java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0ed9222-m [2019-01-11 14:23:32,430 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-11 14:23:32,432 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-11 14:23:32,444 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-11 14:23:32,444 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-11 14:23:32,448 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-11 14:23:32,450 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-11 14:23:32,452 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-11 14:23:32,455 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-11 14:23:32,461 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-11 14:23:32,462 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-11 14:23:32,504 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-01-11 14:23:32,526 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-11 14:23:32,527 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-11 14:23:32,528 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-11 14:23:32,529 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-11 14:23:32,529 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-11 14:23:32,529 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-11 14:23:32,529 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-11 14:23:32,529 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-11 14:23:32,530 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-11 14:23:32,530 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-11 14:23:32,530 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-11 14:23:32,531 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-11 14:23:32,531 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-11 14:23:32,531 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-11 14:23:32,532 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-11 14:23:32,532 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-11 14:23:32,532 INFO L133 SettingsManager]: * Use SBE=true [2019-01-11 14:23:32,532 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-11 14:23:32,533 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-11 14:23:32,535 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-11 14:23:32,535 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-11 14:23:32,535 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-11 14:23:32,535 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-11 14:23:32,535 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-11 14:23:32,536 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-11 14:23:32,536 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-11 14:23:32,536 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-11 14:23:32,536 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-11 14:23:32,536 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-11 14:23:32,536 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-11 14:23:32,537 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-11 14:23:32,537 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-11 14:23:32,537 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-11 14:23:32,537 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-11 14:23:32,537 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-11 14:23:32,538 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-11 14:23:32,538 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-11 14:23:32,538 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-11 14:23:32,539 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-11 14:23:32,539 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-11 14:23:32,596 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-11 14:23:32,609 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-11 14:23:32,613 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-11 14:23:32,615 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-11 14:23:32,615 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-11 14:23:32,616 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl [2019-01-11 14:23:32,616 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl' [2019-01-11 14:23:32,655 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-11 14:23:32,656 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-11 14:23:32,657 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-11 14:23:32,657 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-11 14:23:32,657 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-11 14:23:32,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:32" (1/1) ... [2019-01-11 14:23:32,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:32" (1/1) ... [2019-01-11 14:23:32,727 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-11 14:23:32,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-11 14:23:32,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-11 14:23:32,728 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-11 14:23:32,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:32" (1/1) ... [2019-01-11 14:23:32,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:32" (1/1) ... [2019-01-11 14:23:32,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:32" (1/1) ... [2019-01-11 14:23:32,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:32" (1/1) ... [2019-01-11 14:23:32,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:32" (1/1) ... [2019-01-11 14:23:32,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:32" (1/1) ... [2019-01-11 14:23:32,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:32" (1/1) ... [2019-01-11 14:23:32,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-11 14:23:32,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-11 14:23:32,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-11 14:23:32,775 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-11 14:23:32,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-11 14:23:32,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-11 14:23:32,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-11 14:23:33,422 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-11 14:23:33,422 INFO L286 CfgBuilder]: Removed 21 assue(true) statements. [2019-01-11 14:23:33,423 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:23:33 BoogieIcfgContainer [2019-01-11 14:23:33,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-11 14:23:33,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-11 14:23:33,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-11 14:23:33,428 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-11 14:23:33,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 02:23:32" (1/2) ... [2019-01-11 14:23:33,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e3dce4 and model type speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:23:33, skipping insertion in model container [2019-01-11 14:23:33,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:23:33" (2/2) ... [2019-01-11 14:23:33,431 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-9-unlimited.bpl [2019-01-11 14:23:33,441 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-11 14:23:33,448 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-01-11 14:23:33,461 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-01-11 14:23:33,491 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-11 14:23:33,491 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-11 14:23:33,492 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-11 14:23:33,492 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-11 14:23:33,492 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-11 14:23:33,492 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-11 14:23:33,493 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-11 14:23:33,493 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-11 14:23:33,506 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-01-11 14:23:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-11 14:23:33,512 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:33,513 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-11 14:23:33,515 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:33,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:33,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1000, now seen corresponding path program 1 times [2019-01-11 14:23:33,523 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:33,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:33,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:33,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:33,566 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:33,743 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 14:23:33,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 14:23:33,743 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:23:33,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 14:23:33,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 14:23:33,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 14:23:33,765 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-01-11 14:23:34,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:23:34,024 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2019-01-11 14:23:34,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 14:23:34,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-11 14:23:34,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:23:34,040 INFO L225 Difference]: With dead ends: 41 [2019-01-11 14:23:34,040 INFO L226 Difference]: Without dead ends: 36 [2019-01-11 14:23:34,044 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 14:23:34,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-11 14:23:34,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 20. [2019-01-11 14:23:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-01-11 14:23:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 37 transitions. [2019-01-11 14:23:34,091 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 37 transitions. Word has length 2 [2019-01-11 14:23:34,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:23:34,092 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 37 transitions. [2019-01-11 14:23:34,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 14:23:34,093 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 37 transitions. [2019-01-11 14:23:34,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:23:34,093 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:34,093 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:23:34,094 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:34,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:34,094 INFO L82 PathProgramCache]: Analyzing trace with hash 30388, now seen corresponding path program 1 times [2019-01-11 14:23:34,095 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:34,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:34,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:34,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:34,096 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:34,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:34,295 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:23:34,296 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:23:34,298 INFO L207 CegarAbsIntRunner]: [0], [18], [39] [2019-01-11 14:23:34,336 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:23:34,336 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:23:34,407 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:23:34,408 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 14:23:34,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:34,414 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:23:34,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:34,415 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:23:34,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:34,432 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:23:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:34,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:23:34,693 WARN L181 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-01-11 14:23:34,713 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-11 14:23:34,731 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-11 14:23:34,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,756 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-11 14:23:34,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-11 14:23:34,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:34,937 INFO L303 Elim1Store]: Index analysis took 115 ms [2019-01-11 14:23:34,939 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-11 14:23:34,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,011 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-11 14:23:35,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-11 14:23:35,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:35,199 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-11 14:23:35,276 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-11 14:23:35,282 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:35,657 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:36,022 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:36,101 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:36,148 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:36,187 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:36,251 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:36,279 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:36,319 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:36,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:36,449 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 14:23:36,604 WARN L181 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-01-11 14:23:36,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:36,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:36,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 14:23:36,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:36,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:36,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:36,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:36,740 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 14:23:36,850 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-11 14:23:36,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:36,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:36,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:36,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:36,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:36,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:36,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:23:37,029 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-11 14:23:37,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,050 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 14:23:37,169 WARN L181 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 14:23:37,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 14:23:37,465 WARN L181 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:23:37,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:37,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 14:23:37,523 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:37,586 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:37,645 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:37,707 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:37,832 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:37,911 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:37,974 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:38,081 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:23:38,082 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 14:23:38,294 WARN L181 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-01-11 14:23:38,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:38,340 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 153 [2019-01-11 14:23:38,341 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:38,550 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:23:38,550 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 14:23:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:38,581 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:23:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:38,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:23:38,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:23:38,621 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:23:38,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:23:38,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:23:38,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:23:38,623 INFO L87 Difference]: Start difference. First operand 20 states and 37 transitions. Second operand 6 states. [2019-01-11 14:23:50,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:23:50,667 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2019-01-11 14:23:50,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:23:50,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 14:23:50,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:23:50,671 INFO L225 Difference]: With dead ends: 71 [2019-01-11 14:23:50,671 INFO L226 Difference]: Without dead ends: 69 [2019-01-11 14:23:50,672 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:23:50,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-01-11 14:23:50,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 24. [2019-01-11 14:23:50,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-01-11 14:23:50,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 52 transitions. [2019-01-11 14:23:50,679 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 52 transitions. Word has length 3 [2019-01-11 14:23:50,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:23:50,680 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 52 transitions. [2019-01-11 14:23:50,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:23:50,680 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 52 transitions. [2019-01-11 14:23:50,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:23:50,680 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:23:50,680 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:23:50,681 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:23:50,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:50,681 INFO L82 PathProgramCache]: Analyzing trace with hash 30884, now seen corresponding path program 1 times [2019-01-11 14:23:50,681 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:23:50,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:50,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:50,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:23:50,683 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:23:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:50,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:50,806 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:23:50,806 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:23:50,806 INFO L207 CegarAbsIntRunner]: [0], [34], [39] [2019-01-11 14:23:50,808 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:23:50,808 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:23:50,818 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:23:50,818 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 14:23:50,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:23:50,819 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:23:50,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:23:50,819 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:23:50,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:23:50,829 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:23:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:23:50,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:23:50,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:50,875 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 14:23:50,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:50,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:50,937 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 14:23:51,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,006 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 14:23:51,140 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-11 14:23:51,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:23:51,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 14:23:51,421 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 14:23:51,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 14:23:51,571 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:23:51,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:51,698 INFO L303 Elim1Store]: Index analysis took 124 ms [2019-01-11 14:23:51,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 14:23:51,701 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:51,760 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:51,823 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:51,888 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:51,964 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,038 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,115 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-11 14:23:52,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-11 14:23:52,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-11 14:23:52,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-11 14:23:52,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-11 14:23:52,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-11 14:23:52,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-11 14:23:52,285 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-11 14:23:52,463 INFO L303 Elim1Store]: Index analysis took 174 ms [2019-01-11 14:23:52,465 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-11 14:23:52,467 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,683 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,746 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,794 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,833 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,863 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,888 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,910 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:52,935 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:23:53,041 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:23:53,042 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 14:23:53,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:23:53,101 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-11 14:23:53,102 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:23:53,350 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:23:53,351 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 14:23:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:53,390 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:23:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:23:53,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:23:53,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:23:53,422 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:23:53,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:23:53,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:23:53,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:23:53,423 INFO L87 Difference]: Start difference. First operand 24 states and 52 transitions. Second operand 6 states. [2019-01-11 14:24:04,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:24:04,471 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-01-11 14:24:04,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-11 14:24:04,471 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 14:24:04,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:24:04,474 INFO L225 Difference]: With dead ends: 54 [2019-01-11 14:24:04,474 INFO L226 Difference]: Without dead ends: 52 [2019-01-11 14:24:04,475 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:24:04,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-11 14:24:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 29. [2019-01-11 14:24:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-11 14:24:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 69 transitions. [2019-01-11 14:24:04,482 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 69 transitions. Word has length 3 [2019-01-11 14:24:04,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:24:04,482 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 69 transitions. [2019-01-11 14:24:04,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:24:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 69 transitions. [2019-01-11 14:24:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:24:04,483 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:24:04,483 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:24:04,483 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:24:04,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:04,484 INFO L82 PathProgramCache]: Analyzing trace with hash 30946, now seen corresponding path program 1 times [2019-01-11 14:24:04,484 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:24:04,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:04,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:04,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:24:04,485 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:24:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:04,652 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2019-01-11 14:24:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:24:04,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:04,663 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:24:04,663 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:24:04,664 INFO L207 CegarAbsIntRunner]: [0], [36], [39] [2019-01-11 14:24:04,665 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:24:04,665 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:24:04,672 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:24:04,673 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 14:24:04,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:24:04,673 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:24:04,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:24:04,673 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:24:04,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:24:04,683 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:24:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:24:04,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:24:04,756 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-11 14:24:04,760 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-11 14:24:04,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-11 14:24:04,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-11 14:24:04,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-11 14:24:04,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,859 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-11 14:24:04,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-11 14:24:04,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:04,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-11 14:24:05,071 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-11 14:24:05,072 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:05,178 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:05,242 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:05,296 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:05,336 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:05,367 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:05,394 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:05,417 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:05,437 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:05,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,494 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 14:24:05,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 14:24:05,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,620 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 [2019-01-11 14:24:05,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,714 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:24:05,816 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-11 14:24:05,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,829 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 14:24:05,934 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 14:24:05,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:05,954 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 14:24:06,090 WARN L181 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:24:06,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:06,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:06,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:06,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:06,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:06,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:06,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:06,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:06,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:06,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:06,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:06,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:06,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 14:24:06,111 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 14:24:06,177 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:06,239 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:06,300 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:06,362 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:06,423 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:06,511 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:24:06,616 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:24:06,616 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 14:24:08,361 WARN L181 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 88 [2019-01-11 14:24:08,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:24:08,513 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 29 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 16 case distinctions, treesize of input 56 treesize of output 190 [2019-01-11 14:24:08,515 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-01-11 14:24:08,693 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 256 xjuncts. [2019-01-11 14:24:12,537 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-1 vars, End of recursive call: 64 dim-0 vars, and 9 xjuncts. [2019-01-11 14:24:12,538 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:168, output treesize:1383 [2019-01-11 14:25:50,934 WARN L181 SmtUtils]: Spent 1.59 m on a formula simplification that was a NOOP. DAG size: 732 [2019-01-11 14:25:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:50,938 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:51,035 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-11 14:25:51,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-11 14:25:51,036 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:25:51,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-11 14:25:51,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-11 14:25:51,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-11 14:25:51,037 INFO L87 Difference]: Start difference. First operand 29 states and 69 transitions. Second operand 4 states. [2019-01-11 14:25:51,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:25:51,118 INFO L93 Difference]: Finished difference Result 31 states and 80 transitions. [2019-01-11 14:25:51,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 14:25:51,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-11 14:25:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:25:51,120 INFO L225 Difference]: With dead ends: 31 [2019-01-11 14:25:51,120 INFO L226 Difference]: Without dead ends: 30 [2019-01-11 14:25:51,121 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 100.3s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-11 14:25:51,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-11 14:25:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-01-11 14:25:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-11 14:25:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 79 transitions. [2019-01-11 14:25:51,127 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 79 transitions. Word has length 3 [2019-01-11 14:25:51,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:25:51,128 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 79 transitions. [2019-01-11 14:25:51,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-11 14:25:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 79 transitions. [2019-01-11 14:25:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:25:51,128 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:25:51,129 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:25:51,129 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:25:51,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:51,129 INFO L82 PathProgramCache]: Analyzing trace with hash 31072, now seen corresponding path program 1 times [2019-01-11 14:25:51,129 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:25:51,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:51,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:51,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:51,131 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:25:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:51,206 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 14:25:51,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 14:25:51,206 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 14:25:51,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 14:25:51,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 14:25:51,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 14:25:51,207 INFO L87 Difference]: Start difference. First operand 30 states and 79 transitions. Second operand 3 states. [2019-01-11 14:25:51,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:25:51,300 INFO L93 Difference]: Finished difference Result 37 states and 80 transitions. [2019-01-11 14:25:51,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 14:25:51,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-11 14:25:51,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:25:51,301 INFO L225 Difference]: With dead ends: 37 [2019-01-11 14:25:51,302 INFO L226 Difference]: Without dead ends: 36 [2019-01-11 14:25:51,302 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 14:25:51,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-11 14:25:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-01-11 14:25:51,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-11 14:25:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 78 transitions. [2019-01-11 14:25:51,309 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 78 transitions. Word has length 3 [2019-01-11 14:25:51,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:25:51,309 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 78 transitions. [2019-01-11 14:25:51,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 14:25:51,310 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 78 transitions. [2019-01-11 14:25:51,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:25:51,310 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:25:51,310 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:25:51,310 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:25:51,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:51,311 INFO L82 PathProgramCache]: Analyzing trace with hash 30140, now seen corresponding path program 1 times [2019-01-11 14:25:51,311 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:25:51,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:51,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:51,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:25:51,312 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:25:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:51,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:51,408 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:25:51,408 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:25:51,408 INFO L207 CegarAbsIntRunner]: [0], [10], [39] [2019-01-11 14:25:51,409 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:25:51,410 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:25:51,417 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:25:51,417 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 14:25:51,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:25:51,418 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:25:51,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:25:51,418 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:25:51,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:25:51,429 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:25:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:25:51,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:25:51,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-11 14:25:51,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-11 14:25:51,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,625 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-11 14:25:51,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-11 14:25:51,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-11 14:25:51,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,685 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-11 14:25:51,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,701 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-11 14:25:51,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:51,752 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-11 14:25:51,782 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-11 14:25:51,783 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:51,977 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:52,040 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:52,087 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:52,123 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:52,153 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:52,178 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:52,202 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:52,222 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:52,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 14:25:52,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 14:25:52,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,400 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 14:25:52,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,475 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:25:52,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 14:25:52,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,697 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 14:25:52,819 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:25:52,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:52,837 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 14:25:52,838 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:52,908 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:52,965 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:53,023 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:53,081 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:53,142 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:53,202 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:25:53,310 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:53,310 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 14:25:53,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:25:53,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-11 14:25:53,360 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:25:53,453 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:25:53,454 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 14:25:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:53,473 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:25:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:25:53,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:25:53,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:25:53,504 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:25:53,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:25:53,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:25:53,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:25:53,505 INFO L87 Difference]: Start difference. First operand 30 states and 78 transitions. Second operand 6 states. [2019-01-11 14:26:05,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:26:05,467 INFO L93 Difference]: Finished difference Result 71 states and 131 transitions. [2019-01-11 14:26:05,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:26:05,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 14:26:05,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:26:05,469 INFO L225 Difference]: With dead ends: 71 [2019-01-11 14:26:05,469 INFO L226 Difference]: Without dead ends: 70 [2019-01-11 14:26:05,470 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:26:05,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-11 14:26:05,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 31. [2019-01-11 14:26:05,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-11 14:26:05,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 88 transitions. [2019-01-11 14:26:05,478 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 88 transitions. Word has length 3 [2019-01-11 14:26:05,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:26:05,478 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 88 transitions. [2019-01-11 14:26:05,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:26:05,479 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 88 transitions. [2019-01-11 14:26:05,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 14:26:05,479 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:26:05,479 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 14:26:05,480 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:26:05,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:26:05,480 INFO L82 PathProgramCache]: Analyzing trace with hash 30636, now seen corresponding path program 1 times [2019-01-11 14:26:05,480 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:26:05,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:26:05,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:26:05,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:26:05,481 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:26:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:26:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:05,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:26:05,539 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:26:05,539 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 14:26:05,539 INFO L207 CegarAbsIntRunner]: [0], [26], [39] [2019-01-11 14:26:05,541 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:26:05,541 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:26:05,548 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:26:05,548 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 94 root evaluator evaluations with a maximum evaluation depth of 2. Performed 94 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-11 14:26:05,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:26:05,548 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:26:05,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:26:05,549 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:26:05,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:26:05,560 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:26:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:26:05,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:26:05,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,609 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 14:26:05,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,666 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 14:26:05,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 14:26:05,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:26:05,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:05,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 14:26:06,044 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-11 14:26:06,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,063 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 14:26:06,188 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:26:06,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:06,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 14:26:06,236 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:06,293 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:06,352 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:06,413 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:06,474 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:06,536 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:06,601 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:06,675 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-11 14:26:06,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-11 14:26:06,684 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-11 14:26:06,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-11 14:26:06,696 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-11 14:26:06,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-11 14:26:06,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-11 14:26:06,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-11 14:26:06,743 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-11 14:26:06,744 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:06,818 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:06,878 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:06,924 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:06,960 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:06,988 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:07,010 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:07,030 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:07,047 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:07,147 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:26:07,147 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-11 14:26:07,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:07,279 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-11 14:26:07,280 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:07,387 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:26:07,388 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-11 14:26:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:07,408 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:26:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:07,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:26:07,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 14:26:07,438 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:26:07,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 14:26:07,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 14:26:07,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 14:26:07,439 INFO L87 Difference]: Start difference. First operand 31 states and 88 transitions. Second operand 6 states. [2019-01-11 14:26:19,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:26:19,414 INFO L93 Difference]: Finished difference Result 72 states and 141 transitions. [2019-01-11 14:26:19,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 14:26:19,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 14:26:19,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:26:19,416 INFO L225 Difference]: With dead ends: 72 [2019-01-11 14:26:19,416 INFO L226 Difference]: Without dead ends: 70 [2019-01-11 14:26:19,417 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 14:26:19,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-11 14:26:19,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 32. [2019-01-11 14:26:19,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-11 14:26:19,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 97 transitions. [2019-01-11 14:26:19,426 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 97 transitions. Word has length 3 [2019-01-11 14:26:19,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:26:19,427 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 97 transitions. [2019-01-11 14:26:19,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 14:26:19,427 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 97 transitions. [2019-01-11 14:26:19,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:26:19,427 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:26:19,427 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:26:19,428 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:26:19,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:26:19,428 INFO L82 PathProgramCache]: Analyzing trace with hash 941912, now seen corresponding path program 1 times [2019-01-11 14:26:19,428 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:26:19,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:26:19,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:26:19,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:26:19,429 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:26:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:26:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:19,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:26:19,564 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:26:19,564 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:26:19,564 INFO L207 CegarAbsIntRunner]: [0], [18], [34], [39] [2019-01-11 14:26:19,566 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:26:19,566 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:26:19,571 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:26:19,571 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 96 root evaluator evaluations with a maximum evaluation depth of 2. Performed 96 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:26:19,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:26:19,572 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:26:19,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:26:19,572 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:26:19,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:26:19,580 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:26:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:26:19,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:26:19,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 14:26:19,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 14:26:19,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 14:26:19,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:26:19,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:19,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 14:26:20,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 14:26:20,241 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:26:20,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:20,335 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 14:26:20,338 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:20,419 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:20,505 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:20,596 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:20,693 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:20,795 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:20,901 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:21,024 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-11 14:26:21,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-11 14:26:21,035 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-11 14:26:21,043 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-11 14:26:21,047 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-11 14:26:21,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-11 14:26:21,057 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-11 14:26:21,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-11 14:26:21,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-11 14:26:21,081 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:21,159 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:21,219 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:21,267 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:21,304 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:21,334 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:21,358 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:21,378 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:21,398 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:21,502 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:26:21,502 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:150, output treesize:158 [2019-01-11 14:26:21,631 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-01-11 14:26:21,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:21,676 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 153 [2019-01-11 14:26:21,677 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:22,120 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:26:22,121 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-11 14:26:22,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:22,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:22,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:22,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:22,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:22,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:22,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:22,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:22,179 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:26:22,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 168 [2019-01-11 14:26:22,181 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:22,276 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-11 14:26:22,276 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-11 14:26:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:22,302 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 14:26:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:22,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 14:26:22,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 14:26:22,345 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 14:26:22,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 14:26:22,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 14:26:22,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-11 14:26:22,346 INFO L87 Difference]: Start difference. First operand 32 states and 97 transitions. Second operand 8 states. [2019-01-11 14:26:25,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 14:26:25,860 INFO L93 Difference]: Finished difference Result 89 states and 175 transitions. [2019-01-11 14:26:25,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-11 14:26:25,860 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 14:26:25,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 14:26:25,862 INFO L225 Difference]: With dead ends: 89 [2019-01-11 14:26:25,862 INFO L226 Difference]: Without dead ends: 87 [2019-01-11 14:26:25,862 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-01-11 14:26:25,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-01-11 14:26:25,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 37. [2019-01-11 14:26:25,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-01-11 14:26:25,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 107 transitions. [2019-01-11 14:26:25,871 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 107 transitions. Word has length 4 [2019-01-11 14:26:25,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 14:26:25,871 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 107 transitions. [2019-01-11 14:26:25,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 14:26:25,872 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 107 transitions. [2019-01-11 14:26:25,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 14:26:25,872 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 14:26:25,872 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 14:26:25,873 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT]=== [2019-01-11 14:26:25,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:26:25,873 INFO L82 PathProgramCache]: Analyzing trace with hash 941974, now seen corresponding path program 1 times [2019-01-11 14:26:25,873 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 14:26:25,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:26:25,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:26:25,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 14:26:25,877 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 14:26:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:26:26,335 WARN L181 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 13 [2019-01-11 14:26:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 14:26:26,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:26:26,358 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 14:26:26,358 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 14:26:26,358 INFO L207 CegarAbsIntRunner]: [0], [18], [36], [39] [2019-01-11 14:26:26,359 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-11 14:26:26,359 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 14:26:26,365 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 14:26:26,365 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 96 root evaluator evaluations with a maximum evaluation depth of 2. Performed 96 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 14:26:26,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 14:26:26,366 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 14:26:26,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 14:26:26,366 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:26:26,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 14:26:26,374 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 14:26:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 14:26:26,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 14:26:26,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2019-01-11 14:26:26,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-11 14:26:26,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,487 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-11 14:26:26,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,500 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-11 14:26:26,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,577 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-11 14:26:26,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-11 14:26:26,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-11 14:26:26,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:26,625 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-11 14:26:26,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 158 [2019-01-11 14:26:26,642 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:26,726 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:26,792 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:26,844 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:26,885 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:26,917 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:26,946 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:26,968 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:26,990 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:27,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,048 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-11 14:26:27,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-11 14:26:27,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-11 14:26:27,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-11 14:26:27,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-11 14:26:27,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-11 14:26:27,598 WARN L181 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-11 14:26:27,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:27,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-11 14:26:27,619 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:27,689 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:27,903 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:27,961 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:28,020 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:28,080 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:28,141 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 14:26:28,479 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-11 14:26:28,480 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:150, output treesize:158 [2019-01-11 14:26:28,716 WARN L181 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-01-11 14:26:28,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:28,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 29 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 162 [2019-01-11 14:26:28,747 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-11 14:26:29,084 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 13 dim-0 vars, and 2 xjuncts. [2019-01-11 14:26:29,084 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:168, output treesize:258 [2019-01-11 14:26:29,345 WARN L181 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-01-11 14:26:29,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,413 INFO L683 Elim1Store]: detected equality via solver [2019-01-11 14:26:29,414 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 211 [2019-01-11 14:26:29,415 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 14:26:29,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 14:26:29,801 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 32 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 142 treesize of output 204 [2019-01-11 14:26:29,802 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-11 14:26:29,862 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 128 xjuncts. [2019-01-11 14:26:32,733 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 2 dim-1 vars, End of recursive call: 64 dim-0 vars, and 9 xjuncts. [2019-01-11 14:26:32,734 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 17 variables, input treesize:280, output treesize:1007 [2019-01-11 14:26:35,974 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-11 14:26:35,976 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:626) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:152) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:286) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:215) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 45 more [2019-01-11 14:26:35,981 INFO L168 Benchmark]: Toolchain (without parser) took 183325.14 ms. Allocated memory was 141.6 MB in the beginning and 274.7 MB in the end (delta: 133.2 MB). Free memory was 109.1 MB in the beginning and 113.0 MB in the end (delta: -3.9 MB). Peak memory consumption was 129.3 MB. Max. memory is 7.1 GB. [2019-01-11 14:26:35,981 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory is still 110.4 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-11 14:26:35,982 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.33 ms. Allocated memory is still 141.6 MB. Free memory was 108.9 MB in the beginning and 106.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-01-11 14:26:35,982 INFO L168 Benchmark]: Boogie Preprocessor took 43.35 ms. Allocated memory is still 141.6 MB. Free memory was 106.5 MB in the beginning and 105.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-11 14:26:35,982 INFO L168 Benchmark]: RCFGBuilder took 652.52 ms. Allocated memory is still 141.6 MB. Free memory was 105.2 MB in the beginning and 91.5 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2019-01-11 14:26:35,983 INFO L168 Benchmark]: TraceAbstraction took 182554.92 ms. Allocated memory was 141.6 MB in the beginning and 274.7 MB in the end (delta: 133.2 MB). Free memory was 91.3 MB in the beginning and 113.0 MB in the end (delta: -21.7 MB). Peak memory consumption was 111.5 MB. Max. memory is 7.1 GB. [2019-01-11 14:26:35,985 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 0.21 ms. Allocated memory is still 141.6 MB. Free memory is still 110.4 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 70.33 ms. Allocated memory is still 141.6 MB. Free memory was 108.9 MB in the beginning and 106.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.35 ms. Allocated memory is still 141.6 MB. Free memory was 106.5 MB in the beginning and 105.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 652.52 ms. Allocated memory is still 141.6 MB. Free memory was 105.2 MB in the beginning and 91.5 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 182554.92 ms. Allocated memory was 141.6 MB in the beginning and 274.7 MB in the end (delta: 133.2 MB). Free memory was 91.3 MB in the beginning and 113.0 MB in the end (delta: -21.7 MB). Peak memory consumption was 111.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...