139 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:16:25,146 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:16:25,146 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:16:25,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:16:25,147 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:16:25,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:16:25,147 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 11:16:25,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:16:25,163 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:16:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:16:25,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:16:25,235 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 11:16:25,239 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 11:16:25,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,305 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 11:16:25,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,367 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 11:16:25,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,382 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 11:16:25,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,425 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 11:16:25,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,531 INFO L303 Elim1Store]: Index analysis took 103 ms [2019-01-11 11:16:25,532 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 11:16:25,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:25,550 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 11:16:25,600 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 11:16:25,601 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:25,732 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:25,795 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:25,843 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:25,879 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:25,910 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:25,934 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:25,960 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:25,979 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:26,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,036 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 11:16:26,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,091 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 11:16:26,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 11:16:26,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,246 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 11:16:26,408 WARN L181 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-11 11:16:26,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,423 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 11:16:26,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,535 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 11:16:26,656 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 11:16:26,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:26,674 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 11:16:26,675 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:26,730 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:26,785 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:26,840 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:26,898 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:26,956 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:27,015 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:27,112 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 11:16:27,112 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 11:16:27,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:27,154 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 11:16:27,155 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:27,246 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 11:16:27,247 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 11:16:27,267 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 11:16:27,268 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:16:27,279 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 11:16:27,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:16:27,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:16:27,298 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:16:27,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:16:27,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:16:27,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:16:27,299 INFO L87 Difference]: Start difference. First operand 30 states and 78 transitions. Second operand 6 states. [2019-01-11 11:16:39,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:16:39,142 INFO L93 Difference]: Finished difference Result 71 states and 131 transitions. [2019-01-11 11:16:39,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:16:39,142 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 11:16:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:16:39,144 INFO L225 Difference]: With dead ends: 71 [2019-01-11 11:16:39,144 INFO L226 Difference]: Without dead ends: 70 [2019-01-11 11:16:39,145 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 11:16:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-11 11:16:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 31. [2019-01-11 11:16:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-11 11:16:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 88 transitions. [2019-01-11 11:16:39,153 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 88 transitions. Word has length 3 [2019-01-11 11:16:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:16:39,153 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 88 transitions. [2019-01-11 11:16:39,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:16:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 88 transitions. [2019-01-11 11:16:39,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:16:39,154 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:16:39,154 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:16:39,154 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:16:39,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:16:39,155 INFO L82 PathProgramCache]: Analyzing trace with hash 30636, now seen corresponding path program 1 times [2019-01-11 11:16:39,155 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:16:39,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:16:39,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:16:39,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:16:39,156 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:16:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:16:39,237 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 11:16:39,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:16:39,237 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:16:39,237 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:16:39,238 INFO L207 CegarAbsIntRunner]: [0], [26], [39] [2019-01-11 11:16:39,239 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:16:39,239 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:16:39,245 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:16:39,246 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 11:16:39,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:16:39,246 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:16:39,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:16:39,246 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 11:16:39,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:16:39,260 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:16:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:16:39,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:16:39,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,318 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 11:16:39,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,371 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 11:16:39,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,432 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 11:16:39,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,533 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 11:16:39,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,620 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 11:16:39,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,753 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 11:16:39,874 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 11:16:39,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:39,915 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 11:16:39,916 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:39,975 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:40,034 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:40,091 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:40,152 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:40,209 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:40,269 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:40,342 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 11:16:40,346 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 11:16:40,349 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 11:16:40,353 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 11:16:40,363 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 11:16:40,367 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 11:16:40,371 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 11:16:40,385 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 11:16:40,397 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 11:16:40,398 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:40,472 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:40,530 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:40,574 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:40,609 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:40,636 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:40,664 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:40,683 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:40,701 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:40,799 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 11:16:40,799 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 11:16:41,187 WARN L181 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-01-11 11:16:41,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:41,210 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 11:16:41,211 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:41,302 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 11:16:41,303 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 11:16:41,326 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 11:16:41,327 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:16:41,339 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 11:16:41,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:16:41,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:16:41,357 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:16:41,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:16:41,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:16:41,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:16:41,358 INFO L87 Difference]: Start difference. First operand 31 states and 88 transitions. Second operand 6 states. [2019-01-11 11:16:54,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:16:54,189 INFO L93 Difference]: Finished difference Result 72 states and 141 transitions. [2019-01-11 11:16:54,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:16:54,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 11:16:54,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:16:54,190 INFO L225 Difference]: With dead ends: 72 [2019-01-11 11:16:54,190 INFO L226 Difference]: Without dead ends: 70 [2019-01-11 11:16:54,191 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 11:16:54,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-11 11:16:54,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 32. [2019-01-11 11:16:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-11 11:16:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 97 transitions. [2019-01-11 11:16:54,199 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 97 transitions. Word has length 3 [2019-01-11 11:16:54,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:16:54,199 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 97 transitions. [2019-01-11 11:16:54,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:16:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 97 transitions. [2019-01-11 11:16:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:16:54,199 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:16:54,199 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:16:54,200 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:16:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:16:54,200 INFO L82 PathProgramCache]: Analyzing trace with hash 941912, now seen corresponding path program 1 times [2019-01-11 11:16:54,200 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:16:54,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:16:54,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:16:54,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:16:54,201 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:16:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:16:54,299 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 11:16:54,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:16:54,300 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:16:54,300 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:16:54,300 INFO L207 CegarAbsIntRunner]: [0], [18], [34], [39] [2019-01-11 11:16:54,302 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:16:54,302 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:16:54,308 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:16:54,308 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 96 root evaluator evaluations with a maximum evaluation depth of 2. Performed 96 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:16:54,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:16:54,309 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:16:54,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:16:54,309 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 11:16:54,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:16:54,317 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:16:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:16:54,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:16:54,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,365 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 11:16:54,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,428 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 11:16:54,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,499 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 11:16:54,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,593 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 11:16:54,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,700 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 11:16:54,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,852 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 11:16:54,982 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 11:16:54,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:54,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:55,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:55,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:55,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:55,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:55,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:55,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:55,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:55,013 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 11:16:55,013 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:55,098 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:55,186 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:55,281 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:55,376 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:55,473 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:55,572 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:55,683 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 11:16:55,686 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 11:16:55,689 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 11:16:55,696 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 11:16:55,699 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 11:16:55,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 11:16:55,711 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 11:16:55,716 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 11:16:55,731 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 11:16:55,732 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:55,806 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:55,912 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:55,957 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:55,991 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:56,019 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:56,042 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:56,061 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:56,078 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:16:56,175 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 11:16:56,175 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:150, output treesize:158 [2019-01-11 11:16:56,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:56,295 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 11:16:56,296 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:56,586 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 11:16:56,587 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-11 11:16:56,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:56,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:56,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:56,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:56,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:56,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:56,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:56,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:16:56,624 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 11:16:56,625 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 11:16:56,626 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:16:56,718 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 11:16:56,718 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-11 11:16:56,745 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 11:16:56,745 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:16:57,056 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 11:16:57,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:16:57,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:16:57,077 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:16:57,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:16:57,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:16:57,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:16:57,078 INFO L87 Difference]: Start difference. First operand 32 states and 97 transitions. Second operand 8 states. [2019-01-11 11:17:00,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:17:00,390 INFO L93 Difference]: Finished difference Result 89 states and 175 transitions. [2019-01-11 11:17:00,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 11:17:00,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:17:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:17:00,392 INFO L225 Difference]: With dead ends: 89 [2019-01-11 11:17:00,392 INFO L226 Difference]: Without dead ends: 87 [2019-01-11 11:17:00,393 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-01-11 11:17:00,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-01-11 11:17:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 37. [2019-01-11 11:17:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-01-11 11:17:00,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 107 transitions. [2019-01-11 11:17:00,401 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 107 transitions. Word has length 4 [2019-01-11 11:17:00,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:17:00,401 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 107 transitions. [2019-01-11 11:17:00,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:17:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 107 transitions. [2019-01-11 11:17:00,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:17:00,402 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:17:00,402 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:17:00,402 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:17:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:17:00,402 INFO L82 PathProgramCache]: Analyzing trace with hash 941974, now seen corresponding path program 1 times [2019-01-11 11:17:00,403 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:17:00,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:17:00,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:17:00,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:17:00,404 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:17:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:17:00,864 WARN L181 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 13 [2019-01-11 11:17:00,903 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 11:17:00,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:17:00,903 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:17:00,903 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:17:00,904 INFO L207 CegarAbsIntRunner]: [0], [18], [36], [39] [2019-01-11 11:17:00,905 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 11:17:00,905 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:17:00,911 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:17:00,911 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 96 root evaluator evaluations with a maximum evaluation depth of 2. Performed 96 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:17:00,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:17:00,911 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:17:00,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:17:00,912 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 11:17:00,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:17:00,921 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:17:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:17:00,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:17:00,958 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 11:17:00,963 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 11:17:00,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:00,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:00,968 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 11:17:00,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:00,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:00,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:00,980 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 11:17:00,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:00,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:00,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:00,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:00,992 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 11:17:01,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,057 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 11:17:01,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,072 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 11:17:01,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,089 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 11:17:01,104 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 11:17:01,105 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 11:17:01,182 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:01,244 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:01,294 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:01,332 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:01,360 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:01,386 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:01,409 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:01,431 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:01,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,486 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 11:17:01,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,537 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 11:17:01,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,598 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 11:17:01,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,670 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 11:17:01,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,762 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 11:17:01,876 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 11:17:01,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:01,892 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 11:17:02,036 WARN L181 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 11:17:02,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:02,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:02,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:02,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:02,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:02,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:02,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:02,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:02,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:02,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:02,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:02,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:02,056 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 11:17:02,057 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 11:17:02,114 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:02,399 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:02,456 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:02,514 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:02,572 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:02,631 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:17:02,728 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 11:17:02,729 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:150, output treesize:158 [2019-01-11 11:17:03,182 WARN L181 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-01-11 11:17:03,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,235 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 11:17:03,236 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-11 11:17:03,552 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 11:17:03,552 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:168, output treesize:258 [2019-01-11 11:17:03,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,667 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 11:17:03,668 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 11:17:03,669 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:17:03,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:03,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:17:04,051 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 11:17:04,052 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-11 11:17:04,119 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 128 xjuncts. [2019-01-11 11:17:06,386 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 11:17:06,387 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 17 variables, input treesize:280, output treesize:1007 [2019-01-11 11:17:12,896 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 11:17:12,898 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 11:17:12,902 INFO L168 Benchmark]: Toolchain (without parser) took 190259.89 ms. Allocated memory was 134.2 MB in the beginning and 312.0 MB in the end (delta: 177.7 MB). Free memory was 109.4 MB in the beginning and 107.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 179.9 MB. Max. memory is 7.1 GB. [2019-01-11 11:17:12,902 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 134.2 MB. Free memory is still 110.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-11 11:17:12,902 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.50 ms. Allocated memory is still 134.2 MB. Free memory was 109.2 MB in the beginning and 106.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-01-11 11:17:12,903 INFO L168 Benchmark]: Boogie Preprocessor took 43.03 ms. Allocated memory is still 134.2 MB. Free memory was 106.8 MB in the beginning and 105.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-11 11:17:12,903 INFO L168 Benchmark]: RCFGBuilder took 480.06 ms. Allocated memory is still 134.2 MB. Free memory was 105.5 MB in the beginning and 91.7 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2019-01-11 11:17:12,903 INFO L168 Benchmark]: TraceAbstraction took 189676.30 ms. Allocated memory was 134.2 MB in the beginning and 312.0 MB in the end (delta: 177.7 MB). Free memory was 91.5 MB in the beginning and 107.2 MB in the end (delta: -15.7 MB). Peak memory consumption was 162.1 MB. Max. memory is 7.1 GB. [2019-01-11 11:17:12,905 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 0.13 ms. Allocated memory is still 134.2 MB. Free memory is still 110.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 56.50 ms. Allocated memory is still 134.2 MB. Free memory was 109.2 MB in the beginning and 106.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.03 ms. Allocated memory is still 134.2 MB. Free memory was 106.8 MB in the beginning and 105.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 480.06 ms. Allocated memory is still 134.2 MB. Free memory was 105.5 MB in the beginning and 91.7 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 189676.30 ms. Allocated memory was 134.2 MB in the beginning and 312.0 MB in the end (delta: 177.7 MB). Free memory was 91.5 MB in the beginning and 107.2 MB in the end (delta: -15.7 MB). Peak memory consumption was 162.1 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...