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-6-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-a9d37a5-m [2019-02-28 10:22:51,145 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-02-28 10:22:51,147 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-02-28 10:22:51,159 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-02-28 10:22:51,192 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 [2019-02-28 10:22:51,205 INFO L110 SettingsManager]: Loading preferences was successful [2019-02-28 10:22:51,205 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-02-28 10:22:51,206 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-02-28 10:22:51,206 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-02-28 10:22:51,206 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-02-28 10:22:51,207 INFO L133 SettingsManager]: * User list type=DISABLED [2019-02-28 10:22:51,207 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-02-28 10:22:51,207 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-02-28 10:22:51,207 INFO L133 SettingsManager]: * Explicit value domain=true [2019-02-28 10:22:51,207 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-02-28 10:22:51,208 INFO L133 SettingsManager]: * Octagon Domain=false [2019-02-28 10:22:51,208 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-02-28 10:22:51,208 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-02-28 10:22:51,208 INFO L133 SettingsManager]: * Interval Domain=false [2019-02-28 10:22:51,209 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-02-28 10:22:51,209 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-02-28 10:22:51,209 INFO L133 SettingsManager]: * Use SBE=true [2019-02-28 10:22:51,209 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-02-28 10:22:51,210 INFO L133 SettingsManager]: * sizeof long=4 [2019-02-28 10:22:51,210 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-02-28 10:22:51,210 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-02-28 10:22:51,210 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-02-28 10:22:51,210 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-02-28 10:22:51,211 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-02-28 10:22:51,211 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-02-28 10:22:51,211 INFO L133 SettingsManager]: * sizeof long double=12 [2019-02-28 10:22:51,211 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-02-28 10:22:51,211 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-02-28 10:22:51,211 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-02-28 10:22:51,212 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-02-28 10:22:51,212 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-02-28 10:22:51,212 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in -t:200000 [2019-02-28 10:22:51,212 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-02-28 10:22:51,213 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-02-28 10:22:51,213 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-02-28 10:22:51,213 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-02-28 10:22:51,213 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-02-28 10:22:51,213 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in [2019-02-28 10:22:51,214 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-02-28 10:22:51,214 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-02-28 10:22:51,243 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-02-28 10:22:51,255 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-02-28 10:22:51,259 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-02-28 10:22:51,260 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-02-28 10:22:51,261 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-02-28 10:22:51,262 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-limited.bpl [2019-02-28 10:22:51,262 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-limited.bpl' [2019-02-28 10:22:51,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-02-28 10:22:51,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-02-28 10:22:51,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-02-28 10:22:51,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-02-28 10:22:51,323 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-02-28 10:22:51,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:22:51" (1/1) ... [2019-02-28 10:22:51,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:22:51" (1/1) ... [2019-02-28 10:22:51,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-02-28 10:22:51,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-02-28 10:22:51,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-02-28 10:22:51,381 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-02-28 10:22:51,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:22:51" (1/1) ... [2019-02-28 10:22:51,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:22:51" (1/1) ... [2019-02-28 10:22:51,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:22:51" (1/1) ... [2019-02-28 10:22:51,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:22:51" (1/1) ... [2019-02-28 10:22:51,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:22:51" (1/1) ... [2019-02-28 10:22:51,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:22:51" (1/1) ... [2019-02-28 10:22:51,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:22:51" (1/1) ... [2019-02-28 10:22:51,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-02-28 10:22:51,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-02-28 10:22:51,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-02-28 10:22:51,406 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-02-28 10:22:51,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:22:51" (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:16092 -smt2 -in -t:200000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in -t:200000 [2019-02-28 10:22:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-02-28 10:22:51,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-02-28 10:22:51,834 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-02-28 10:22:51,835 INFO L286 CfgBuilder]: Removed 15 assue(true) statements. [2019-02-28 10:22:51,836 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.02 10:22:51 BoogieIcfgContainer [2019-02-28 10:22:51,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-02-28 10:22:51,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-02-28 10:22:51,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-02-28 10:22:51,841 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-02-28 10:22:51,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:22:51" (1/2) ... [2019-02-28 10:22:51,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57369126 and model type speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.02 10:22:51, skipping insertion in model container [2019-02-28 10:22:51,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.02 10:22:51" (2/2) ... [2019-02-28 10:22:51,844 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-6-limited.bpl [2019-02-28 10:22:51,853 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-02-28 10:22:51,861 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-02-28 10:22:51,878 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-02-28 10:22:51,910 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-02-28 10:22:51,910 INFO L383 AbstractCegarLoop]: Hoare is true [2019-02-28 10:22:51,910 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-02-28 10:22:51,910 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-02-28 10:22:51,910 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-02-28 10:22:51,910 INFO L387 AbstractCegarLoop]: Difference is false [2019-02-28 10:22:51,911 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-02-28 10:22:51,911 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-02-28 10:22:51,926 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-02-28 10:22:51,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-02-28 10:22:51,932 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:22:51,933 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-02-28 10:22:51,940 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:22:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:22:51,948 INFO L82 PathProgramCache]: Analyzing trace with hash 988, now seen corresponding path program 1 times [2019-02-28 10:22:51,950 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:22:52,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:22:52,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:22:52,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:22:52,005 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:22:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:22:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:22:52,160 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-28 10:22:52,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-28 10:22:52,161 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-28 10:22:52,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-28 10:22:52,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-28 10:22:52,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-28 10:22:52,185 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-02-28 10:22:52,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:22:52,483 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2019-02-28 10:22:52,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-28 10:22:52,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-02-28 10:22:52,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:22:52,500 INFO L225 Difference]: With dead ends: 29 [2019-02-28 10:22:52,500 INFO L226 Difference]: Without dead ends: 24 [2019-02-28 10:22:52,503 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-28 10:22:52,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-02-28 10:22:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2019-02-28 10:22:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-02-28 10:22:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 25 transitions. [2019-02-28 10:22:52,537 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 25 transitions. Word has length 2 [2019-02-28 10:22:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:22:52,538 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 25 transitions. [2019-02-28 10:22:52,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-28 10:22:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 25 transitions. [2019-02-28 10:22:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-28 10:22:52,539 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:22:52,539 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-28 10:22:52,540 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:22:52,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:22:52,540 INFO L82 PathProgramCache]: Analyzing trace with hash 30376, now seen corresponding path program 1 times [2019-02-28 10:22:52,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:22:52,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:22:52,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:22:52,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:22:52,542 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:22:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:22:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:22:52,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:22:52,680 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:22:52,681 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-28 10:22:52,683 INFO L207 CegarAbsIntRunner]: [0], [18], [27] [2019-02-28 10:22:52,746 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:22:52,746 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:22:52,841 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:22:52,843 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 3. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-28 10:22:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:22:52,852 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:22:52,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:22:52,852 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 [2019-02-28 10:22:52,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:22:52,871 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:22:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:22:52,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 10 conjunts are in the unsatisfiable core [2019-02-28 10:22:52,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:22:53,008 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,034 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-02-28 10:22:53,035 INFO L315 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-28 10:22:53,052 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:53,190 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-28 10:22:53,211 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,212 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-28 10:22:53,219 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,222 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,224 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,226 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2019-02-28 10:22:53,237 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,251 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,253 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,259 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,286 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,304 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,306 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2019-02-28 10:22:53,321 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,323 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,325 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,327 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,329 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,331 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,334 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,339 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,341 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,345 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,347 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-02-28 10:22:53,354 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,357 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,359 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,360 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,362 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,364 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,365 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,375 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,377 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,378 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,382 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,383 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,387 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,413 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,435 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,438 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-02-28 10:22:53,441 INFO L315 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-28 10:22:53,607 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:53,667 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:53,785 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:53,797 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:53,863 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:53,897 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:22:53,897 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:45, output treesize:46 [2019-02-28 10:22:53,951 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,952 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,956 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,958 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,960 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,967 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,994 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:53,999 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:54,000 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:54,001 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:54,002 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:54,003 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:54,004 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:54,005 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:54,006 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:54,012 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-02-28 10:22:54,013 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:22:54,041 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:22:54,041 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:48 [2019-02-28 10:22:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:22:54,172 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:22:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:22:54,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:22:54,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-28 10:22:54,270 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:22:54,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-28 10:22:54,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-28 10:22:54,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-28 10:22:54,272 INFO L87 Difference]: Start difference. First operand 14 states and 25 transitions. Second operand 6 states. [2019-02-28 10:22:54,707 WARN L181 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2019-02-28 10:22:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:22:56,350 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2019-02-28 10:22:56,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-28 10:22:56,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-28 10:22:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:22:56,352 INFO L225 Difference]: With dead ends: 47 [2019-02-28 10:22:56,352 INFO L226 Difference]: Without dead ends: 45 [2019-02-28 10:22:56,354 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 [2019-02-28 10:22:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-02-28 10:22:56,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 18. [2019-02-28 10:22:56,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-02-28 10:22:56,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 37 transitions. [2019-02-28 10:22:56,360 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 37 transitions. Word has length 3 [2019-02-28 10:22:56,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:22:56,360 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 37 transitions. [2019-02-28 10:22:56,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-28 10:22:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 37 transitions. [2019-02-28 10:22:56,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-28 10:22:56,361 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:22:56,361 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-28 10:22:56,361 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:22:56,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:22:56,362 INFO L82 PathProgramCache]: Analyzing trace with hash 30004, now seen corresponding path program 1 times [2019-02-28 10:22:56,362 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:22:56,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:22:56,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:22:56,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:22:56,363 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:22:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:22:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:22:56,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:22:56,445 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:22:56,446 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-28 10:22:56,446 INFO L207 CegarAbsIntRunner]: [0], [6], [27] [2019-02-28 10:22:56,449 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:22:56,449 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:22:56,459 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:22:56,459 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 3. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-28 10:22:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:22:56,460 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:22:56,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:22:56,460 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 [2019-02-28 10:22:56,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:22:56,471 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:22:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:22:56,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 10 conjunts are in the unsatisfiable core [2019-02-28 10:22:56,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:22:56,492 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-28 10:22:56,503 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,504 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-28 10:22:56,514 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,517 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,519 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,520 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2019-02-28 10:22:56,533 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,536 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,538 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,540 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,542 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,544 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,545 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2019-02-28 10:22:56,559 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,561 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,572 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,574 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,576 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,578 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,580 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,582 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,584 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,586 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,588 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-02-28 10:22:56,599 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,601 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,605 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,607 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,609 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,611 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,613 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,615 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,617 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,619 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,621 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,624 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,627 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,629 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,631 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,632 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-02-28 10:22:56,633 INFO L315 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-28 10:22:56,651 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:56,669 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:56,689 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:56,705 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:56,725 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:56,774 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,777 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-02-28 10:22:56,777 INFO L315 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-28 10:22:56,781 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:56,834 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:22:56,834 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:45, output treesize:46 [2019-02-28 10:22:56,864 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,865 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,866 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,875 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,876 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,897 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,899 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,899 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,900 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,901 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,903 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,904 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,905 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,907 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,909 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:56,911 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-02-28 10:22:56,913 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:22:56,959 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:22:56,960 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:46 [2019-02-28 10:22:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:22:56,996 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:22:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:22:57,049 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-02-28 10:22:57,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-02-28 10:22:57,049 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-28 10:22:57,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-28 10:22:57,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-28 10:22:57,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-28 10:22:57,050 INFO L87 Difference]: Start difference. First operand 18 states and 37 transitions. Second operand 4 states. [2019-02-28 10:22:57,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:22:57,167 INFO L93 Difference]: Finished difference Result 23 states and 60 transitions. [2019-02-28 10:22:57,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-28 10:22:57,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-02-28 10:22:57,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:22:57,169 INFO L225 Difference]: With dead ends: 23 [2019-02-28 10:22:57,169 INFO L226 Difference]: Without dead ends: 22 [2019-02-28 10:22:57,170 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-28 10:22:57,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-02-28 10:22:57,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-02-28 10:22:57,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-02-28 10:22:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 59 transitions. [2019-02-28 10:22:57,177 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 59 transitions. Word has length 3 [2019-02-28 10:22:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:22:57,177 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 59 transitions. [2019-02-28 10:22:57,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-28 10:22:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 59 transitions. [2019-02-28 10:22:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-28 10:22:57,178 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:22:57,178 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-28 10:22:57,178 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:22:57,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:22:57,179 INFO L82 PathProgramCache]: Analyzing trace with hash 30562, now seen corresponding path program 1 times [2019-02-28 10:22:57,179 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:22:57,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:22:57,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:22:57,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:22:57,180 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:22:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:22:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:22:57,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:22:57,275 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:22:57,275 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-28 10:22:57,275 INFO L207 CegarAbsIntRunner]: [0], [24], [27] [2019-02-28 10:22:57,278 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:22:57,278 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:22:57,288 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:22:57,288 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 3. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-28 10:22:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:22:57,289 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:22:57,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:22:57,289 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 [2019-02-28 10:22:57,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:22:57,300 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:22:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:22:57,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 10 conjunts are in the unsatisfiable core [2019-02-28 10:22:57,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:22:57,332 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,344 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-02-28 10:22:57,346 INFO L315 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-28 10:22:57,347 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:57,374 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-28 10:22:57,387 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,388 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-28 10:22:57,392 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,394 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,396 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,397 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2019-02-28 10:22:57,439 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,440 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,442 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,443 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,443 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,444 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,446 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2019-02-28 10:22:57,466 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,467 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,469 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,470 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,471 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,473 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,474 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,476 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,477 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,478 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,482 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-02-28 10:22:57,488 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,490 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,492 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,494 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,496 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,497 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,498 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,499 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,501 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,502 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,503 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,505 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,506 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,508 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,509 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,511 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-02-28 10:22:57,512 INFO L315 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-28 10:22:57,526 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:57,541 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:57,556 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:57,578 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:57,592 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:57,620 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:22:57,621 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:45, output treesize:46 [2019-02-28 10:22:57,652 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,652 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,655 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,656 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,658 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,659 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,660 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,661 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,662 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,664 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,665 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,666 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,667 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,668 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,670 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:57,672 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-02-28 10:22:57,673 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:22:57,700 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:22:57,700 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:48 [2019-02-28 10:22:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:22:57,786 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:22:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:22:57,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:22:57,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-28 10:22:57,822 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:22:57,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-28 10:22:57,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-28 10:22:57,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-28 10:22:57,823 INFO L87 Difference]: Start difference. First operand 21 states and 59 transitions. Second operand 6 states. [2019-02-28 10:22:59,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:22:59,229 INFO L93 Difference]: Finished difference Result 50 states and 96 transitions. [2019-02-28 10:22:59,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-28 10:22:59,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-28 10:22:59,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:22:59,231 INFO L225 Difference]: With dead ends: 50 [2019-02-28 10:22:59,231 INFO L226 Difference]: Without dead ends: 47 [2019-02-28 10:22:59,232 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 [2019-02-28 10:22:59,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-02-28 10:22:59,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2019-02-28 10:22:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-02-28 10:22:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 74 transitions. [2019-02-28 10:22:59,239 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 74 transitions. Word has length 3 [2019-02-28 10:22:59,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:22:59,239 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 74 transitions. [2019-02-28 10:22:59,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-28 10:22:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 74 transitions. [2019-02-28 10:22:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-28 10:22:59,240 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:22:59,240 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-28 10:22:59,240 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:22:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:22:59,240 INFO L82 PathProgramCache]: Analyzing trace with hash 30128, now seen corresponding path program 1 times [2019-02-28 10:22:59,240 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:22:59,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:22:59,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:22:59,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:22:59,241 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:22:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:22:59,391 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2019-02-28 10:22:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:22:59,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:22:59,396 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:22:59,397 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-28 10:22:59,397 INFO L207 CegarAbsIntRunner]: [0], [10], [27] [2019-02-28 10:22:59,399 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:22:59,399 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:22:59,406 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:22:59,406 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 3. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-28 10:22:59,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:22:59,407 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:22:59,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:22:59,407 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 [2019-02-28 10:22:59,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:22:59,421 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:22:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:22:59,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 10 conjunts are in the unsatisfiable core [2019-02-28 10:22:59,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:22:59,442 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-28 10:22:59,445 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,446 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-28 10:22:59,451 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,453 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,455 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,456 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2019-02-28 10:22:59,461 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,463 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,465 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,467 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,469 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,471 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,472 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2019-02-28 10:22:59,475 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,476 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,502 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,525 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,542 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,544 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,546 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,548 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,550 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,553 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,554 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-02-28 10:22:59,595 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,616 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,619 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,621 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,622 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,622 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,623 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,624 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,625 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,627 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,628 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,629 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,630 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,632 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,633 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,637 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-02-28 10:22:59,638 INFO L315 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-28 10:22:59,667 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:59,681 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:59,695 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:59,709 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:59,723 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:59,751 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,756 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-02-28 10:22:59,756 INFO L315 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-28 10:22:59,758 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:22:59,781 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:22:59,782 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:45, output treesize:46 [2019-02-28 10:22:59,820 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,822 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,824 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,825 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,826 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,827 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,828 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,829 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,830 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,832 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,833 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,838 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,838 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,839 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,840 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:22:59,841 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-02-28 10:22:59,842 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:22:59,868 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:22:59,869 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:48 [2019-02-28 10:22:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:22:59,952 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:22:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:22:59,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:22:59,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-28 10:22:59,988 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:22:59,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-28 10:22:59,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-28 10:22:59,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-28 10:22:59,989 INFO L87 Difference]: Start difference. First operand 24 states and 74 transitions. Second operand 6 states. [2019-02-28 10:23:01,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:23:01,121 INFO L93 Difference]: Finished difference Result 50 states and 108 transitions. [2019-02-28 10:23:01,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-28 10:23:01,121 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-28 10:23:01,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:23:01,124 INFO L225 Difference]: With dead ends: 50 [2019-02-28 10:23:01,124 INFO L226 Difference]: Without dead ends: 48 [2019-02-28 10:23:01,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-28 10:23:01,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-02-28 10:23:01,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 26. [2019-02-28 10:23:01,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-02-28 10:23:01,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 87 transitions. [2019-02-28 10:23:01,133 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 87 transitions. Word has length 3 [2019-02-28 10:23:01,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:23:01,134 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 87 transitions. [2019-02-28 10:23:01,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-28 10:23:01,134 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 87 transitions. [2019-02-28 10:23:01,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-28 10:23:01,134 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:23:01,135 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-28 10:23:01,135 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:23:01,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:01,135 INFO L82 PathProgramCache]: Analyzing trace with hash 941528, now seen corresponding path program 1 times [2019-02-28 10:23:01,135 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:23:01,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:01,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:01,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:01,136 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:23:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:01,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:01,294 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:23:01,295 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-28 10:23:01,295 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [27] [2019-02-28 10:23:01,297 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:23:01,298 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:23:01,304 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:23:01,304 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-28 10:23:01,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:01,305 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:23:01,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:01,305 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 [2019-02-28 10:23:01,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:01,317 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:23:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:01,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2019-02-28 10:23:01,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:23:01,330 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-28 10:23:01,345 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,346 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-28 10:23:01,349 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,351 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,353 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,356 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2019-02-28 10:23:01,368 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,371 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,374 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,377 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,380 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,383 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,384 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2019-02-28 10:23:01,388 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,389 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,390 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,391 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,393 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,394 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,395 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,397 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,398 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,399 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,401 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-02-28 10:23:01,418 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,421 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,424 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,427 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,430 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,432 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,433 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,434 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,435 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,436 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,437 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,440 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,441 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,443 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,444 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,446 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-02-28 10:23:01,447 INFO L315 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:01,463 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:01,634 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:01,720 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:01,757 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:01,777 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:01,816 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,819 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-02-28 10:23:01,820 INFO L315 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:01,822 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:01,847 INFO L315 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:01,847 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:45, output treesize:46 [2019-02-28 10:23:01,923 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,924 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,925 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,927 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,928 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,929 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,930 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,930 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,931 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,933 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,934 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,935 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,936 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,937 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,939 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:01,940 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-02-28 10:23:01,941 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:01,965 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:01,965 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:48 [2019-02-28 10:23:02,006 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:02,007 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:02,008 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:02,009 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:02,009 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:02,011 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:02,012 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:02,013 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:02,014 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:02,016 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:02,017 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:02,018 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:02,033 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:02,034 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:02,035 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:02,036 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2019-02-28 10:23:02,037 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:02,063 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:02,063 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:48 [2019-02-28 10:23:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:02,213 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:23:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:02,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:23:02,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-28 10:23:02,269 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:23:02,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-28 10:23:02,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-28 10:23:02,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-28 10:23:02,270 INFO L87 Difference]: Start difference. First operand 26 states and 87 transitions. Second operand 8 states. [2019-02-28 10:23:05,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:23:05,212 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2019-02-28 10:23:05,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-28 10:23:05,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-28 10:23:05,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:23:05,214 INFO L225 Difference]: With dead ends: 62 [2019-02-28 10:23:05,214 INFO L226 Difference]: Without dead ends: 58 [2019-02-28 10:23:05,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-28 10:23:05,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-02-28 10:23:05,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 30. [2019-02-28 10:23:05,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-02-28 10:23:05,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 105 transitions. [2019-02-28 10:23:05,223 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 105 transitions. Word has length 4 [2019-02-28 10:23:05,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:23:05,224 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 105 transitions. [2019-02-28 10:23:05,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-28 10:23:05,224 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 105 transitions. [2019-02-28 10:23:05,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-28 10:23:05,224 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:23:05,224 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-28 10:23:05,225 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:23:05,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:05,225 INFO L82 PathProgramCache]: Analyzing trace with hash 941590, now seen corresponding path program 1 times [2019-02-28 10:23:05,225 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:23:05,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:05,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:05,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:05,226 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:23:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:05,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:05,323 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:23:05,323 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-28 10:23:05,324 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [27] [2019-02-28 10:23:05,325 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:23:05,325 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:23:05,331 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:23:05,331 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-28 10:23:05,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:05,331 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:23:05,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:05,332 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 [2019-02-28 10:23:05,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:05,341 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:23:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:05,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2019-02-28 10:23:05,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:23:05,370 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,373 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-02-28 10:23:05,373 INFO L315 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:05,377 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:05,394 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-28 10:23:05,401 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,402 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-28 10:23:05,405 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,408 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,411 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,412 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2019-02-28 10:23:05,439 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,440 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,441 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,442 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,443 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,443 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,444 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2019-02-28 10:23:05,454 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,456 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,459 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,461 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,461 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,462 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,463 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,464 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,464 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,465 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,467 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-02-28 10:23:05,490 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,491 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,492 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,492 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,493 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,494 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,495 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,497 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,498 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,499 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,500 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,501 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,503 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,504 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,505 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,507 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-02-28 10:23:05,507 INFO L315 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:05,538 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:05,549 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:05,562 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:05,573 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:05,584 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:05,642 INFO L315 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:05,642 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:45, output treesize:46 [2019-02-28 10:23:05,700 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,701 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,702 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,702 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,704 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,705 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,706 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,707 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,708 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,710 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,711 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,712 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,713 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,714 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,715 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,717 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-02-28 10:23:05,718 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:05,741 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:05,741 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:48 [2019-02-28 10:23:05,779 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,780 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,781 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,782 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,782 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,783 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,784 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,785 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,787 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,788 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,789 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,790 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,791 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,792 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,794 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:05,795 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2019-02-28 10:23:05,796 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:05,823 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:05,824 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:50 [2019-02-28 10:23:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:05,976 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:23:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:06,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:23:06,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-28 10:23:06,027 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:23:06,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-28 10:23:06,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-28 10:23:06,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-28 10:23:06,028 INFO L87 Difference]: Start difference. First operand 30 states and 105 transitions. Second operand 8 states. [2019-02-28 10:23:08,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:23:08,929 INFO L93 Difference]: Finished difference Result 60 states and 147 transitions. [2019-02-28 10:23:08,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-28 10:23:08,930 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-28 10:23:08,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:23:08,931 INFO L225 Difference]: With dead ends: 60 [2019-02-28 10:23:08,931 INFO L226 Difference]: Without dead ends: 56 [2019-02-28 10:23:08,932 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-02-28 10:23:08,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-02-28 10:23:08,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2019-02-28 10:23:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-02-28 10:23:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 110 transitions. [2019-02-28 10:23:08,941 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 110 transitions. Word has length 4 [2019-02-28 10:23:08,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:23:08,941 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 110 transitions. [2019-02-28 10:23:08,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-28 10:23:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 110 transitions. [2019-02-28 10:23:08,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-28 10:23:08,942 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:23:08,942 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-28 10:23:08,942 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:23:08,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:08,943 INFO L82 PathProgramCache]: Analyzing trace with hash 941156, now seen corresponding path program 1 times [2019-02-28 10:23:08,943 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:23:08,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:08,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:08,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:08,944 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:23:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:09,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:09,108 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:23:09,109 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-28 10:23:09,109 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [27] [2019-02-28 10:23:09,110 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:23:09,110 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:23:09,116 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:23:09,116 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-28 10:23:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:09,117 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:23:09,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:09,117 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 [2019-02-28 10:23:09,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:09,127 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:23:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:09,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2019-02-28 10:23:09,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:23:09,141 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-28 10:23:09,147 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,148 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-28 10:23:09,151 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,154 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,156 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,157 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2019-02-28 10:23:09,159 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,160 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,161 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,161 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,162 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,164 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,165 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2019-02-28 10:23:09,170 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,172 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,174 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,176 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,177 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,178 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,180 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,182 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,183 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,184 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,187 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-02-28 10:23:09,201 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,203 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,204 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,204 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,205 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,206 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,207 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,209 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,210 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,211 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,212 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,214 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,215 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,216 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,217 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,219 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-02-28 10:23:09,219 INFO L315 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:09,235 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:09,250 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:09,264 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:09,277 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:09,291 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:09,322 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,325 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-02-28 10:23:09,326 INFO L315 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:09,328 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:09,353 INFO L315 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:09,354 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:45, output treesize:46 [2019-02-28 10:23:09,378 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,379 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,379 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,380 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,381 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,382 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,383 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,384 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,385 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,386 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,388 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,389 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,390 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,391 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,392 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,394 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-02-28 10:23:09,395 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:09,419 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:09,420 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:48 [2019-02-28 10:23:09,458 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,458 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,459 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,460 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,461 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,462 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,463 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,465 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,466 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,467 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,468 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,469 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,471 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,472 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,473 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:09,475 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2019-02-28 10:23:09,475 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:09,500 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:09,500 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:50 [2019-02-28 10:23:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:09,652 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:23:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:09,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:23:09,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-28 10:23:09,695 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:23:09,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-28 10:23:09,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-28 10:23:09,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-28 10:23:09,696 INFO L87 Difference]: Start difference. First operand 30 states and 110 transitions. Second operand 8 states. [2019-02-28 10:23:11,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:23:11,267 INFO L93 Difference]: Finished difference Result 57 states and 144 transitions. [2019-02-28 10:23:11,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-28 10:23:11,267 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-28 10:23:11,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:23:11,269 INFO L225 Difference]: With dead ends: 57 [2019-02-28 10:23:11,269 INFO L226 Difference]: Without dead ends: 55 [2019-02-28 10:23:11,270 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-02-28 10:23:11,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-02-28 10:23:11,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2019-02-28 10:23:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-02-28 10:23:11,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 109 transitions. [2019-02-28 10:23:11,279 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 109 transitions. Word has length 4 [2019-02-28 10:23:11,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:23:11,279 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 109 transitions. [2019-02-28 10:23:11,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-28 10:23:11,280 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 109 transitions. [2019-02-28 10:23:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-28 10:23:11,280 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:23:11,280 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-28 10:23:11,281 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:23:11,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:11,281 INFO L82 PathProgramCache]: Analyzing trace with hash 941280, now seen corresponding path program 1 times [2019-02-28 10:23:11,281 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:23:11,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:11,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:11,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:11,282 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:23:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:11,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:11,381 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:23:11,381 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-28 10:23:11,381 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [27] [2019-02-28 10:23:11,382 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:23:11,383 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:23:11,389 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:23:11,390 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-28 10:23:11,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:11,390 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:23:11,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:11,391 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:23:11,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:11,408 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:23:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:11,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2019-02-28 10:23:11,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:23:11,468 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,483 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-02-28 10:23:11,484 INFO L315 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:11,493 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:11,509 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-28 10:23:11,512 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,513 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-28 10:23:11,517 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,518 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,519 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,521 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2019-02-28 10:23:11,525 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,526 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,527 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,528 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,529 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,530 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,531 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2019-02-28 10:23:11,543 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,547 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,549 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,551 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,552 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,552 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,553 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,554 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,555 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,556 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,558 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-02-28 10:23:11,563 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,564 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,571 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,572 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,573 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,574 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,575 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,576 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,577 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,579 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,580 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,581 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,583 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,584 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,585 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,587 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-02-28 10:23:11,587 INFO L315 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:11,600 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:11,614 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:11,628 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:11,642 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:11,656 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:11,682 INFO L315 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:11,683 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:45, output treesize:46 [2019-02-28 10:23:11,709 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,710 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,711 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,712 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,714 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,723 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,725 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,725 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,726 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,727 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,728 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,729 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,731 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,732 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,733 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,734 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-02-28 10:23:11,735 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:11,759 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:11,759 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:48 [2019-02-28 10:23:11,798 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,800 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,802 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,804 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,806 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,808 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,810 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,812 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,814 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,817 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,819 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,822 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,824 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,826 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,828 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,829 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2019-02-28 10:23:11,830 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:11,863 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:11,863 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:48 [2019-02-28 10:23:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:12,012 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:23:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:12,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:23:12,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-28 10:23:12,068 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:23:12,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-28 10:23:12,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-28 10:23:12,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-28 10:23:12,072 INFO L87 Difference]: Start difference. First operand 30 states and 109 transitions. Second operand 8 states. [2019-02-28 10:23:13,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:23:13,979 INFO L93 Difference]: Finished difference Result 57 states and 158 transitions. [2019-02-28 10:23:13,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-28 10:23:13,980 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-28 10:23:13,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:23:13,981 INFO L225 Difference]: With dead ends: 57 [2019-02-28 10:23:13,981 INFO L226 Difference]: Without dead ends: 53 [2019-02-28 10:23:13,982 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-28 10:23:13,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-02-28 10:23:13,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2019-02-28 10:23:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-02-28 10:23:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 126 transitions. [2019-02-28 10:23:13,991 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 126 transitions. Word has length 4 [2019-02-28 10:23:13,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:23:13,991 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 126 transitions. [2019-02-28 10:23:13,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-28 10:23:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 126 transitions. [2019-02-28 10:23:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-28 10:23:13,992 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:23:13,992 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-28 10:23:13,993 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:23:13,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:13,993 INFO L82 PathProgramCache]: Analyzing trace with hash 929872, now seen corresponding path program 1 times [2019-02-28 10:23:13,993 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:23:13,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:13,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:13,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:13,994 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:23:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:14,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:14,097 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:23:14,097 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-28 10:23:14,097 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [27] [2019-02-28 10:23:14,098 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:23:14,098 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:23:14,103 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:23:14,103 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-28 10:23:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:14,104 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:23:14,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:14,104 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:23:14,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:14,116 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:23:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:14,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2019-02-28 10:23:14,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:23:14,136 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,143 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-02-28 10:23:14,143 INFO L315 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:14,144 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:14,161 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-28 10:23:14,177 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,178 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-28 10:23:14,181 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,183 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,185 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,186 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2019-02-28 10:23:14,191 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,193 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,195 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,197 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,199 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,199 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,200 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2019-02-28 10:23:14,203 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,204 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,206 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,208 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,210 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,212 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,214 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,216 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,218 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,219 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,219 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-02-28 10:23:14,227 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,228 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,228 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,229 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,230 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,231 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,233 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,234 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,235 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,236 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,238 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,239 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,240 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,241 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,242 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,243 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-02-28 10:23:14,244 INFO L315 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:14,256 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:14,268 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:14,279 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:14,291 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:14,303 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:14,325 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:14,325 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:45, output treesize:46 [2019-02-28 10:23:14,347 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,348 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,349 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,349 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,350 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,351 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,352 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,353 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,354 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,355 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,357 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,358 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,359 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,360 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,361 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,362 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-02-28 10:23:14,363 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:14,386 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:14,386 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:46 [2019-02-28 10:23:14,407 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,408 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,409 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,410 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,411 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,412 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,413 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,414 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,415 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,417 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,418 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,419 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,420 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,421 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,422 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:14,424 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-02-28 10:23:14,424 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:14,447 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:14,447 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:48 [2019-02-28 10:23:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:14,530 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:23:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:14,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:23:14,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-28 10:23:14,572 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:23:14,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-28 10:23:14,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-28 10:23:14,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-02-28 10:23:14,573 INFO L87 Difference]: Start difference. First operand 31 states and 126 transitions. Second operand 8 states. [2019-02-28 10:23:16,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:23:16,100 INFO L93 Difference]: Finished difference Result 77 states and 200 transitions. [2019-02-28 10:23:16,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-28 10:23:16,100 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-28 10:23:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:23:16,102 INFO L225 Difference]: With dead ends: 77 [2019-02-28 10:23:16,102 INFO L226 Difference]: Without dead ends: 75 [2019-02-28 10:23:16,103 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-02-28 10:23:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-02-28 10:23:16,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 38. [2019-02-28 10:23:16,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-02-28 10:23:16,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 159 transitions. [2019-02-28 10:23:16,113 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 159 transitions. Word has length 4 [2019-02-28 10:23:16,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:23:16,114 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 159 transitions. [2019-02-28 10:23:16,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-28 10:23:16,114 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 159 transitions. [2019-02-28 10:23:16,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-28 10:23:16,115 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:23:16,115 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-28 10:23:16,115 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:23:16,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:16,115 INFO L82 PathProgramCache]: Analyzing trace with hash 930058, now seen corresponding path program 1 times [2019-02-28 10:23:16,116 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:23:16,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:16,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:16,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:16,117 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:23:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:16,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:16,265 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:23:16,265 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-28 10:23:16,266 INFO L207 CegarAbsIntRunner]: [0], [6], [24], [27] [2019-02-28 10:23:16,266 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:23:16,267 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:23:16,272 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:23:16,272 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-28 10:23:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:16,272 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:23:16,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:16,273 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:23:16,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:16,290 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:23:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:16,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2019-02-28 10:23:16,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:23:16,313 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-28 10:23:16,321 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,322 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-28 10:23:16,329 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,331 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,333 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,333 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2019-02-28 10:23:16,375 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,392 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,393 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,395 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,396 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,397 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,398 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2019-02-28 10:23:16,404 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,407 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,410 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,412 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,414 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,416 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,418 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,419 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,419 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,421 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,422 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-02-28 10:23:16,430 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,431 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,432 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,433 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,433 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,434 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,435 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,437 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,438 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,439 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,440 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,441 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,443 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,444 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,445 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,446 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-02-28 10:23:16,446 INFO L315 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:16,460 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:16,474 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:16,487 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:16,500 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:16,518 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:16,546 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,551 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-02-28 10:23:16,551 INFO L315 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:16,553 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:16,573 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:16,573 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:45, output treesize:46 [2019-02-28 10:23:16,634 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,635 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,636 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,636 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,637 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,638 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,639 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,640 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,641 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,642 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,644 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,645 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,646 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,647 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,648 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,650 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-02-28 10:23:16,650 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:16,675 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:16,676 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:46 [2019-02-28 10:23:16,695 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,695 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,696 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,697 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,698 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,699 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,700 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,701 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,702 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,703 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,705 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,706 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,707 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,708 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,709 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:16,711 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2019-02-28 10:23:16,711 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:16,734 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:16,735 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:56, output treesize:48 [2019-02-28 10:23:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:16,815 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:23:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:16,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:23:16,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-28 10:23:16,850 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:23:16,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-28 10:23:16,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-28 10:23:16,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-02-28 10:23:16,850 INFO L87 Difference]: Start difference. First operand 38 states and 159 transitions. Second operand 8 states. [2019-02-28 10:23:18,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:23:18,639 INFO L93 Difference]: Finished difference Result 82 states and 241 transitions. [2019-02-28 10:23:18,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-28 10:23:18,640 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-28 10:23:18,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:23:18,642 INFO L225 Difference]: With dead ends: 82 [2019-02-28 10:23:18,642 INFO L226 Difference]: Without dead ends: 79 [2019-02-28 10:23:18,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-02-28 10:23:18,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-02-28 10:23:18,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 46. [2019-02-28 10:23:18,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-02-28 10:23:18,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 209 transitions. [2019-02-28 10:23:18,653 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 209 transitions. Word has length 4 [2019-02-28 10:23:18,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:23:18,653 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 209 transitions. [2019-02-28 10:23:18,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-28 10:23:18,653 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 209 transitions. [2019-02-28 10:23:18,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-28 10:23:18,654 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:23:18,654 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-28 10:23:18,655 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:23:18,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:18,655 INFO L82 PathProgramCache]: Analyzing trace with hash 930184, now seen corresponding path program 1 times [2019-02-28 10:23:18,655 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:23:18,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:18,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:18,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:18,656 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:23:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:18,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:18,718 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:23:18,718 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-28 10:23:18,718 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [29] [2019-02-28 10:23:18,720 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:23:18,720 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:23:18,728 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:23:18,729 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-28 10:23:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:18,729 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:23:18,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:18,729 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:23:18,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:18,737 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:23:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:18,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 9 conjunts are in the unsatisfiable core [2019-02-28 10:23:18,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:23:18,755 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-02-28 10:23:18,755 INFO L315 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:18,757 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:18,776 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-02-28 10:23:18,780 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-02-28 10:23:18,784 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,799 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 31 [2019-02-28 10:23:18,802 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,804 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,806 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,815 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 33 [2019-02-28 10:23:18,819 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,820 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,821 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,822 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,824 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,827 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,840 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 35 [2019-02-28 10:23:18,846 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,848 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,850 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,852 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,854 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,855 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,856 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,857 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,859 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,861 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,873 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 34 [2019-02-28 10:23:18,874 INFO L315 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:18,886 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:18,897 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:18,912 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:18,923 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:18,935 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:18,959 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:18,960 INFO L209 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:42, output treesize:47 [2019-02-28 10:23:18,992 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,993 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,993 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,994 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,995 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,996 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:18,998 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:19,000 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:19,001 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:19,003 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:19,041 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 41 treesize of output 64 [2019-02-28 10:23:19,046 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-02-28 10:23:19,189 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 21 dim-0 vars, and 5 xjuncts. [2019-02-28 10:23:19,190 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:57, output treesize:196 [2019-02-28 10:26:24,352 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:26:24,354 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:16092 -smt2 -in -t:200000)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.parseSuccess(Executor.java:221) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.push(DiffWrapperScript.java:93) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.push(WrapperScript.java:101) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.UndoableWrapperScript.push(UndoableWrapperScript.java:52) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:152) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:581) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:215) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 46 more [2019-02-28 10:26:24,359 INFO L168 Benchmark]: Toolchain (without parser) took 213039.40 ms. Allocated memory was 133.7 MB in the beginning and 346.6 MB in the end (delta: 212.9 MB). Free memory was 109.1 MB in the beginning and 157.1 MB in the end (delta: -48.0 MB). Peak memory consumption was 164.9 MB. Max. memory is 7.1 GB. [2019-02-28 10:26:24,360 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 133.7 MB. Free memory is still 110.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-02-28 10:26:24,361 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.72 ms. Allocated memory is still 133.7 MB. Free memory was 108.8 MB in the beginning and 106.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-02-28 10:26:24,361 INFO L168 Benchmark]: Boogie Preprocessor took 25.17 ms. Allocated memory is still 133.7 MB. Free memory was 106.5 MB in the beginning and 105.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-02-28 10:26:24,362 INFO L168 Benchmark]: RCFGBuilder took 430.35 ms. Allocated memory is still 133.7 MB. Free memory was 105.3 MB in the beginning and 93.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-02-28 10:26:24,362 INFO L168 Benchmark]: TraceAbstraction took 212521.02 ms. Allocated memory was 133.7 MB in the beginning and 346.6 MB in the end (delta: 212.9 MB). Free memory was 93.3 MB in the beginning and 157.1 MB in the end (delta: -63.8 MB). Peak memory consumption was 149.1 MB. Max. memory is 7.1 GB. [2019-02-28 10:26:24,365 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 133.7 MB. Free memory is still 110.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 57.72 ms. Allocated memory is still 133.7 MB. Free memory was 108.8 MB in the beginning and 106.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.17 ms. Allocated memory is still 133.7 MB. Free memory was 106.5 MB in the beginning and 105.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 430.35 ms. Allocated memory is still 133.7 MB. Free memory was 105.3 MB in the beginning and 93.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 212521.02 ms. Allocated memory was 133.7 MB in the beginning and 346.6 MB in the end (delta: 212.9 MB). Free memory was 93.3 MB in the beginning and 157.1 MB in the end (delta: -63.8 MB). Peak memory consumption was 149.1 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:16092 -smt2 -in -t:200000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in -t:200000)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...