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-8-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-1de736e-m [2019-02-18 09:39:01,305 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-02-18 09:39:01,307 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-02-18 09:39:01,328 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-02-18 09:39:01,373 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 [2019-02-18 09:39:01,386 INFO L110 SettingsManager]: Loading preferences was successful [2019-02-18 09:39:01,387 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-02-18 09:39:01,387 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-02-18 09:39:01,388 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-02-18 09:39:01,388 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-02-18 09:39:01,388 INFO L133 SettingsManager]: * User list type=DISABLED [2019-02-18 09:39:01,388 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-02-18 09:39:01,388 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-02-18 09:39:01,389 INFO L133 SettingsManager]: * Explicit value domain=true [2019-02-18 09:39:01,389 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-02-18 09:39:01,389 INFO L133 SettingsManager]: * Octagon Domain=false [2019-02-18 09:39:01,389 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-02-18 09:39:01,389 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-02-18 09:39:01,390 INFO L133 SettingsManager]: * Interval Domain=false [2019-02-18 09:39:01,391 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-02-18 09:39:01,391 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-02-18 09:39:01,391 INFO L133 SettingsManager]: * Use SBE=true [2019-02-18 09:39:01,393 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-02-18 09:39:01,393 INFO L133 SettingsManager]: * sizeof long=4 [2019-02-18 09:39:01,394 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-02-18 09:39:01,394 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-02-18 09:39:01,394 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-02-18 09:39:01,394 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-02-18 09:39:01,394 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-02-18 09:39:01,394 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-02-18 09:39:01,395 INFO L133 SettingsManager]: * sizeof long double=12 [2019-02-18 09:39:01,395 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-02-18 09:39:01,395 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-02-18 09:39:01,396 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-02-18 09:39:01,396 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-02-18 09:39:01,396 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-02-18 09:39:01,396 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-02-18 09:39:01,396 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-02-18 09:39:01,397 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-02-18 09:39:01,397 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-02-18 09:39:01,397 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-02-18 09:39:01,397 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-02-18 09:39:01,397 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in [2019-02-18 09:39:01,398 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-02-18 09:39:01,398 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-02-18 09:39:01,439 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-02-18 09:39:01,452 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-02-18 09:39:01,456 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-02-18 09:39:01,457 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-02-18 09:39:01,458 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-02-18 09:39:01,459 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl [2019-02-18 09:39:01,459 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl' [2019-02-18 09:39:01,518 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-02-18 09:39:01,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-02-18 09:39:01,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-02-18 09:39:01,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-02-18 09:39:01,521 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-02-18 09:39:01,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-02-18 09:39:01,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-02-18 09:39:01,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-02-18 09:39:01,595 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-02-18 09:39:01,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... [2019-02-18 09:39:01,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-02-18 09:39:01,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-02-18 09:39:01,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-02-18 09:39:01,632 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-02-18 09:39:01,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-02-18 09:39:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-02-18 09:39:01,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-02-18 09:39:02,069 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-02-18 09:39:02,069 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-02-18 09:39:02,071 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:39:02 BoogieIcfgContainer [2019-02-18 09:39:02,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-02-18 09:39:02,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-02-18 09:39:02,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-02-18 09:39:02,075 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-02-18 09:39:02,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 09:39:01" (1/2) ... [2019-02-18 09:39:02,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20bcef8 and model type speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 09:39:02, skipping insertion in model container [2019-02-18 09:39:02,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:39:02" (2/2) ... [2019-02-18 09:39:02,078 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-unlimited.bpl [2019-02-18 09:39:02,089 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-02-18 09:39:02,097 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-02-18 09:39:02,117 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-02-18 09:39:02,154 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-02-18 09:39:02,154 INFO L383 AbstractCegarLoop]: Hoare is true [2019-02-18 09:39:02,154 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-02-18 09:39:02,155 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-02-18 09:39:02,155 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-02-18 09:39:02,155 INFO L387 AbstractCegarLoop]: Difference is false [2019-02-18 09:39:02,155 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-02-18 09:39:02,156 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-02-18 09:39:02,175 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-02-18 09:39:02,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-02-18 09:39:02,190 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:39:02,191 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-02-18 09:39:02,194 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:39:02,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:02,202 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-02-18 09:39:02,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:39:02,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:02,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:02,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:02,256 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:39:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:02,444 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-18 09:39:02,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-18 09:39:02,445 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 09:39:02,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-18 09:39:02,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-18 09:39:02,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-18 09:39:02,468 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-02-18 09:39:02,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:39:02,666 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-02-18 09:39:02,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-18 09:39:02,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-02-18 09:39:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:39:02,687 INFO L225 Difference]: With dead ends: 37 [2019-02-18 09:39:02,687 INFO L226 Difference]: Without dead ends: 32 [2019-02-18 09:39:02,690 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 [2019-02-18 09:39:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-02-18 09:39:02,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-02-18 09:39:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-02-18 09:39:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-02-18 09:39:02,722 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-02-18 09:39:02,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:39:02,724 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-02-18 09:39:02,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-18 09:39:02,724 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-02-18 09:39:02,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:39:02,725 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:39:02,725 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:39:02,741 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:39:02,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:02,742 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-02-18 09:39:02,742 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:39:02,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:02,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:02,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:02,744 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:39:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:02,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:02,943 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:39:02,944 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 09:39:02,946 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-02-18 09:39:02,984 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:39:02,985 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:39:03,074 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:39:03,076 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:39:03,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:03,084 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:39:03,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:03,085 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 [2019-02-18 09:39:03,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:03,102 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:39:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:03,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:39:03,366 WARN L181 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-02-18 09:39:03,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:39:03,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:39:03,446 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,467 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:39:03,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,498 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,519 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,521 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:39:03,545 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,547 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,551 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,553 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,555 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:39:03,601 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,656 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,677 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,703 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,704 INFO L303 Elim1Store]: Index analysis took 136 ms [2019-02-18 09:39:03,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:39:03,761 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,778 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,805 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,829 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,853 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,878 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,879 INFO L303 Elim1Store]: Index analysis took 162 ms [2019-02-18 09:39:03,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:39:03,906 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,911 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,913 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,915 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,917 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,919 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,921 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:03,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-18 09:39:03,926 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,224 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,623 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,674 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,719 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,770 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,798 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,830 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:04,908 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-18 09:39:04,996 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,998 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:04,999 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 09:39:05,091 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,093 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,097 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-18 09:39:05,248 WARN L181 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-02-18 09:39:05,255 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,256 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,258 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,259 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,284 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,297 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-18 09:39:05,425 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-02-18 09:39:05,464 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,488 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,510 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,534 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,536 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,538 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,623 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,628 INFO L303 Elim1Store]: Index analysis took 199 ms [2019-02-18 09:39:05,629 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-18 09:39:05,766 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-02-18 09:39:05,806 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,810 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,811 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,813 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,814 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,814 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,815 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,816 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,817 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,818 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:05,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-18 09:39:06,056 WARN L181 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 09:39:06,079 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:06,080 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:06,081 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:06,082 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:06,083 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:06,083 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:06,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:06,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:06,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:06,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:06,089 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:06,091 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:06,094 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-18 09:39:06,095 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:06,180 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:06,305 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:06,362 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:06,428 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:06,509 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:06,582 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:06,703 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:06,703 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:147, output treesize:153 [2019-02-18 09:39:06,802 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:06,804 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-18 09:39:06,805 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:06,985 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:06,986 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-02-18 09:39:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:07,016 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:39:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:07,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:39:07,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 09:39:07,156 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:39:07,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 09:39:07,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 09:39:07,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 09:39:07,157 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2019-02-18 09:39:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:39:18,428 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2019-02-18 09:39:18,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 09:39:18,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 09:39:18,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:39:18,431 INFO L225 Difference]: With dead ends: 63 [2019-02-18 09:39:18,431 INFO L226 Difference]: Without dead ends: 60 [2019-02-18 09:39:18,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-18 09:39:18,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-02-18 09:39:18,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-02-18 09:39:18,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-02-18 09:39:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2019-02-18 09:39:18,441 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2019-02-18 09:39:18,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:39:18,441 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2019-02-18 09:39:18,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 09:39:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2019-02-18 09:39:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:39:18,442 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:39:18,442 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:39:18,442 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:39:18,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:18,443 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2019-02-18 09:39:18,443 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:39:18,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:18,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:18,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:18,444 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:39:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:18,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:18,665 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:39:18,665 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 09:39:18,666 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2019-02-18 09:39:18,667 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:39:18,667 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:39:18,675 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:39:18,676 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:39:18,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:18,676 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:39:18,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:18,676 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 [2019-02-18 09:39:18,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:18,693 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:39:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:18,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:39:18,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:39:18,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:39:18,801 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,809 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,810 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:39:18,815 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,821 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,822 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,823 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:39:18,862 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,866 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,868 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:39:18,883 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,885 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,895 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,897 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,899 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:39:18,919 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,921 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,923 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,925 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,927 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,928 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:18,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:39:18,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:39:18,960 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:19,027 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:19,072 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:19,110 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:19,141 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:19,166 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:19,190 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:19,217 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:19,261 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:39:19,344 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,366 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:39:19,451 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,452 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,452 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,453 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:39:19,541 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,543 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,543 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,544 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,545 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,547 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:39:19,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,644 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,647 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,649 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,650 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,651 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:39:19,859 WARN L181 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-02-18 09:39:19,864 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,865 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,866 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,867 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,868 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,869 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,873 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,874 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:19,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:39:19,877 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:19,919 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:19,960 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:20,000 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:20,039 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:20,082 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:20,158 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:20,162 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-18 09:39:20,227 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:20,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-02-18 09:39:20,230 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:20,303 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:20,304 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-18 09:39:20,498 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2019-02-18 09:39:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:20,499 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:39:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:20,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:39:20,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 09:39:20,739 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:39:20,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 09:39:20,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 09:39:20,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 09:39:20,740 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2019-02-18 09:39:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:39:21,652 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2019-02-18 09:39:21,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 09:39:21,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 09:39:21,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:39:21,655 INFO L225 Difference]: With dead ends: 62 [2019-02-18 09:39:21,655 INFO L226 Difference]: Without dead ends: 60 [2019-02-18 09:39:21,656 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-18 09:39:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-02-18 09:39:21,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2019-02-18 09:39:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-02-18 09:39:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2019-02-18 09:39:21,665 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2019-02-18 09:39:21,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:39:21,665 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2019-02-18 09:39:21,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 09:39:21,665 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2019-02-18 09:39:21,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:39:21,666 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:39:21,666 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:39:21,666 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:39:21,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:21,667 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2019-02-18 09:39:21,667 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:39:21,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:21,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:21,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:21,668 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:39:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:21,723 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-18 09:39:21,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-18 09:39:21,724 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 09:39:21,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-18 09:39:21,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-18 09:39:21,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-18 09:39:21,725 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2019-02-18 09:39:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:39:21,818 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2019-02-18 09:39:21,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-18 09:39:21,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-02-18 09:39:21,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:39:21,819 INFO L225 Difference]: With dead ends: 31 [2019-02-18 09:39:21,819 INFO L226 Difference]: Without dead ends: 30 [2019-02-18 09:39:21,820 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 [2019-02-18 09:39:21,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-02-18 09:39:21,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-02-18 09:39:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-02-18 09:39:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2019-02-18 09:39:21,831 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2019-02-18 09:39:21,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:39:21,832 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2019-02-18 09:39:21,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-18 09:39:21,832 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2019-02-18 09:39:21,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:39:21,832 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:39:21,833 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:39:21,833 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:39:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:21,833 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2019-02-18 09:39:21,833 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:39:21,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:21,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:21,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:21,834 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:39:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:21,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:21,885 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:39:21,885 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 09:39:21,885 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2019-02-18 09:39:21,888 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:39:21,889 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:39:21,897 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:39:21,897 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:39:21,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:21,899 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:39:21,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:21,899 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 [2019-02-18 09:39:21,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:21,908 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:39:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:21,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:39:22,033 WARN L181 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-02-18 09:39:22,039 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:39:22,093 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:39:22,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,151 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,152 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:39:22,213 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,215 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,216 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,218 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,219 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,220 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:39:22,299 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,302 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,303 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,305 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,306 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,307 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,308 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:39:22,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,410 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,411 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,413 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,414 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,415 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,417 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:22,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:39:22,420 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:22,465 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:22,538 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:22,605 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:22,701 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:22,796 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:22,862 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:39:22,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:39:22,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:39:22,882 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:39:22,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:39:22,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:39:22,923 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:39:22,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:39:22,952 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:23,023 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:23,067 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:23,101 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:23,126 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:23,258 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:23,277 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:23,293 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:23,373 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:23,373 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:121, output treesize:125 [2019-02-18 09:39:23,502 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:23,504 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-02-18 09:39:23,505 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:23,596 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:23,599 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-18 09:39:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:23,619 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:39:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:23,644 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-02-18 09:39:23,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-02-18 09:39:23,644 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 09:39:23,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-18 09:39:23,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-18 09:39:23,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-18 09:39:23,645 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2019-02-18 09:39:23,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:39:23,746 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2019-02-18 09:39:23,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-18 09:39:23,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-02-18 09:39:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:39:23,749 INFO L225 Difference]: With dead ends: 32 [2019-02-18 09:39:23,749 INFO L226 Difference]: Without dead ends: 31 [2019-02-18 09:39:23,750 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 [2019-02-18 09:39:23,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-02-18 09:39:23,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-02-18 09:39:23,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-02-18 09:39:23,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2019-02-18 09:39:23,759 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2019-02-18 09:39:23,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:39:23,759 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2019-02-18 09:39:23,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-18 09:39:23,760 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2019-02-18 09:39:23,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:39:23,760 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:39:23,760 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:39:23,761 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:39:23,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:23,761 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2019-02-18 09:39:23,761 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:39:23,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:23,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:23,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:23,762 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:39:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:23,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:23,909 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:39:23,909 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 09:39:23,910 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2019-02-18 09:39:23,910 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:39:23,910 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:39:23,917 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:39:23,918 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:39:23,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:23,918 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:39:23,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:23,918 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 [2019-02-18 09:39:23,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:23,935 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:39:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:23,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:39:24,012 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:39:24,016 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:39:24,041 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,043 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,044 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:39:24,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,058 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,059 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:39:24,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,069 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,073 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:39:24,082 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,091 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,093 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:39:24,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,100 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,102 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,104 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,106 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,107 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:39:24,159 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:39:24,161 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:24,266 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:24,315 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:24,352 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:24,383 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:24,408 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:24,427 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:24,447 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:24,495 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,496 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:39:24,548 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:39:24,601 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,602 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,603 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,605 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:39:24,707 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,726 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,727 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,728 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,729 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,731 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:39:24,802 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,803 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,804 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,805 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,806 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,808 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,809 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,813 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:24,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:39:25,214 WARN L181 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-02-18 09:39:25,219 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:25,220 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:25,221 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:25,222 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:25,224 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:25,225 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:25,226 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:25,227 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:25,229 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:25,230 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:25,231 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:39:25,232 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:25,269 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:25,308 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:25,352 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:25,398 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:25,443 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:25,531 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:25,532 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-18 09:39:25,579 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:25,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-02-18 09:39:25,582 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:25,650 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:25,651 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-18 09:39:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:25,666 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:39:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:25,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:39:25,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 09:39:25,704 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:39:25,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 09:39:25,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 09:39:25,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 09:39:25,705 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2019-02-18 09:39:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:39:26,741 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2019-02-18 09:39:26,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 09:39:26,741 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 09:39:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:39:26,742 INFO L225 Difference]: With dead ends: 65 [2019-02-18 09:39:26,742 INFO L226 Difference]: Without dead ends: 64 [2019-02-18 09:39:26,743 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 [2019-02-18 09:39:26,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-02-18 09:39:26,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2019-02-18 09:39:26,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-02-18 09:39:26,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2019-02-18 09:39:26,752 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2019-02-18 09:39:26,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:39:26,752 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2019-02-18 09:39:26,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 09:39:26,753 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2019-02-18 09:39:26,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-18 09:39:26,753 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:39:26,753 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-18 09:39:26,754 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:39:26,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:26,754 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2019-02-18 09:39:26,754 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:39:26,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:26,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:26,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:26,755 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:39:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:26,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:26,847 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:39:26,847 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-18 09:39:26,847 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2019-02-18 09:39:26,848 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:39:26,849 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:39:26,855 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:39:26,855 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:39:26,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:26,856 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:39:26,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:26,856 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 [2019-02-18 09:39:26,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:26,878 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:39:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:26,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:39:26,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:39:26,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:39:26,931 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:26,932 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:26,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:39:26,942 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:26,944 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:26,946 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:26,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:39:26,954 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:26,956 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:26,958 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:26,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:26,961 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:39:27,001 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,023 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,045 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,069 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,096 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,096 INFO L303 Elim1Store]: Index analysis took 132 ms [2019-02-18 09:39:27,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:39:27,107 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,109 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,114 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,115 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:39:27,265 INFO L303 Elim1Store]: Index analysis took 145 ms [2019-02-18 09:39:27,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:39:27,267 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:27,329 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:27,375 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:27,410 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:27,437 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:27,468 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:27,488 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:27,507 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:27,554 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,555 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:39:27,599 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,600 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:39:27,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,650 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,651 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,652 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:39:27,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,710 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,712 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,713 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,714 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:39:27,797 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,799 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,801 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,803 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,805 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,807 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,809 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,811 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:39:27,927 WARN L181 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-02-18 09:39:27,933 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,935 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,937 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,939 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,941 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,943 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,945 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,947 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,949 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,951 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:27,952 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:39:27,952 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:27,998 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:28,047 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:28,093 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:28,149 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:28,190 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:28,261 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:28,262 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-18 09:39:28,299 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:28,300 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-02-18 09:39:28,301 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:28,369 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:28,370 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-18 09:39:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:28,388 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:39:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:28,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:39:28,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 09:39:28,419 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:39:28,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 09:39:28,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 09:39:28,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 09:39:28,420 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2019-02-18 09:39:29,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:39:29,145 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2019-02-18 09:39:29,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 09:39:29,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-18 09:39:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:39:29,146 INFO L225 Difference]: With dead ends: 67 [2019-02-18 09:39:29,146 INFO L226 Difference]: Without dead ends: 65 [2019-02-18 09:39:29,147 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 [2019-02-18 09:39:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-02-18 09:39:29,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2019-02-18 09:39:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-02-18 09:39:29,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 132 transitions. [2019-02-18 09:39:29,155 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 132 transitions. Word has length 3 [2019-02-18 09:39:29,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:39:29,155 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 132 transitions. [2019-02-18 09:39:29,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 09:39:29,155 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 132 transitions. [2019-02-18 09:39:29,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:39:29,156 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:39:29,156 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:39:29,156 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:39:29,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:29,157 INFO L82 PathProgramCache]: Analyzing trace with hash 954866, now seen corresponding path program 1 times [2019-02-18 09:39:29,157 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:39:29,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:29,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:29,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:29,158 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:39:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:29,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:29,260 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:39:29,260 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:39:29,260 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [35] [2019-02-18 09:39:29,261 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:39:29,262 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:39:29,268 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:39:29,268 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:39:29,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:29,269 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:39:29,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:29,269 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 [2019-02-18 09:39:29,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:29,281 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:39:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:29,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:39:29,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:39:29,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:39:29,342 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,344 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:39:29,353 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,355 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,357 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:39:29,363 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,364 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,365 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,366 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:39:29,378 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,380 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,383 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,384 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,384 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:39:29,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,404 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,405 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,405 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:39:29,417 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,418 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,418 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,419 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,420 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,421 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,422 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,424 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-18 09:39:29,426 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:29,646 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:29,744 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:29,778 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:29,807 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:29,832 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:29,853 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:29,873 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:29,922 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:29,923 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-18 09:39:30,001 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,002 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 09:39:30,102 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,103 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,104 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,105 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-18 09:39:30,191 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,192 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,193 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,194 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,196 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-18 09:39:30,278 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,279 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,280 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,281 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,282 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,283 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,284 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,293 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-18 09:39:30,398 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,399 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,399 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,401 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,405 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-18 09:39:30,558 WARN L181 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 09:39:30,570 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,571 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,571 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,572 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,573 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,574 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,575 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,576 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,577 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,578 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,579 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,580 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:30,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-18 09:39:30,582 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:30,639 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:30,695 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:30,754 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:30,814 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:30,874 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:30,933 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:31,078 INFO L267 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. [2019-02-18 09:39:31,079 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-18 09:39:31,130 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:31,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-18 09:39:31,132 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:31,236 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:31,237 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-18 09:39:31,368 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:31,391 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:31,392 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:31,392 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:31,393 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:31,394 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:31,395 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:31,396 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:31,397 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:31,398 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:39:31,400 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-02-18 09:39:31,401 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:31,495 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:31,496 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-02-18 09:39:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:31,566 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:39:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:31,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:39:31,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 09:39:31,632 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:39:31,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:39:31,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:39:31,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 09:39:31,633 INFO L87 Difference]: Start difference. First operand 34 states and 132 transitions. Second operand 8 states. [2019-02-18 09:39:36,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:39:36,042 INFO L93 Difference]: Finished difference Result 82 states and 191 transitions. [2019-02-18 09:39:36,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 09:39:36,043 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 09:39:36,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:39:36,045 INFO L225 Difference]: With dead ends: 82 [2019-02-18 09:39:36,045 INFO L226 Difference]: Without dead ends: 80 [2019-02-18 09:39:36,046 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 [2019-02-18 09:39:36,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-02-18 09:39:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2019-02-18 09:39:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-02-18 09:39:36,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 128 transitions. [2019-02-18 09:39:36,055 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 128 transitions. Word has length 4 [2019-02-18 09:39:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:39:36,055 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 128 transitions. [2019-02-18 09:39:36,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 09:39:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 128 transitions. [2019-02-18 09:39:36,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:39:36,056 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:39:36,056 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:39:36,056 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:39:36,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:36,057 INFO L82 PathProgramCache]: Analyzing trace with hash 955426, now seen corresponding path program 1 times [2019-02-18 09:39:36,057 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:39:36,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:36,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:36,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:36,058 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:39:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:36,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:36,125 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:39:36,125 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:39:36,125 INFO L207 CegarAbsIntRunner]: [0], [32], [36], [37] [2019-02-18 09:39:36,127 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:39:36,127 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:39:36,136 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:39:36,136 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:39:36,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:36,137 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:39:36,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:36,137 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 [2019-02-18 09:39:36,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:36,148 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:39:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:36,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:39:36,173 INFO L478 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 86 treesize of output 76 [2019-02-18 09:39:36,200 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,229 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-02-18 09:39:36,282 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,284 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,290 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,293 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-02-18 09:39:36,380 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,382 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,385 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,387 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,390 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,396 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,397 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-02-18 09:39:36,499 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2019-02-18 09:39:36,508 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,511 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,513 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,515 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,517 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,520 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,522 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,528 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,529 INFO L478 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 42 treesize of output 101 [2019-02-18 09:39:36,656 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,662 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,664 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,666 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,669 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,673 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,675 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,677 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,682 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:36,683 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-02-18 09:39:36,684 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:36,738 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:36,799 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:36,856 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:36,916 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:36,980 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:37,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:39:37,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-02-18 09:39:37,123 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-02-18 09:39:37,127 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-02-18 09:39:37,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-02-18 09:39:37,137 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-02-18 09:39:37,162 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-02-18 09:39:37,174 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-02-18 09:39:37,175 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:37,228 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:37,268 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:37,299 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:37,324 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:37,344 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:37,361 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:37,377 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:37,447 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:37,447 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-02-18 09:39:38,209 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:38,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 149 [2019-02-18 09:39:38,272 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-02-18 09:39:38,328 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-02-18 09:39:40,202 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 54 dim-0 vars, and 9 xjuncts. [2019-02-18 09:39:40,202 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:131, output treesize:861 [2019-02-18 09:39:56,977 WARN L181 SmtUtils]: Spent 13.54 s on a formula simplification. DAG size of input: 474 DAG size of output: 98 [2019-02-18 09:39:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:56,983 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:39:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:57,006 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-02-18 09:39:57,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-02-18 09:39:57,007 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-18 09:39:57,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-18 09:39:57,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-18 09:39:57,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-18 09:39:57,007 INFO L87 Difference]: Start difference. First operand 36 states and 128 transitions. Second operand 4 states. [2019-02-18 09:39:57,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:39:57,063 INFO L93 Difference]: Finished difference Result 40 states and 140 transitions. [2019-02-18 09:39:57,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-18 09:39:57,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-02-18 09:39:57,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:39:57,064 INFO L225 Difference]: With dead ends: 40 [2019-02-18 09:39:57,065 INFO L226 Difference]: Without dead ends: 39 [2019-02-18 09:39:57,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-18 09:39:57,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-02-18 09:39:57,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-02-18 09:39:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-02-18 09:39:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 138 transitions. [2019-02-18 09:39:57,074 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 138 transitions. Word has length 4 [2019-02-18 09:39:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:39:57,074 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 138 transitions. [2019-02-18 09:39:57,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-18 09:39:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 138 transitions. [2019-02-18 09:39:57,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:39:57,075 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:39:57,075 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:39:57,075 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:39:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:57,076 INFO L82 PathProgramCache]: Analyzing trace with hash 954990, now seen corresponding path program 1 times [2019-02-18 09:39:57,076 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:39:57,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:57,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:57,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:39:57,077 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:39:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:57,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:57,396 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:39:57,396 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:39:57,396 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [35] [2019-02-18 09:39:57,397 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:39:57,397 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:39:57,402 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:39:57,403 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:39:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:39:57,403 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:39:57,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:39:57,403 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 [2019-02-18 09:39:57,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:39:57,419 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:39:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:39:57,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:39:57,520 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,521 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-18 09:39:57,573 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,575 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,575 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 09:39:57,631 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,634 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,637 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-18 09:39:57,706 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,712 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,714 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,718 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,720 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,721 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-18 09:39:57,801 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,805 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,807 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,810 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,812 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,815 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,817 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,820 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-18 09:39:57,922 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-02-18 09:39:57,928 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,930 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,931 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,933 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,934 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,936 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,938 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,941 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,943 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,946 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:57,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-18 09:39:58,071 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 09:39:58,077 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:58,079 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:58,081 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:58,083 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:58,085 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:58,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:58,089 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:58,090 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:58,091 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:58,093 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:58,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:58,095 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:58,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-18 09:39:58,097 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:58,162 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:58,229 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:58,300 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:58,369 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:58,444 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:58,519 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:58,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:39:58,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:39:58,611 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:39:58,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:39:58,647 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:39:58,663 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:39:58,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:39:58,695 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-18 09:39:58,696 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:58,783 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:58,822 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:58,855 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:58,881 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:58,905 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:58,924 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:58,946 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:39:59,049 INFO L267 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. [2019-02-18 09:39:59,049 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-18 09:39:59,080 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:59,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-18 09:39:59,081 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:59,171 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:59,171 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-18 09:39:59,199 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:59,200 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:59,201 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:59,202 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:59,203 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:59,204 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:59,205 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:59,206 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:59,207 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:59,208 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:39:59,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-02-18 09:39:59,211 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:39:59,327 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-18 09:39:59,327 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-02-18 09:39:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:59,408 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:39:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:39:59,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:39:59,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 09:39:59,473 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:39:59,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:39:59,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:39:59,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-18 09:39:59,475 INFO L87 Difference]: Start difference. First operand 38 states and 138 transitions. Second operand 8 states. [2019-02-18 09:40:03,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:03,538 INFO L93 Difference]: Finished difference Result 84 states and 220 transitions. [2019-02-18 09:40:03,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 09:40:03,539 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 09:40:03,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:03,540 INFO L225 Difference]: With dead ends: 84 [2019-02-18 09:40:03,541 INFO L226 Difference]: Without dead ends: 82 [2019-02-18 09:40:03,541 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-18 09:40:03,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-02-18 09:40:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2019-02-18 09:40:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-02-18 09:40:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-02-18 09:40:03,554 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-02-18 09:40:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:03,554 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-02-18 09:40:03,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 09:40:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-02-18 09:40:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:40:03,555 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:03,555 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:40:03,556 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:03,556 INFO L82 PathProgramCache]: Analyzing trace with hash 954618, now seen corresponding path program 1 times [2019-02-18 09:40:03,556 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:03,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:03,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:03,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:03,557 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:03,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:03,658 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:03,658 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:40:03,658 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [35] [2019-02-18 09:40:03,659 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:03,660 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:03,664 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:03,664 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:40:03,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:03,665 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:03,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:03,665 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-02-18 09:40:03,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:03,675 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:03,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:03,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:03,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-18 09:40:03,818 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:03,819 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:03,820 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 09:40:03,889 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:03,890 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:03,891 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:03,892 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:03,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-18 09:40:03,958 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:03,959 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:03,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:03,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:03,963 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:03,989 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:03,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-18 09:40:04,079 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,081 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,082 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,083 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,085 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,089 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-18 09:40:04,188 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,189 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,190 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,192 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,193 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,194 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,195 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,198 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,199 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-18 09:40:04,327 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 09:40:04,331 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,331 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,332 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,333 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,335 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,336 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,337 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,338 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,339 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,340 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,342 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,343 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:04,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-18 09:40:04,345 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:04,407 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:04,465 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:04,530 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:04,591 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:04,652 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:04,714 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:04,800 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:40:04,803 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:40:04,806 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:40:04,810 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:40:04,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:40:04,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:40:04,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:40:04,826 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-18 09:40:04,827 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:04,898 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:04,939 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:04,971 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:04,996 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:05,016 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:05,032 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:05,048 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:05,141 INFO L267 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. [2019-02-18 09:40:05,142 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-18 09:40:05,176 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:05,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-18 09:40:05,179 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:05,268 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:05,269 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-18 09:40:05,346 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:05,369 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:05,392 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:05,416 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:05,438 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:05,463 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:05,495 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:05,518 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:05,539 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:05,557 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:40:05,557 INFO L303 Elim1Store]: Index analysis took 258 ms [2019-02-18 09:40:05,558 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-02-18 09:40:05,559 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:05,734 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:05,734 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-02-18 09:40:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:05,756 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:40:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:05,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:40:05,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 09:40:05,797 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:40:05,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:40:05,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:40:05,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 09:40:05,798 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-02-18 09:40:09,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:09,746 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-02-18 09:40:09,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 09:40:09,746 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 09:40:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:09,747 INFO L225 Difference]: With dead ends: 81 [2019-02-18 09:40:09,748 INFO L226 Difference]: Without dead ends: 80 [2019-02-18 09:40:09,748 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-02-18 09:40:09,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-02-18 09:40:09,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2019-02-18 09:40:09,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-02-18 09:40:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-02-18 09:40:09,757 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-02-18 09:40:09,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:09,757 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-02-18 09:40:09,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 09:40:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-02-18 09:40:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:40:09,758 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:09,758 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:40:09,758 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:09,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:09,759 INFO L82 PathProgramCache]: Analyzing trace with hash 955114, now seen corresponding path program 1 times [2019-02-18 09:40:09,759 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:09,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:09,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:09,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:09,760 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:09,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:09,877 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:09,877 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:40:09,877 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [35] [2019-02-18 09:40:09,879 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:09,879 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:09,884 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:09,884 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:40:09,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:09,885 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:09,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:09,885 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 [2019-02-18 09:40:09,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:09,898 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:09,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:09,938 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:09,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-18 09:40:09,993 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:09,995 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:09,996 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 09:40:10,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,059 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-18 09:40:10,128 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,132 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,134 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,137 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,140 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,143 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,144 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-18 09:40:10,234 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,236 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,238 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,240 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,242 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,244 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,245 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-18 09:40:10,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,349 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,355 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,357 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,360 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,362 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,365 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,367 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,370 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-18 09:40:10,532 WARN L181 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 09:40:10,538 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,539 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,541 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,543 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,544 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,546 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,550 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,551 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,553 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,557 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:10,557 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-18 09:40:10,558 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:10,623 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:10,691 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:10,760 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:10,832 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:10,908 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:10,980 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:11,070 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:40:11,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:40:11,075 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:40:11,082 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:40:11,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:40:11,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:40:11,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:40:11,095 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-18 09:40:11,096 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:11,167 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:11,208 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:11,239 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:11,264 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:11,285 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:11,302 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:11,318 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:11,410 INFO L267 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. [2019-02-18 09:40:11,411 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-18 09:40:11,446 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:11,447 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-18 09:40:11,447 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:11,539 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:11,540 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-18 09:40:11,576 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:11,577 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:11,577 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:11,578 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:11,580 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:11,581 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:11,582 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:11,583 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:11,584 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:11,585 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:40:11,586 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-02-18 09:40:11,587 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:11,682 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:11,683 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-02-18 09:40:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:11,876 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:40:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:11,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:40:11,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 09:40:11,921 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:40:11,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:40:11,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:40:11,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 09:40:11,922 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-02-18 09:40:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:13,665 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-02-18 09:40:13,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 09:40:13,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 09:40:13,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:13,666 INFO L225 Difference]: With dead ends: 81 [2019-02-18 09:40:13,667 INFO L226 Difference]: Without dead ends: 79 [2019-02-18 09:40:13,667 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 [2019-02-18 09:40:13,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-02-18 09:40:13,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2019-02-18 09:40:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-02-18 09:40:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 175 transitions. [2019-02-18 09:40:13,678 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 175 transitions. Word has length 4 [2019-02-18 09:40:13,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:13,678 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 175 transitions. [2019-02-18 09:40:13,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 09:40:13,678 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 175 transitions. [2019-02-18 09:40:13,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:40:13,679 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:13,679 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:40:13,679 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:13,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:13,680 INFO L82 PathProgramCache]: Analyzing trace with hash 954742, now seen corresponding path program 1 times [2019-02-18 09:40:13,680 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:13,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:13,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:13,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:13,681 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:13,978 WARN L181 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2019-02-18 09:40:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:14,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:14,020 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:14,020 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:40:14,020 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [35] [2019-02-18 09:40:14,022 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:14,022 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:14,027 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:14,027 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:40:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:14,028 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:14,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:14,028 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 [2019-02-18 09:40:14,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:14,037 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:14,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:14,113 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:40:14,133 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:40:14,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,150 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:40:14,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,154 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,155 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,155 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:40:14,161 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,162 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,163 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,164 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:40:14,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,181 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,182 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,183 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,184 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:40:14,189 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,190 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,191 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,193 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,194 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,196 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:40:14,203 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,203 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,205 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,206 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,207 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,209 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,210 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-18 09:40:14,212 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:14,289 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:14,334 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:14,369 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:14,395 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:14,419 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:14,437 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:14,456 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:14,506 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,507 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-18 09:40:14,556 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,558 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,558 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 09:40:14,616 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,618 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,620 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:14,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-18 09:40:15,333 WARN L181 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-02-18 09:40:15,373 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:15,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:15,424 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:15,437 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:15,468 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:15,490 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:15,490 INFO L303 Elim1Store]: Index analysis took 155 ms [2019-02-18 09:40:15,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-18 09:40:16,058 WARN L181 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-02-18 09:40:16,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,063 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,067 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,069 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,070 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,071 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-18 09:40:16,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,171 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,171 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,173 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,174 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,175 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,176 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,177 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,178 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,179 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-18 09:40:16,302 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 09:40:16,306 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,307 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,309 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,310 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,311 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,312 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,313 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,314 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,315 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,316 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,317 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,318 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,319 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-18 09:40:16,320 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,376 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,431 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,488 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,546 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,604 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,664 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,764 INFO L267 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. [2019-02-18 09:40:16,765 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-18 09:40:16,804 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-18 09:40:16,806 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:16,895 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:16,896 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-18 09:40:16,969 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,983 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,984 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,986 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,986 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,987 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,988 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,988 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,989 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,990 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:16,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-02-18 09:40:16,993 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:17,087 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:17,087 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-02-18 09:40:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:17,303 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:40:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:17,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:40:17,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 09:40:17,351 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:40:17,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:40:17,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:40:17,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-02-18 09:40:17,352 INFO L87 Difference]: Start difference. First operand 44 states and 175 transitions. Second operand 8 states. [2019-02-18 09:40:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:20,853 INFO L93 Difference]: Finished difference Result 99 states and 274 transitions. [2019-02-18 09:40:20,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 09:40:20,854 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 09:40:20,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:20,855 INFO L225 Difference]: With dead ends: 99 [2019-02-18 09:40:20,855 INFO L226 Difference]: Without dead ends: 95 [2019-02-18 09:40:20,855 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-02-18 09:40:20,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-02-18 09:40:20,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2019-02-18 09:40:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-02-18 09:40:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 210 transitions. [2019-02-18 09:40:20,866 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 210 transitions. Word has length 4 [2019-02-18 09:40:20,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:20,867 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 210 transitions. [2019-02-18 09:40:20,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 09:40:20,867 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 210 transitions. [2019-02-18 09:40:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:40:20,867 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:20,868 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:40:20,868 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:20,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:20,868 INFO L82 PathProgramCache]: Analyzing trace with hash 941536, now seen corresponding path program 1 times [2019-02-18 09:40:20,868 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:20,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:20,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:20,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:20,869 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:21,167 WARN L181 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-02-18 09:40:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:21,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:21,366 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:21,366 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:40:21,366 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [35] [2019-02-18 09:40:21,367 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:21,367 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:21,371 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:21,372 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:40:21,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:21,372 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:21,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:21,373 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:40:21,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:21,395 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:21,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:21,599 WARN L181 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-02-18 09:40:21,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:40:21,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:40:21,611 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,612 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:40:21,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,619 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,621 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,622 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:40:21,645 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,646 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,647 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,649 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:40:21,653 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,654 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,656 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,657 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,658 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:40:21,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,673 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:40:21,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:40:21,695 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:21,752 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:21,798 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:21,832 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:21,861 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:21,884 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:21,902 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:21,920 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:21,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:21,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:40:22,006 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:40:22,054 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,057 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,058 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,059 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:40:22,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,114 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,116 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,117 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:40:22,186 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,187 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,188 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,189 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,190 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,191 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,192 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,193 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,194 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:40:22,282 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,284 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,285 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,286 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,287 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,288 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,289 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,290 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,291 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,292 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:40:22,294 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:22,353 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:22,391 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:22,435 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:22,475 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:22,521 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:22,590 INFO L267 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. [2019-02-18 09:40:22,590 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 09:40:22,637 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-02-18 09:40:22,638 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:22,700 INFO L267 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. [2019-02-18 09:40:22,701 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 09:40:22,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,731 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,734 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,735 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,736 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:22,740 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 134 [2019-02-18 09:40:22,741 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:22,805 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:22,806 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-02-18 09:40:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:22,827 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:40:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:22,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:40:22,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 09:40:22,867 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:40:22,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:40:22,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:40:22,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-18 09:40:22,868 INFO L87 Difference]: Start difference. First operand 52 states and 210 transitions. Second operand 8 states. [2019-02-18 09:40:23,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:23,349 INFO L93 Difference]: Finished difference Result 101 states and 289 transitions. [2019-02-18 09:40:23,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 09:40:23,350 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 09:40:23,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:23,351 INFO L225 Difference]: With dead ends: 101 [2019-02-18 09:40:23,351 INFO L226 Difference]: Without dead ends: 99 [2019-02-18 09:40:23,352 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-18 09:40:23,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-02-18 09:40:23,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2019-02-18 09:40:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-02-18 09:40:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 243 transitions. [2019-02-18 09:40:23,365 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 243 transitions. Word has length 4 [2019-02-18 09:40:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:23,365 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 243 transitions. [2019-02-18 09:40:23,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 09:40:23,365 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 243 transitions. [2019-02-18 09:40:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:40:23,366 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:23,366 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:40:23,366 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:23,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:23,367 INFO L82 PathProgramCache]: Analyzing trace with hash 941164, now seen corresponding path program 1 times [2019-02-18 09:40:23,367 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:23,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:23,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:23,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:23,368 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:23,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:23,523 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:23,523 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:40:23,523 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [35] [2019-02-18 09:40:23,525 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:23,525 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:23,529 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:23,529 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:40:23,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:23,529 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:23,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:23,530 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:40:23,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:23,539 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:23,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:23,579 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:23,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:40:24,059 WARN L181 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-02-18 09:40:24,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,117 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:40:24,412 WARN L181 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2019-02-18 09:40:24,415 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,416 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,417 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,418 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:40:24,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,476 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,477 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,477 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,478 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,479 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:40:24,550 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,551 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,552 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,553 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,556 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,557 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,558 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:40:24,664 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,665 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,665 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,666 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,667 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,668 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,669 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:24,673 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:40:24,674 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:24,714 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:24,755 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:24,797 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:24,836 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:24,878 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:24,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:40:24,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:40:24,937 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:40:24,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:40:24,945 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:40:24,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:40:24,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:40:25,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:40:25,040 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:25,092 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:25,132 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:25,162 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:25,187 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:25,207 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:25,224 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:25,240 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:25,309 INFO L267 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. [2019-02-18 09:40:25,310 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 09:40:25,366 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:25,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-02-18 09:40:25,367 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:25,429 INFO L267 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. [2019-02-18 09:40:25,429 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 09:40:25,459 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:25,459 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:25,460 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:25,461 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:25,462 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:25,463 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:25,464 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:25,465 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:40:25,466 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-02-18 09:40:25,467 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:25,534 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:25,535 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-02-18 09:40:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:25,563 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:40:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:25,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:40:25,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 09:40:25,640 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:40:25,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:40:25,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:40:25,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 09:40:25,641 INFO L87 Difference]: Start difference. First operand 59 states and 243 transitions. Second operand 8 states. [2019-02-18 09:40:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:36,866 INFO L93 Difference]: Finished difference Result 99 states and 302 transitions. [2019-02-18 09:40:36,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 09:40:36,867 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 09:40:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:36,868 INFO L225 Difference]: With dead ends: 99 [2019-02-18 09:40:36,868 INFO L226 Difference]: Without dead ends: 98 [2019-02-18 09:40:36,869 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 [2019-02-18 09:40:36,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-02-18 09:40:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2019-02-18 09:40:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-02-18 09:40:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 261 transitions. [2019-02-18 09:40:36,883 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 261 transitions. Word has length 4 [2019-02-18 09:40:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:36,884 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 261 transitions. [2019-02-18 09:40:36,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 09:40:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 261 transitions. [2019-02-18 09:40:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:40:36,885 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:36,885 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:40:36,885 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:36,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:36,885 INFO L82 PathProgramCache]: Analyzing trace with hash 941660, now seen corresponding path program 1 times [2019-02-18 09:40:36,885 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:36,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:36,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:36,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:36,887 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:36,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:36,962 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:36,963 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:40:36,963 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [35] [2019-02-18 09:40:36,964 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:36,964 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:36,968 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:36,968 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:40:36,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:36,969 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:36,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:36,969 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:40:36,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:36,989 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:36,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:37,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:40:37,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:40:37,040 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,041 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:40:37,049 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:40:37,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,058 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:40:37,067 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,070 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,072 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,074 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,075 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:40:37,080 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,082 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,083 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,085 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,089 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:40:37,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:40:37,158 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:37,217 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:37,261 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:37,294 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:37,323 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:37,346 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:37,364 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:37,429 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:37,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,475 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:40:37,520 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,522 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:40:37,570 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,571 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,573 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,574 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:40:37,632 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,634 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,635 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,636 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,637 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,638 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:40:37,708 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,710 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,711 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,712 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,713 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,714 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,716 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:40:37,807 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,808 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,809 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,810 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,811 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,812 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,813 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,814 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,816 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,817 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:37,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:40:37,818 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:37,887 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:37,926 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:37,965 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:38,005 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:38,043 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:38,112 INFO L267 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. [2019-02-18 09:40:38,113 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 09:40:38,168 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:38,169 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-02-18 09:40:38,170 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:38,233 INFO L267 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. [2019-02-18 09:40:38,233 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 09:40:38,270 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:38,271 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:38,271 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:38,272 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:38,273 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:38,274 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:38,275 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:38,276 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:40:38,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-02-18 09:40:38,278 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:38,343 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:38,343 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-02-18 09:40:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:38,443 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:40:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:38,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:40:38,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 09:40:38,483 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:40:38,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:40:38,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:40:38,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 09:40:38,484 INFO L87 Difference]: Start difference. First operand 61 states and 261 transitions. Second operand 8 states. [2019-02-18 09:40:39,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:39,140 INFO L93 Difference]: Finished difference Result 101 states and 320 transitions. [2019-02-18 09:40:39,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 09:40:39,140 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 09:40:39,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:39,141 INFO L225 Difference]: With dead ends: 101 [2019-02-18 09:40:39,142 INFO L226 Difference]: Without dead ends: 99 [2019-02-18 09:40:39,142 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-02-18 09:40:39,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-02-18 09:40:39,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2019-02-18 09:40:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-02-18 09:40:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 278 transitions. [2019-02-18 09:40:39,157 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 278 transitions. Word has length 4 [2019-02-18 09:40:39,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:39,157 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 278 transitions. [2019-02-18 09:40:39,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 09:40:39,158 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 278 transitions. [2019-02-18 09:40:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:40:39,158 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:39,158 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:40:39,159 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:39,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:39,159 INFO L82 PathProgramCache]: Analyzing trace with hash 941288, now seen corresponding path program 1 times [2019-02-18 09:40:39,159 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:39,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:39,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:39,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:39,160 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:39,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:39,259 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:39,259 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:40:39,260 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [35] [2019-02-18 09:40:39,261 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:39,261 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:39,265 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:39,266 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:40:39,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:39,266 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:39,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:39,266 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:40:39,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:39,277 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:39,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:39,533 WARN L181 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-02-18 09:40:39,569 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:39,570 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:40:40,039 WARN L181 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-02-18 09:40:40,074 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:40,101 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:40,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:40:40,627 WARN L181 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2019-02-18 09:40:40,659 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:40,680 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:40,705 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:40,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:40,732 INFO L303 Elim1Store]: Index analysis took 103 ms [2019-02-18 09:40:40,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:40:41,420 WARN L181 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2019-02-18 09:40:41,448 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:41,473 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:41,498 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:41,512 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:41,538 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:41,559 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:41,559 INFO L303 Elim1Store]: Index analysis took 138 ms [2019-02-18 09:40:41,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:40:41,861 WARN L181 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2019-02-18 09:40:41,902 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:41,924 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:41,941 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:41,942 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:41,943 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:41,944 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:41,945 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:41,946 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:41,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:40:42,036 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,038 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,039 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,040 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,040 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,041 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,042 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,043 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,044 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,046 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:40:42,047 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,085 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,125 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,166 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,206 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,248 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:40:42,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:40:42,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:40:42,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:40:42,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:40:42,340 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:40:42,343 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:40:42,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:40:42,354 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,408 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,449 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,481 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,506 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,526 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,543 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,559 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,628 INFO L267 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. [2019-02-18 09:40:42,629 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 09:40:42,676 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-02-18 09:40:42,677 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,739 INFO L267 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. [2019-02-18 09:40:42,740 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 09:40:42,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,767 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,767 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,769 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,771 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,772 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,773 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,774 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:42,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-02-18 09:40:42,775 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:42,848 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:42,848 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-02-18 09:40:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:42,870 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:40:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:42,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:40:42,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 09:40:42,910 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:40:42,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:40:42,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:40:42,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-02-18 09:40:42,911 INFO L87 Difference]: Start difference. First operand 62 states and 278 transitions. Second operand 8 states. [2019-02-18 09:40:43,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:43,670 INFO L93 Difference]: Finished difference Result 106 states and 350 transitions. [2019-02-18 09:40:43,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 09:40:43,670 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 09:40:43,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:43,672 INFO L225 Difference]: With dead ends: 106 [2019-02-18 09:40:43,672 INFO L226 Difference]: Without dead ends: 104 [2019-02-18 09:40:43,672 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-02-18 09:40:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-02-18 09:40:43,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2019-02-18 09:40:43,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-02-18 09:40:43,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 304 transitions. [2019-02-18 09:40:43,687 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 304 transitions. Word has length 4 [2019-02-18 09:40:43,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:43,687 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 304 transitions. [2019-02-18 09:40:43,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 09:40:43,687 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 304 transitions. [2019-02-18 09:40:43,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:40:43,688 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:43,688 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:40:43,688 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:43,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:43,689 INFO L82 PathProgramCache]: Analyzing trace with hash 941784, now seen corresponding path program 1 times [2019-02-18 09:40:43,689 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:43,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:43,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:43,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:43,690 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:43,905 WARN L181 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-02-18 09:40:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:43,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:43,917 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:43,917 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:40:43,918 INFO L207 CegarAbsIntRunner]: [0], [18], [30], [35] [2019-02-18 09:40:43,919 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:43,919 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:43,924 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:43,925 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:40:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:43,925 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:43,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:43,925 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:40:43,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:43,936 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:43,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:43,975 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:40:43,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:40:43,981 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:43,982 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:43,983 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:40:43,986 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:43,988 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:43,990 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:43,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:40:43,994 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:43,995 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:43,996 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:43,998 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:43,998 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:40:44,002 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,003 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,006 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:40:44,013 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,014 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,015 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,016 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,017 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,019 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,020 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:40:44,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:40:44,033 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:44,090 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:44,134 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:44,170 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:44,226 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:44,248 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:44,266 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:44,284 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:44,330 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:40:44,376 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,377 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:40:44,426 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,427 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,428 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,430 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:40:44,507 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,508 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,509 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,510 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,511 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,512 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,513 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:40:44,586 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,587 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,588 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,589 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,589 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,591 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,592 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,593 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:40:44,694 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,695 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,696 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,697 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,699 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,700 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,701 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:44,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:40:44,705 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:44,743 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:44,781 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:44,820 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:44,859 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:44,899 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:44,969 INFO L267 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. [2019-02-18 09:40:44,970 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 09:40:45,013 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:45,014 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-02-18 09:40:45,014 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:45,079 INFO L267 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. [2019-02-18 09:40:45,080 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 09:40:45,106 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:45,107 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:45,108 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:45,109 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:45,110 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:45,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:45,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:45,114 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:45,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:45,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-02-18 09:40:45,117 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:45,182 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:45,182 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-02-18 09:40:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:45,215 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:40:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:45,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:40:45,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 09:40:45,254 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:40:45,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:40:45,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:40:45,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-18 09:40:45,255 INFO L87 Difference]: Start difference. First operand 65 states and 304 transitions. Second operand 8 states. [2019-02-18 09:40:45,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:45,936 INFO L93 Difference]: Finished difference Result 107 states and 376 transitions. [2019-02-18 09:40:45,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 09:40:45,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 09:40:45,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:45,938 INFO L225 Difference]: With dead ends: 107 [2019-02-18 09:40:45,938 INFO L226 Difference]: Without dead ends: 99 [2019-02-18 09:40:45,939 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 [2019-02-18 09:40:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-02-18 09:40:45,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-02-18 09:40:45,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-02-18 09:40:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 328 transitions. [2019-02-18 09:40:45,952 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 328 transitions. Word has length 4 [2019-02-18 09:40:45,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:45,952 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 328 transitions. [2019-02-18 09:40:45,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 09:40:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 328 transitions. [2019-02-18 09:40:45,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:40:45,953 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:45,953 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:40:45,953 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:45,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:45,954 INFO L82 PathProgramCache]: Analyzing trace with hash 930314, now seen corresponding path program 1 times [2019-02-18 09:40:45,954 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:45,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:45,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:45,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:45,955 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:46,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:46,078 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:46,079 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:40:46,079 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [35] [2019-02-18 09:40:46,080 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:46,080 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:46,083 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:46,083 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:40:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:46,084 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:46,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:46,084 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:40:46,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:46,093 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:46,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:46,131 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:40:46,177 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,179 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:40:46,226 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,227 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,228 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,230 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:40:46,288 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,289 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,289 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,291 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,292 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,293 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:40:46,367 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,368 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,369 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,371 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,372 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,373 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,374 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,375 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:40:46,463 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,464 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,465 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,466 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,468 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,469 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,470 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,471 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,472 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,473 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:46,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:40:46,475 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:46,521 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:46,560 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:46,602 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:46,644 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:46,686 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:46,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:40:46,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:40:46,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:40:46,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:40:46,749 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:40:46,753 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:40:46,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:40:46,946 INFO L303 Elim1Store]: Index analysis took 172 ms [2019-02-18 09:40:46,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:40:46,947 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:47,028 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:47,144 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:47,317 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:47,342 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:47,362 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:47,380 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:47,396 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:47,472 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:47,473 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-18 09:40:47,567 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:47,577 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 135 [2019-02-18 09:40:47,579 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-18 09:40:47,802 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 12 dim-0 vars, and 2 xjuncts. [2019-02-18 09:40:47,802 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:201 [2019-02-18 09:40:47,851 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:47,854 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:47,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:47,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:47,863 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:47,865 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:47,867 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:47,869 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:47,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:47,871 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:47,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 12 case distinctions, treesize of input 111 treesize of output 165 [2019-02-18 09:40:47,919 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-02-18 09:40:47,934 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2019-02-18 09:40:49,008 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,012 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,013 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,014 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,015 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,015 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,016 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:49,017 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:40:49,018 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 126 [2019-02-18 09:40:49,018 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:49,419 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 2 dim-1 vars, End of recursive call: 49 dim-0 vars, and 8 xjuncts. [2019-02-18 09:40:49,419 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:218, output treesize:686 [2019-02-18 09:40:50,317 WARN L181 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 114 [2019-02-18 09:40:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:50,319 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:40:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:50,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:40:50,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-02-18 09:40:50,362 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:40:50,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:40:50,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:40:50,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-02-18 09:40:50,363 INFO L87 Difference]: Start difference. First operand 66 states and 328 transitions. Second operand 8 states. [2019-02-18 09:40:51,379 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 117 [2019-02-18 09:40:54,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:54,645 INFO L93 Difference]: Finished difference Result 155 states and 556 transitions. [2019-02-18 09:40:54,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-18 09:40:54,646 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 09:40:54,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:54,647 INFO L225 Difference]: With dead ends: 155 [2019-02-18 09:40:54,648 INFO L226 Difference]: Without dead ends: 152 [2019-02-18 09:40:54,648 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-02-18 09:40:54,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-02-18 09:40:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2019-02-18 09:40:54,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-02-18 09:40:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 438 transitions. [2019-02-18 09:40:54,666 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 438 transitions. Word has length 4 [2019-02-18 09:40:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:54,667 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 438 transitions. [2019-02-18 09:40:54,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 09:40:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 438 transitions. [2019-02-18 09:40:54,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:40:54,668 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:54,668 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:40:54,668 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:54,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:54,668 INFO L82 PathProgramCache]: Analyzing trace with hash 930440, now seen corresponding path program 1 times [2019-02-18 09:40:54,668 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:54,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:54,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:54,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:54,669 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:54,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:54,713 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:54,713 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:40:54,713 INFO L207 CegarAbsIntRunner]: [0], [6], [36], [37] [2019-02-18 09:40:54,714 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:54,714 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:54,717 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:54,717 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:40:54,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:54,718 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:54,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:54,718 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:40:54,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:54,735 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:54,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:54,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:40:54,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:40:54,793 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:40:54,806 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,807 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,807 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,808 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:40:54,812 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,814 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,816 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,817 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,818 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:40:54,834 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,835 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,836 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:40:54,857 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,863 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,865 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:54,866 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:40:54,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:40:54,877 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:54,942 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:54,990 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:55,026 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:55,058 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:55,082 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:55,099 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:55,117 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:55,164 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:40:55,210 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,211 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:40:55,261 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,262 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,263 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,264 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:40:55,323 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,323 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,324 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,325 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,325 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,326 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:40:55,398 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,399 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,400 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,401 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,404 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,405 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:40:55,495 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,496 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,497 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,499 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,500 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,501 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,502 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,503 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,504 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,505 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:40:55,506 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:55,545 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:55,583 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:55,622 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:55,662 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:55,702 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:55,771 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:55,771 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-18 09:40:55,806 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:55,807 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-02-18 09:40:55,808 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:55,872 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:55,872 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-18 09:40:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:55,890 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:40:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:55,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:40:55,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 09:40:55,919 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:40:55,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 09:40:55,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 09:40:55,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 09:40:55,920 INFO L87 Difference]: Start difference. First operand 78 states and 438 transitions. Second operand 6 states. [2019-02-18 09:40:56,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:56,237 INFO L93 Difference]: Finished difference Result 104 states and 471 transitions. [2019-02-18 09:40:56,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 09:40:56,237 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-18 09:40:56,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:56,239 INFO L225 Difference]: With dead ends: 104 [2019-02-18 09:40:56,239 INFO L226 Difference]: Without dead ends: 103 [2019-02-18 09:40:56,239 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-18 09:40:56,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-02-18 09:40:56,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2019-02-18 09:40:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-02-18 09:40:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-02-18 09:40:56,257 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-02-18 09:40:56,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:56,257 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-02-18 09:40:56,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 09:40:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-02-18 09:40:56,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:40:56,258 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:56,258 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:40:56,258 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:56,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:56,259 INFO L82 PathProgramCache]: Analyzing trace with hash 945816, now seen corresponding path program 1 times [2019-02-18 09:40:56,259 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:56,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:56,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:56,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:56,260 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:56,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:56,292 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:56,292 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:40:56,293 INFO L207 CegarAbsIntRunner]: [0], [22], [36], [37] [2019-02-18 09:40:56,294 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:56,294 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:56,297 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:56,297 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:40:56,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:56,298 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:56,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:56,298 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:40:56,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:56,311 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:56,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:56,320 INFO L478 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 27 treesize of output 30 [2019-02-18 09:40:56,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 30 treesize of output 32 [2019-02-18 09:40:56,332 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,334 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,334 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-02-18 09:40:56,341 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,343 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,346 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-02-18 09:40:56,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,358 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,361 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,363 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,363 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-02-18 09:40:56,368 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,370 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,374 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,376 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,377 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-02-18 09:40:56,383 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,384 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,385 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,387 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,389 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,391 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,392 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-02-18 09:40:56,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-02-18 09:40:56,405 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:56,464 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:56,505 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:56,537 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:56,562 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:56,584 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:56,602 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:56,618 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:56,655 INFO L478 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 86 treesize of output 76 [2019-02-18 09:40:56,676 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,678 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-02-18 09:40:56,721 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,722 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,724 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,725 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-02-18 09:40:56,780 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,781 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,782 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,783 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,784 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,786 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-02-18 09:40:56,855 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,856 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,857 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,858 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,864 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,864 INFO L478 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 42 treesize of output 101 [2019-02-18 09:40:56,947 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,948 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,949 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,950 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,951 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,952 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,953 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,954 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,955 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,957 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:56,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-02-18 09:40:56,959 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:56,993 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:57,029 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:57,066 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:57,103 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:57,143 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:57,208 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:57,209 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-02-18 09:40:57,242 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:57,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-02-18 09:40:57,243 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:57,305 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:57,306 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-02-18 09:40:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:57,324 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:40:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:57,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:40:57,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 09:40:57,352 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:40:57,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 09:40:57,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 09:40:57,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 09:40:57,353 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 6 states. [2019-02-18 09:40:57,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:40:57,677 INFO L93 Difference]: Finished difference Result 108 states and 483 transitions. [2019-02-18 09:40:57,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 09:40:57,678 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-18 09:40:57,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:40:57,679 INFO L225 Difference]: With dead ends: 108 [2019-02-18 09:40:57,679 INFO L226 Difference]: Without dead ends: 107 [2019-02-18 09:40:57,680 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-18 09:40:57,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-02-18 09:40:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2019-02-18 09:40:57,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-02-18 09:40:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-02-18 09:40:57,699 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-02-18 09:40:57,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:40:57,699 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-02-18 09:40:57,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 09:40:57,699 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-02-18 09:40:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:40:57,700 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:40:57,700 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:40:57,700 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:40:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash 945008, now seen corresponding path program 1 times [2019-02-18 09:40:57,701 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:40:57,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:57,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:57,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:40:57,702 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:40:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:57,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:57,829 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:40:57,829 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:40:57,829 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [35] [2019-02-18 09:40:57,830 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:40:57,830 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:40:57,833 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:40:57,834 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:40:57,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:40:57,834 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:40:57,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:40:57,835 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:40:57,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:40:57,846 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:40:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:40:57,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:40:57,969 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:57,970 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:40:58,012 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,013 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,014 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:40:58,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,061 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,063 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:40:58,120 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,121 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,121 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,122 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,124 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,125 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:40:58,194 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,195 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,196 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,198 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,200 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,201 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,202 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:40:58,291 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,292 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,294 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,296 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,297 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,299 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,300 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,302 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:40:58,303 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:58,342 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:58,382 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:58,421 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:58,463 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:58,504 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:58,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:40:58,558 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:40:58,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:40:58,564 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:40:58,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:40:58,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:40:58,586 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:40:58,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:40:58,599 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:58,650 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:58,690 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:58,721 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:58,746 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:58,766 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:58,783 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:58,799 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:40:58,867 INFO L267 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. [2019-02-18 09:40:58,867 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 09:40:58,921 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:58,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-02-18 09:40:58,922 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:58,984 INFO L267 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. [2019-02-18 09:40:58,985 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 09:40:59,072 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:59,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:59,118 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:59,144 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:59,165 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:59,189 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:59,217 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:59,238 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:59,259 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:40:59,259 INFO L303 Elim1Store]: Index analysis took 247 ms [2019-02-18 09:40:59,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-02-18 09:40:59,261 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:40:59,389 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:40:59,389 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-02-18 09:40:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:59,410 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:40:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:40:59,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:40:59,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 09:40:59,457 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:40:59,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:40:59,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:40:59,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-02-18 09:40:59,458 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 8 states. [2019-02-18 09:41:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:41:00,584 INFO L93 Difference]: Finished difference Result 154 states and 652 transitions. [2019-02-18 09:41:00,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 09:41:00,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 09:41:00,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:41:00,588 INFO L225 Difference]: With dead ends: 154 [2019-02-18 09:41:00,588 INFO L226 Difference]: Without dead ends: 153 [2019-02-18 09:41:00,588 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-02-18 09:41:00,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-02-18 09:41:00,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2019-02-18 09:41:00,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-02-18 09:41:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 556 transitions. [2019-02-18 09:41:00,608 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 556 transitions. Word has length 4 [2019-02-18 09:41:00,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:41:00,609 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 556 transitions. [2019-02-18 09:41:00,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 09:41:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 556 transitions. [2019-02-18 09:41:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:41:00,609 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:41:00,610 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:41:00,610 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:41:00,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:00,610 INFO L82 PathProgramCache]: Analyzing trace with hash 945504, now seen corresponding path program 1 times [2019-02-18 09:41:00,610 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:41:00,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:00,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:00,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:00,611 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:41:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:00,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:00,755 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:41:00,755 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:41:00,755 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [35] [2019-02-18 09:41:00,757 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:41:00,757 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:41:00,760 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:41:00,760 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:41:00,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:00,761 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:41:00,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:00,761 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:41:00,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:00,770 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:41:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:00,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:41:00,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:41:00,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:41:00,821 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,822 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,823 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:41:00,826 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,828 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,830 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:41:00,834 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,835 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,836 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,838 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:41:00,843 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,846 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,847 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:41:00,853 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,854 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,856 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,858 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:00,862 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:41:00,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:41:00,903 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:00,960 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:01,005 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:01,041 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:01,068 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:01,092 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:01,111 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:01,129 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:01,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:41:01,212 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,213 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:41:01,263 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,264 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,266 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,267 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:41:01,325 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,326 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,327 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,328 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,329 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,331 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:41:01,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,404 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:41:01,506 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,507 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,508 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,510 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,511 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,512 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,513 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,514 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,515 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,516 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:41:01,518 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:01,556 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:01,594 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:01,633 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:01,672 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:01,712 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:01,780 INFO L267 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. [2019-02-18 09:41:01,781 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 09:41:01,825 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,826 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-02-18 09:41:01,826 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:01,891 INFO L267 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. [2019-02-18 09:41:01,892 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 09:41:01,925 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,926 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,927 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,928 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,929 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,930 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,932 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,933 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,934 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:01,935 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-02-18 09:41:01,935 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:02,004 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:41:02,004 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-02-18 09:41:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:02,026 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:41:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:02,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:41:02,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 09:41:02,073 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:41:02,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:41:02,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:41:02,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-02-18 09:41:02,074 INFO L87 Difference]: Start difference. First operand 92 states and 556 transitions. Second operand 8 states. [2019-02-18 09:41:03,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:41:03,098 INFO L93 Difference]: Finished difference Result 148 states and 688 transitions. [2019-02-18 09:41:03,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 09:41:03,099 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 09:41:03,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:41:03,101 INFO L225 Difference]: With dead ends: 148 [2019-02-18 09:41:03,101 INFO L226 Difference]: Without dead ends: 146 [2019-02-18 09:41:03,101 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-18 09:41:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-02-18 09:41:03,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-02-18 09:41:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-02-18 09:41:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 590 transitions. [2019-02-18 09:41:03,121 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 590 transitions. Word has length 4 [2019-02-18 09:41:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:41:03,121 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 590 transitions. [2019-02-18 09:41:03,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 09:41:03,122 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 590 transitions. [2019-02-18 09:41:03,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:41:03,122 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:41:03,122 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:41:03,123 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:41:03,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:03,123 INFO L82 PathProgramCache]: Analyzing trace with hash 933972, now seen corresponding path program 1 times [2019-02-18 09:41:03,123 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:41:03,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:03,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:03,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:03,124 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:41:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:03,387 WARN L181 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2019-02-18 09:41:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:03,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:03,410 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:41:03,410 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:41:03,410 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [35] [2019-02-18 09:41:03,412 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:41:03,412 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:41:03,414 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:41:03,414 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:41:03,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:03,415 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:41:03,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:03,415 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:41:03,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:03,430 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:41:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:03,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:41:03,461 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:41:03,464 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:41:03,469 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,470 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,471 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:41:03,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,476 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,476 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:41:03,481 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,482 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,483 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,484 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:41:03,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,493 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,494 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,495 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,495 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,496 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:41:03,501 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,502 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,503 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,505 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,506 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,508 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,509 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:41:03,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:41:03,521 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:03,577 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:03,622 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:03,656 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:03,683 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:03,707 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:03,726 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:03,743 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:03,786 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:41:03,829 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,830 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:41:03,879 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,880 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,881 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,882 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:41:03,940 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,941 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,942 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,944 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,945 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,946 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:03,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:41:04,018 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,019 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,020 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,021 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,022 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,023 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,024 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,025 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:41:04,117 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,118 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,121 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,122 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,123 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,124 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,125 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,126 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,127 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:41:04,129 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:04,165 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:04,202 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:04,241 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:04,281 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:04,320 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:04,389 INFO L267 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. [2019-02-18 09:41:04,390 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 09:41:04,489 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,490 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-02-18 09:41:04,490 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:04,561 INFO L267 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. [2019-02-18 09:41:04,562 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 09:41:04,589 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,590 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,591 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,592 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,593 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,594 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,596 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,597 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:04,597 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:41:04,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 141 [2019-02-18 09:41:04,599 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:04,665 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:41:04,666 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:82 [2019-02-18 09:41:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:04,688 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:41:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:04,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:41:04,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-18 09:41:04,730 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:41:04,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:41:04,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:41:04,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-18 09:41:04,730 INFO L87 Difference]: Start difference. First operand 103 states and 590 transitions. Second operand 8 states. [2019-02-18 09:41:05,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:41:05,201 INFO L93 Difference]: Finished difference Result 145 states and 646 transitions. [2019-02-18 09:41:05,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-18 09:41:05,202 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 09:41:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:41:05,204 INFO L225 Difference]: With dead ends: 145 [2019-02-18 09:41:05,204 INFO L226 Difference]: Without dead ends: 143 [2019-02-18 09:41:05,205 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 [2019-02-18 09:41:05,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-02-18 09:41:05,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2019-02-18 09:41:05,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-02-18 09:41:05,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 599 transitions. [2019-02-18 09:41:05,223 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 599 transitions. Word has length 4 [2019-02-18 09:41:05,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:41:05,223 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 599 transitions. [2019-02-18 09:41:05,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 09:41:05,223 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 599 transitions. [2019-02-18 09:41:05,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:41:05,224 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:41:05,224 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:41:05,224 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:41:05,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:05,225 INFO L82 PathProgramCache]: Analyzing trace with hash 938128, now seen corresponding path program 1 times [2019-02-18 09:41:05,225 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:41:05,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:05,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:05,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:05,226 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:41:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:05,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:05,281 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:41:05,281 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:41:05,282 INFO L207 CegarAbsIntRunner]: [0], [14], [36], [37] [2019-02-18 09:41:05,282 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:41:05,282 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:41:05,286 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:41:05,286 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:41:05,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:05,286 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:41:05,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:05,287 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:41:05,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:05,294 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:41:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:05,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:41:05,303 INFO L478 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 27 treesize of output 30 [2019-02-18 09:41:05,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 30 treesize of output 32 [2019-02-18 09:41:05,311 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,312 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,313 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-02-18 09:41:05,318 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,319 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,320 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-02-18 09:41:05,324 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,326 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,328 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,329 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,330 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-02-18 09:41:05,335 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,336 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,339 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,342 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,344 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-02-18 09:41:05,348 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,349 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,350 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,353 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,354 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,355 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-02-18 09:41:05,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-02-18 09:41:05,370 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:05,427 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:05,467 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:05,501 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:05,528 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:05,550 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:05,568 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:05,586 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:05,622 INFO L478 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 86 treesize of output 76 [2019-02-18 09:41:05,641 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,644 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-02-18 09:41:05,688 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,689 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,692 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,693 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-02-18 09:41:05,747 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,748 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,750 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,751 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,752 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,754 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-02-18 09:41:05,827 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,828 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,829 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,830 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,831 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,832 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,834 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,836 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,837 INFO L478 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 42 treesize of output 101 [2019-02-18 09:41:05,918 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,919 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,920 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,920 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,921 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,922 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,924 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,925 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,926 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,928 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:05,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-02-18 09:41:05,929 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:05,966 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:06,002 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:06,038 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:06,075 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:06,115 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:06,181 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:41:06,181 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-02-18 09:41:06,213 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:06,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-02-18 09:41:06,215 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:06,277 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:41:06,278 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-02-18 09:41:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:06,326 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:41:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:06,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:41:06,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 09:41:06,356 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:41:06,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 09:41:06,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 09:41:06,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 09:41:06,357 INFO L87 Difference]: Start difference. First operand 104 states and 599 transitions. Second operand 6 states. [2019-02-18 09:41:06,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:41:06,835 INFO L93 Difference]: Finished difference Result 124 states and 613 transitions. [2019-02-18 09:41:06,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 09:41:06,836 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-18 09:41:06,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:41:06,838 INFO L225 Difference]: With dead ends: 124 [2019-02-18 09:41:06,838 INFO L226 Difference]: Without dead ends: 123 [2019-02-18 09:41:06,838 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-18 09:41:06,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-02-18 09:41:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2019-02-18 09:41:06,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-02-18 09:41:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-02-18 09:41:06,859 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 4 [2019-02-18 09:41:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:41:06,860 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-02-18 09:41:06,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 09:41:06,860 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-02-18 09:41:06,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:41:06,860 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:41:06,861 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:41:06,861 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:41:06,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:06,861 INFO L82 PathProgramCache]: Analyzing trace with hash 937816, now seen corresponding path program 1 times [2019-02-18 09:41:06,861 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:41:06,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:06,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:06,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:06,862 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:41:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:07,084 WARN L181 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-02-18 09:41:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:07,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:07,114 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:41:07,115 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:41:07,115 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [35] [2019-02-18 09:41:07,116 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:41:07,116 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:41:07,119 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:41:07,119 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:41:07,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:07,119 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:41:07,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:07,120 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:41:07,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:07,129 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:41:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:07,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:41:07,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:41:07,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:41:07,171 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,173 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,173 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:41:07,176 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,177 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,177 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:41:07,183 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,184 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,185 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,186 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:41:07,190 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,192 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,193 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,194 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,195 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:41:07,201 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,202 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,204 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,206 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,207 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,209 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:41:07,221 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:41:07,222 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:07,283 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:07,328 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:07,364 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:07,393 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:07,416 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:07,435 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:07,453 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:07,496 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:41:07,542 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,543 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:41:07,592 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,593 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,594 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,595 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,596 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:41:07,654 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,655 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,656 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,657 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,658 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,659 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:41:07,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,734 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,735 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,736 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,740 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,741 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:41:07,830 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,831 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,833 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,834 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,835 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,836 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,840 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:07,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:41:07,842 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:07,878 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:07,916 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:07,955 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:07,994 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:08,034 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:08,103 INFO L267 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. [2019-02-18 09:41:08,103 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 09:41:08,193 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:08,194 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-02-18 09:41:08,194 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:08,259 INFO L267 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. [2019-02-18 09:41:08,259 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-18 09:41:08,291 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:08,292 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:08,293 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:08,294 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:08,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:08,296 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:08,329 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:08,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:08,375 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:08,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-02-18 09:41:08,377 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:08,761 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:41:08,761 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-02-18 09:41:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:08,782 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:41:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:08,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:41:08,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 09:41:08,828 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:41:08,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:41:08,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:41:08,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-02-18 09:41:08,829 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 8 states. [2019-02-18 09:41:09,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:41:09,732 INFO L93 Difference]: Finished difference Result 176 states and 800 transitions. [2019-02-18 09:41:09,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 09:41:09,733 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-18 09:41:09,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:41:09,735 INFO L225 Difference]: With dead ends: 176 [2019-02-18 09:41:09,735 INFO L226 Difference]: Without dead ends: 174 [2019-02-18 09:41:09,736 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-02-18 09:41:09,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-02-18 09:41:09,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2019-02-18 09:41:09,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-02-18 09:41:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-02-18 09:41:09,757 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-02-18 09:41:09,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:41:09,757 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-02-18 09:41:09,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-18 09:41:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-02-18 09:41:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-18 09:41:09,758 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:41:09,758 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-18 09:41:09,758 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:41:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:09,758 INFO L82 PathProgramCache]: Analyzing trace with hash 953504, now seen corresponding path program 1 times [2019-02-18 09:41:09,759 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:41:09,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:09,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:09,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:09,759 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:41:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:09,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:09,821 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:41:09,822 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-18 09:41:09,822 INFO L207 CegarAbsIntRunner]: [0], [30], [36], [37] [2019-02-18 09:41:09,823 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:41:09,823 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:41:09,826 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:41:09,826 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-18 09:41:09,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:09,826 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:41:09,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:09,826 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:41:09,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:09,838 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:41:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:09,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:41:09,849 INFO L478 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 86 treesize of output 76 [2019-02-18 09:41:09,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:09,875 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:09,875 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-02-18 09:41:09,916 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:09,917 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:09,920 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:09,921 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:09,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-02-18 09:41:09,972 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:09,973 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:09,975 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:09,976 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:09,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:09,979 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:09,980 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-02-18 09:41:10,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,051 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,054 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,057 INFO L478 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 42 treesize of output 101 [2019-02-18 09:41:10,147 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,151 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,152 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,155 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,157 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-02-18 09:41:10,159 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:10,205 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:10,242 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:10,281 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:10,321 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:10,364 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:10,414 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:41:10,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-02-18 09:41:10,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-02-18 09:41:10,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-02-18 09:41:10,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-02-18 09:41:10,441 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-02-18 09:41:10,447 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-02-18 09:41:10,461 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-02-18 09:41:10,461 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:10,510 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:10,549 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:10,578 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:10,602 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:10,621 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:10,636 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:10,652 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:10,718 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:41:10,719 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-02-18 09:41:10,756 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:10,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-02-18 09:41:10,758 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:10,824 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:41:10,825 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-02-18 09:41:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:10,871 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:41:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:10,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:41:10,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-18 09:41:10,898 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:41:10,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-18 09:41:10,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-18 09:41:10,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-18 09:41:10,898 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 6 states. [2019-02-18 09:41:11,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:41:11,189 INFO L93 Difference]: Finished difference Result 135 states and 696 transitions. [2019-02-18 09:41:11,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 09:41:11,190 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-18 09:41:11,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:41:11,192 INFO L225 Difference]: With dead ends: 135 [2019-02-18 09:41:11,193 INFO L226 Difference]: Without dead ends: 134 [2019-02-18 09:41:11,193 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-18 09:41:11,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-02-18 09:41:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2019-02-18 09:41:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-02-18 09:41:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-02-18 09:41:11,216 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-02-18 09:41:11,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:41:11,216 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-02-18 09:41:11,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-18 09:41:11,216 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-02-18 09:41:11,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 09:41:11,217 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:41:11,217 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 09:41:11,217 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:41:11,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:11,218 INFO L82 PathProgramCache]: Analyzing trace with hash 29600478, now seen corresponding path program 1 times [2019-02-18 09:41:11,218 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:41:11,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:11,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:11,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:11,219 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:41:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:11,393 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2019-02-18 09:41:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:11,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:11,488 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:41:11,488 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 09:41:11,488 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [35] [2019-02-18 09:41:11,489 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:41:11,489 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:41:11,492 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:41:11,492 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 09:41:11,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:11,492 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:41:11,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:11,492 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:41:11,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:11,501 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:41:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:11,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:41:11,617 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-02-18 09:41:11,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:41:11,623 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:41:11,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,628 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,629 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:41:11,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,634 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,634 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,635 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:41:11,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,645 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:41:11,649 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,650 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,652 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,653 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,654 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,655 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:41:11,659 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,660 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,661 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,663 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,664 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,665 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,666 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:41:11,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,673 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,676 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,677 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,678 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-18 09:41:11,680 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:11,759 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:11,803 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:11,837 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:11,866 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:11,890 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:11,907 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:11,925 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:11,972 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:11,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-18 09:41:12,027 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,028 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 09:41:12,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,085 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-18 09:41:12,152 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,155 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,156 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,157 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,158 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,159 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-18 09:41:12,239 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,240 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,241 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,242 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,244 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,245 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,246 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-18 09:41:12,351 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,353 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,355 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,356 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,357 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,358 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,359 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,360 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,361 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-18 09:41:12,486 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 09:41:12,491 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,493 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,494 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,496 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,497 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,498 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,499 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,500 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,501 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,502 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-18 09:41:12,504 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:12,558 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:12,613 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:12,670 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:12,728 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:12,786 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:12,845 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:12,938 INFO L267 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. [2019-02-18 09:41:12,938 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-02-18 09:41:12,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:12,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-18 09:41:12,978 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:13,076 INFO L267 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. [2019-02-18 09:41:13,076 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-02-18 09:41:13,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,120 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,121 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,122 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,123 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,124 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,126 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,127 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,128 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,128 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:41:13,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-02-18 09:41:13,130 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:13,222 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:41:13,223 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-02-18 09:41:13,265 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,266 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,267 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,268 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,269 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,270 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,271 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,272 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,273 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,274 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,275 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,276 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,277 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,278 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,279 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:13,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 169 [2019-02-18 09:41:13,281 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:13,371 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-18 09:41:13,371 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:89 [2019-02-18 09:41:13,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:13,402 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:41:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:13,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:41:13,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-18 09:41:13,458 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:41:13,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 09:41:13,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 09:41:13,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-02-18 09:41:13,459 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 10 states. [2019-02-18 09:41:14,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:41:14,487 INFO L93 Difference]: Finished difference Result 212 states and 968 transitions. [2019-02-18 09:41:14,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-18 09:41:14,487 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 09:41:14,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:41:14,491 INFO L225 Difference]: With dead ends: 212 [2019-02-18 09:41:14,491 INFO L226 Difference]: Without dead ends: 205 [2019-02-18 09:41:14,492 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-02-18 09:41:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-02-18 09:41:14,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2019-02-18 09:41:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-02-18 09:41:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 789 transitions. [2019-02-18 09:41:14,522 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 789 transitions. Word has length 5 [2019-02-18 09:41:14,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:41:14,522 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 789 transitions. [2019-02-18 09:41:14,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 09:41:14,522 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 789 transitions. [2019-02-18 09:41:14,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 09:41:14,523 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:41:14,523 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 09:41:14,523 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:41:14,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:14,523 INFO L82 PathProgramCache]: Analyzing trace with hash 29600106, now seen corresponding path program 1 times [2019-02-18 09:41:14,523 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:41:14,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:14,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:14,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:14,524 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:41:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:14,687 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-02-18 09:41:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:14,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:14,718 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:41:14,719 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 09:41:14,719 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [35] [2019-02-18 09:41:14,720 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:41:14,720 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:41:14,722 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:41:14,723 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 09:41:14,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:14,723 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:41:14,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:14,724 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:41:14,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:14,736 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:41:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:14,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:41:14,781 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:14,782 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-18 09:41:14,836 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:14,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:14,838 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 09:41:14,898 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:14,900 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:14,902 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:14,903 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:14,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-18 09:41:14,970 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:14,973 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:14,974 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:14,976 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:14,979 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:14,982 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:14,983 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-18 09:41:15,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,069 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,074 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,076 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,079 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,082 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,085 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-18 09:41:15,188 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,191 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,193 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,195 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,198 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,200 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,202 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,204 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,207 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,209 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-18 09:41:15,328 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 09:41:15,334 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,335 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,337 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,338 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,339 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,340 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,342 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,344 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,348 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,349 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:15,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-18 09:41:15,350 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:15,411 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:15,481 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:15,550 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:15,624 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:15,694 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:15,768 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:15,846 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:41:15,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:41:15,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:41:15,855 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:41:15,859 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:41:15,862 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:41:15,865 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:41:15,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-18 09:41:15,869 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:15,939 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:15,980 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:16,011 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:16,036 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:16,056 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:16,073 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:16,087 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:16,180 INFO L267 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. [2019-02-18 09:41:16,180 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-02-18 09:41:16,219 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-18 09:41:16,221 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:16,312 INFO L267 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. [2019-02-18 09:41:16,313 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-02-18 09:41:16,346 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,346 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,348 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,349 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,350 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,351 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,353 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,354 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:41:16,355 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-02-18 09:41:16,356 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:16,447 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:41:16,448 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-02-18 09:41:16,491 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,494 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,495 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,496 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,497 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,498 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,500 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,501 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,502 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,503 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,504 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,511 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:16,512 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:41:16,513 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-02-18 09:41:16,513 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:16,603 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-18 09:41:16,603 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-02-18 09:41:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:16,635 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:41:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:16,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:41:16,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 09:41:16,694 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:41:16,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 09:41:16,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 09:41:16,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-02-18 09:41:16,695 INFO L87 Difference]: Start difference. First operand 122 states and 789 transitions. Second operand 10 states. [2019-02-18 09:41:18,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:41:18,461 INFO L93 Difference]: Finished difference Result 169 states and 850 transitions. [2019-02-18 09:41:18,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-18 09:41:18,461 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 09:41:18,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:41:18,464 INFO L225 Difference]: With dead ends: 169 [2019-02-18 09:41:18,464 INFO L226 Difference]: Without dead ends: 168 [2019-02-18 09:41:18,464 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-02-18 09:41:18,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-02-18 09:41:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2019-02-18 09:41:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-02-18 09:41:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 762 transitions. [2019-02-18 09:41:18,491 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 762 transitions. Word has length 5 [2019-02-18 09:41:18,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:41:18,491 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 762 transitions. [2019-02-18 09:41:18,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 09:41:18,492 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 762 transitions. [2019-02-18 09:41:18,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 09:41:18,492 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:41:18,492 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 09:41:18,493 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:41:18,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:18,493 INFO L82 PathProgramCache]: Analyzing trace with hash 29600602, now seen corresponding path program 1 times [2019-02-18 09:41:18,493 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:41:18,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:18,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:18,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:18,494 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:41:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:18,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:18,664 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:41:18,664 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 09:41:18,665 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [35] [2019-02-18 09:41:18,666 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:41:18,666 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:41:18,668 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:41:18,669 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 09:41:18,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:18,669 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:41:18,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:18,669 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:41:18,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:18,684 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:41:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:18,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:41:18,722 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-18 09:41:18,774 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,775 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,776 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-18 09:41:18,836 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-18 09:41:18,903 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,904 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,905 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,906 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,907 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,909 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-18 09:41:18,989 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,990 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,991 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,992 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,994 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,995 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,996 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,997 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:18,998 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-18 09:41:19,097 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,099 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,100 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,102 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,103 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,104 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,105 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,106 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,107 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-18 09:41:19,227 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-18 09:41:19,231 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,232 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,233 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,234 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,235 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,237 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,238 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,239 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,240 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,241 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,243 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,244 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:19,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-02-18 09:41:19,245 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:19,302 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:19,360 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:19,419 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:19,478 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:19,537 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:19,599 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:19,671 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:41:19,675 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:41:19,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:41:19,682 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:41:19,684 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:41:19,688 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:41:19,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:41:19,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-02-18 09:41:19,694 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:19,770 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:19,810 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:19,841 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:19,867 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:19,887 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:19,905 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:19,920 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:20,013 INFO L267 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. [2019-02-18 09:41:20,014 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-02-18 09:41:20,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-02-18 09:41:20,053 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:20,146 INFO L267 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. [2019-02-18 09:41:20,146 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-02-18 09:41:20,221 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,243 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,244 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,245 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,246 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,246 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,248 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,249 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,250 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:41:20,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-02-18 09:41:20,252 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:20,345 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-18 09:41:20,346 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-02-18 09:41:20,396 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,397 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,398 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,399 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,400 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,401 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,405 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,410 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:20,410 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:41:20,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-02-18 09:41:20,412 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:20,507 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-02-18 09:41:20,507 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-02-18 09:41:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:20,573 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:41:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:20,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:41:20,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-18 09:41:20,630 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:41:20,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 09:41:20,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 09:41:20,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-02-18 09:41:20,630 INFO L87 Difference]: Start difference. First operand 119 states and 762 transitions. Second operand 10 states. [2019-02-18 09:41:22,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:41:22,078 INFO L93 Difference]: Finished difference Result 176 states and 845 transitions. [2019-02-18 09:41:22,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-18 09:41:22,078 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 09:41:22,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:41:22,081 INFO L225 Difference]: With dead ends: 176 [2019-02-18 09:41:22,081 INFO L226 Difference]: Without dead ends: 172 [2019-02-18 09:41:22,082 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-02-18 09:41:22,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-02-18 09:41:22,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-02-18 09:41:22,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-02-18 09:41:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 788 transitions. [2019-02-18 09:41:22,108 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 788 transitions. Word has length 5 [2019-02-18 09:41:22,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:41:22,108 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 788 transitions. [2019-02-18 09:41:22,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 09:41:22,108 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 788 transitions. [2019-02-18 09:41:22,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 09:41:22,109 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:41:22,109 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 09:41:22,109 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:41:22,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:22,109 INFO L82 PathProgramCache]: Analyzing trace with hash 29588822, now seen corresponding path program 1 times [2019-02-18 09:41:22,109 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:41:22,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:22,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:22,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:22,110 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:41:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:22,282 WARN L181 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2019-02-18 09:41:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:22,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:22,326 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:41:22,327 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 09:41:22,327 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [35] [2019-02-18 09:41:22,328 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:41:22,328 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:41:22,330 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:41:22,330 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-02-18 09:41:22,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:22,330 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:41:22,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:22,330 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:41:22,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:22,340 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:41:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:22,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:41:22,373 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:41:22,416 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,417 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:41:22,466 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,467 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,469 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,470 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:41:22,524 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,525 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,526 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,527 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,528 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,529 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:41:22,599 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,600 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,601 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,602 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,603 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,604 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,606 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,607 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:41:22,696 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,697 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,699 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,700 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,701 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,703 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,705 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,706 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:22,706 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:41:22,707 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:22,748 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:22,788 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:22,831 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:22,871 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:22,913 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:22,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:41:23,000 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:41:23,012 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:41:23,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:41:23,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:41:23,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:41:23,024 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:41:23,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:41:23,035 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:23,093 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:23,134 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:23,165 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:23,190 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:23,210 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:23,227 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:23,243 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:23,312 INFO L267 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. [2019-02-18 09:41:23,312 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 09:41:23,351 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:23,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-02-18 09:41:23,408 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-02-18 09:41:23,441 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-02-18 09:41:24,933 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-02-18 09:41:24,934 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:886 [2019-02-18 09:41:27,823 WARN L181 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 451 DAG size of output: 175 [2019-02-18 09:41:27,831 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:27,832 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:27,833 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:27,833 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:27,834 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:27,835 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:27,836 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 170 [2019-02-18 09:41:27,837 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:28,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,085 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,089 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,090 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 178 [2019-02-18 09:41:28,092 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:28,294 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,297 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,299 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,300 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,301 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:41:28,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 150 [2019-02-18 09:41:28,303 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:28,472 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-02-18 09:41:28,473 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:357, output treesize:277 [2019-02-18 09:41:28,623 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,624 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,624 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,625 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,626 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,628 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,629 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,630 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,631 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,632 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,634 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,635 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,636 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,637 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 164 [2019-02-18 09:41:28,640 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:28,856 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:28,857 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 156 [2019-02-18 09:41:28,857 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:29,044 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:29,045 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:29,046 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:29,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:29,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:29,049 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:29,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:29,051 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:29,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:29,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:29,054 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:29,055 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:29,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:29,057 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:29,058 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:29,059 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:41:29,060 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 165 [2019-02-18 09:41:29,060 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:29,232 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-02-18 09:41:29,232 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:237 [2019-02-18 09:41:29,519 WARN L181 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-02-18 09:41:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:29,521 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:41:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:29,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:41:29,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-02-18 09:41:29,562 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:41:29,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-18 09:41:29,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-18 09:41:29,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-02-18 09:41:29,562 INFO L87 Difference]: Start difference. First operand 125 states and 788 transitions. Second operand 10 states. [2019-02-18 09:41:31,237 WARN L181 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 120 [2019-02-18 09:41:50,922 WARN L181 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 147 [2019-02-18 09:41:52,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-18 09:41:52,115 INFO L93 Difference]: Finished difference Result 235 states and 1248 transitions. [2019-02-18 09:41:52,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-02-18 09:41:52,115 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-18 09:41:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-18 09:41:52,118 INFO L225 Difference]: With dead ends: 235 [2019-02-18 09:41:52,118 INFO L226 Difference]: Without dead ends: 230 [2019-02-18 09:41:52,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-02-18 09:41:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-02-18 09:41:52,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 145. [2019-02-18 09:41:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-02-18 09:41:52,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 973 transitions. [2019-02-18 09:41:52,156 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 973 transitions. Word has length 5 [2019-02-18 09:41:52,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-18 09:41:52,156 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 973 transitions. [2019-02-18 09:41:52,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-18 09:41:52,156 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 973 transitions. [2019-02-18 09:41:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-18 09:41:52,157 INFO L394 BasicCegarLoop]: Found error trace [2019-02-18 09:41:52,157 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-18 09:41:52,157 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-02-18 09:41:52,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:52,158 INFO L82 PathProgramCache]: Analyzing trace with hash 29589382, now seen corresponding path program 1 times [2019-02-18 09:41:52,158 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-18 09:41:52,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:52,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:52,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-18 09:41:52,159 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-18 09:41:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:41:52,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:52,315 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-18 09:41:52,315 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-18 09:41:52,315 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [36], [37] [2019-02-18 09:41:52,316 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-18 09:41:52,316 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-18 09:41:52,318 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-18 09:41:52,319 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-18 09:41:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-18 09:41:52,319 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-18 09:41:52,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-18 09:41:52,319 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-18 09:41:52,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-18 09:41:52,327 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-18 09:41:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-18 09:41:52,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-18 09:41:52,360 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-18 09:41:52,404 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,405 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-18 09:41:52,454 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,455 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,456 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,457 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-18 09:41:52,516 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,517 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,518 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,519 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,520 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,521 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-18 09:41:52,590 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,591 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,592 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,593 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,594 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,595 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,596 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,597 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-18 09:41:52,688 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,690 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,691 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,692 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,693 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,694 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,695 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,696 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,699 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:52,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-18 09:41:52,700 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:52,737 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:52,776 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:52,817 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:52,866 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:52,907 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:52,960 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-02-18 09:41:52,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-02-18 09:41:52,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-18 09:41:52,968 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-18 09:41:52,970 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-18 09:41:52,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-18 09:41:52,977 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-18 09:41:52,989 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-02-18 09:41:52,990 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:53,044 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:53,085 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:53,117 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:53,142 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:53,162 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:53,179 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:53,195 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-18 09:41:53,264 INFO L267 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. [2019-02-18 09:41:53,264 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-18 09:41:53,484 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:53,485 INFO L303 Elim1Store]: Index analysis took 195 ms [2019-02-18 09:41:53,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-02-18 09:41:53,542 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-02-18 09:41:53,567 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-02-18 09:41:55,055 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-02-18 09:41:55,056 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:884 [2019-02-18 09:41:55,886 WARN L181 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 175 [2019-02-18 09:41:55,895 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:55,895 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:55,896 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:55,897 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:55,898 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:55,899 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:55,900 INFO L683 Elim1Store]: detected equality via solver [2019-02-18 09:41:55,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 162 [2019-02-18 09:41:55,902 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:56,151 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,152 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,154 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,155 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,156 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,157 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,158 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,159 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,160 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 174 [2019-02-18 09:41:56,161 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:56,401 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,402 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,403 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,404 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,414 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,415 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,416 INFO L701 Elim1Store]: detected not equals via solver [2019-02-18 09:41:56,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 174 [2019-02-18 09:41:56,417 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-18 09:41:56,624 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-02-18 09:41:56,625 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:357, output treesize:277 [2019-02-18 09:42:30,152 WARN L181 SmtUtils]: Spent 32.41 s on a formula simplification that was a NOOP. DAG size: 158 [2019-02-18 09:42:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:42:30,159 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-18 09:42:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-18 09:42:30,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-18 09:42:30,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-18 09:42:30,213 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-18 09:42:30,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-18 09:42:30,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-18 09:42:30,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-02-18 09:42:30,213 INFO L87 Difference]: Start difference. First operand 145 states and 973 transitions. Second operand 8 states. [2019-02-18 09:43:37,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-18 09:43:37,928 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 530194 column 7: Overflow encountered when expanding vector at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1420) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:221) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.push(DiffWrapperScript.java:93) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.push(WrapperScript.java:101) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.UndoableWrapperScript.push(UndoableWrapperScript.java:52) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$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:191) 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.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:699) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-02-18 09:43:37,931 INFO L168 Benchmark]: Toolchain (without parser) took 276412.62 ms. Allocated memory was 140.0 MB in the beginning and 241.2 MB in the end (delta: 101.2 MB). Free memory was 107.3 MB in the beginning and 124.3 MB in the end (delta: -16.9 MB). Peak memory consumption was 84.3 MB. Max. memory is 7.1 GB. [2019-02-18 09:43:37,932 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory is still 108.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-02-18 09:43:37,932 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.07 ms. Allocated memory is still 140.0 MB. Free memory was 107.3 MB in the beginning and 104.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-02-18 09:43:37,932 INFO L168 Benchmark]: Boogie Preprocessor took 35.76 ms. Allocated memory is still 140.0 MB. Free memory was 104.9 MB in the beginning and 103.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-02-18 09:43:37,932 INFO L168 Benchmark]: RCFGBuilder took 439.73 ms. Allocated memory is still 140.0 MB. Free memory was 103.6 MB in the beginning and 90.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2019-02-18 09:43:37,933 INFO L168 Benchmark]: TraceAbstraction took 275858.92 ms. Allocated memory was 140.0 MB in the beginning and 241.2 MB in the end (delta: 101.2 MB). Free memory was 90.5 MB in the beginning and 124.3 MB in the end (delta: -33.8 MB). Peak memory consumption was 67.4 MB. Max. memory is 7.1 GB. [2019-02-18 09:43:37,935 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory is still 108.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 74.07 ms. Allocated memory is still 140.0 MB. Free memory was 107.3 MB in the beginning and 104.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.76 ms. Allocated memory is still 140.0 MB. Free memory was 104.9 MB in the beginning and 103.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 439.73 ms. Allocated memory is still 140.0 MB. Free memory was 103.6 MB in the beginning and 90.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 275858.92 ms. Allocated memory was 140.0 MB in the beginning and 241.2 MB in the end (delta: 101.2 MB). Free memory was 90.5 MB in the beginning and 124.3 MB in the end (delta: -33.8 MB). Peak memory consumption was 67.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 530194 column 7: Overflow encountered when expanding vector de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 530194 column 7: Overflow encountered when expanding vector: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1420) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...