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-b7bd044-m [2019-01-20 10:10:31,969 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-20 10:10:31,971 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-20 10:10:31,985 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-20 10:10:31,986 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-20 10:10:31,987 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-20 10:10:31,988 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-20 10:10:31,990 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-20 10:10:31,991 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-20 10:10:31,992 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-20 10:10:31,993 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-20 10:10:32,034 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 [2019-01-20 10:10:32,057 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-20 10:10:32,057 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-20 10:10:32,058 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-20 10:10:32,059 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-20 10:10:32,059 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-20 10:10:32,059 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-20 10:10:32,059 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-20 10:10:32,059 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-20 10:10:32,060 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-20 10:10:32,060 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-20 10:10:32,060 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-20 10:10:32,060 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-20 10:10:32,060 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-20 10:10:32,061 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-20 10:10:32,061 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-20 10:10:32,062 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-20 10:10:32,062 INFO L133 SettingsManager]: * Use SBE=true [2019-01-20 10:10:32,062 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-20 10:10:32,062 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-20 10:10:32,062 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-20 10:10:32,063 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-20 10:10:32,064 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-20 10:10:32,065 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-20 10:10:32,065 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-20 10:10:32,065 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-20 10:10:32,065 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-20 10:10:32,065 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-20 10:10:32,066 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-20 10:10:32,066 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-20 10:10:32,066 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-20 10:10:32,066 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-20 10:10:32,066 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-20 10:10:32,067 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-20 10:10:32,067 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-20 10:10:32,067 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-20 10:10:32,067 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-20 10:10:32,067 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-20 10:10:32,068 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-20 10:10:32,068 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-20 10:10:32,068 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-20 10:10:32,107 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-20 10:10:32,119 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-20 10:10:32,122 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-20 10:10:32,124 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-20 10:10:32,124 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-20 10:10:32,125 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl [2019-01-20 10:10:32,125 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-unlimited.bpl' [2019-01-20 10:10:32,157 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-20 10:10:32,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-20 10:10:32,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-20 10:10:32,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-20 10:10:32,160 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-20 10:10:32,176 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 20.01 10:10:32" (1/1) ... [2019-01-20 10:10:32,188 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 20.01 10:10:32" (1/1) ... [2019-01-20 10:10:32,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-20 10:10:32,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-20 10:10:32,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-20 10:10:32,216 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-20 10:10:32,227 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 20.01 10:10:32" (1/1) ... [2019-01-20 10:10:32,227 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 20.01 10:10:32" (1/1) ... [2019-01-20 10:10:32,230 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 20.01 10:10:32" (1/1) ... [2019-01-20 10:10:32,230 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 20.01 10:10:32" (1/1) ... [2019-01-20 10:10:32,234 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 20.01 10:10:32" (1/1) ... [2019-01-20 10:10:32,238 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 20.01 10:10:32" (1/1) ... [2019-01-20 10:10:32,239 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 20.01 10:10:32" (1/1) ... [2019-01-20 10:10:32,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-20 10:10:32,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-20 10:10:32,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-20 10:10:32,242 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-20 10:10:32,243 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 20.01 10:10:32" (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:2024 -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:2024 -smt2 -in -t:2000 [2019-01-20 10:10:32,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-20 10:10:32,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-20 10:10:32,722 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-20 10:10:32,722 INFO L286 CfgBuilder]: Removed 21 assue(true) statements. [2019-01-20 10:10:32,723 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:10:32 BoogieIcfgContainer [2019-01-20 10:10:32,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-20 10:10:32,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-20 10:10:32,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-20 10:10:32,728 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-20 10:10:32,728 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 20.01 10:10:32" (1/2) ... [2019-01-20 10:10:32,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b667819 and model type speedup-poc-dd-9-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:10:32, skipping insertion in model container [2019-01-20 10:10:32,729 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 20.01 10:10:32" (2/2) ... [2019-01-20 10:10:32,731 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-9-unlimited.bpl [2019-01-20 10:10:32,741 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-20 10:10:32,752 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-01-20 10:10:32,771 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-01-20 10:10:32,816 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-20 10:10:32,817 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-20 10:10:32,817 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-20 10:10:32,817 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-20 10:10:32,817 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-20 10:10:32,817 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-20 10:10:32,818 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-20 10:10:32,819 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-20 10:10:32,837 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-01-20 10:10:32,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-20 10:10:32,850 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:10:32,850 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-20 10:10:32,853 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:10:32,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:32,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1000, now seen corresponding path program 1 times [2019-01-20 10:10:32,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:10:32,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:32,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:32,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:32,908 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:10:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:33,113 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-20 10:10:33,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-20 10:10:33,114 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:10:33,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-20 10:10:33,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-20 10:10:33,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-20 10:10:33,139 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-01-20 10:10:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:10:33,405 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2019-01-20 10:10:33,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-20 10:10:33,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-20 10:10:33,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:10:33,439 INFO L225 Difference]: With dead ends: 41 [2019-01-20 10:10:33,439 INFO L226 Difference]: Without dead ends: 36 [2019-01-20 10:10:33,444 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 [2019-01-20 10:10:33,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-20 10:10:33,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 20. [2019-01-20 10:10:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-01-20 10:10:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 37 transitions. [2019-01-20 10:10:33,481 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 37 transitions. Word has length 2 [2019-01-20 10:10:33,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:10:33,482 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 37 transitions. [2019-01-20 10:10:33,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-20 10:10:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 37 transitions. [2019-01-20 10:10:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:10:33,483 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:10:33,483 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:10:33,484 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:10:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:33,484 INFO L82 PathProgramCache]: Analyzing trace with hash 30388, now seen corresponding path program 1 times [2019-01-20 10:10:33,484 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:10:33,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:33,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:33,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:33,486 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:10:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:33,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:33,764 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:10:33,765 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:10:33,767 INFO L207 CegarAbsIntRunner]: [0], [18], [39] [2019-01-20 10:10:33,807 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:10:33,807 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:10:33,887 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:10:33,888 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. [2019-01-20 10:10:33,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:33,894 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:10:33,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:33,894 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 [2019-01-20 10:10:33,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:33,907 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:10:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:33,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:10:34,151 WARN L181 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-01-20 10:10:34,178 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 [2019-01-20 10:10:34,196 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 [2019-01-20 10:10:34,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,218 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 [2019-01-20 10:10:34,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,249 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 [2019-01-20 10:10:34,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,359 INFO L303 Elim1Store]: Index analysis took 105 ms [2019-01-20 10:10:34,361 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 [2019-01-20 10:10:34,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,477 INFO L303 Elim1Store]: Index analysis took 109 ms [2019-01-20 10:10:34,479 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 [2019-01-20 10:10:34,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,552 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 [2019-01-20 10:10:34,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,714 INFO L303 Elim1Store]: Index analysis took 150 ms [2019-01-20 10:10:34,717 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 [2019-01-20 10:10:34,780 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 [2019-01-20 10:10:34,785 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:35,134 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:35,507 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:35,598 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:35,668 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:35,725 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:35,777 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:35,808 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:35,852 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:35,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:35,983 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 [2019-01-20 10:10:36,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,068 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 [2019-01-20 10:10:36,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,173 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 [2019-01-20 10:10:36,349 WARN L181 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-20 10:10:36,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,415 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 [2019-01-20 10:10:36,528 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-20 10:10:36,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,563 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 [2019-01-20 10:10:36,695 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-20 10:10:36,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:36,729 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 [2019-01-20 10:10:36,955 WARN L181 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:10:36,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,060 INFO L303 Elim1Store]: Index analysis took 101 ms [2019-01-20 10:10:37,063 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 [2019-01-20 10:10:37,066 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:37,186 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:37,256 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:37,335 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:37,458 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:37,540 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:37,606 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:37,716 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. [2019-01-20 10:10:37,716 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-20 10:10:37,870 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-01-20 10:10:37,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:37,898 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 [2019-01-20 10:10:37,900 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:38,210 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. [2019-01-20 10:10:38,211 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-20 10:10:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:38,236 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:10:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:38,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:10:38,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:10:38,269 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:10:38,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:10:38,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:10:38,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:10:38,271 INFO L87 Difference]: Start difference. First operand 20 states and 37 transitions. Second operand 6 states. [2019-01-20 10:10:50,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:10:50,069 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2019-01-20 10:10:50,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:10:50,071 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-20 10:10:50,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:10:50,073 INFO L225 Difference]: With dead ends: 71 [2019-01-20 10:10:50,073 INFO L226 Difference]: Without dead ends: 69 [2019-01-20 10:10:50,074 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-20 10:10:50,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-01-20 10:10:50,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 24. [2019-01-20 10:10:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-01-20 10:10:50,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 52 transitions. [2019-01-20 10:10:50,082 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 52 transitions. Word has length 3 [2019-01-20 10:10:50,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:10:50,082 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 52 transitions. [2019-01-20 10:10:50,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:10:50,082 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 52 transitions. [2019-01-20 10:10:50,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:10:50,083 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:10:50,083 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:10:50,084 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:10:50,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:50,084 INFO L82 PathProgramCache]: Analyzing trace with hash 30884, now seen corresponding path program 1 times [2019-01-20 10:10:50,084 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:10:50,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:50,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:50,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:50,085 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:10:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:50,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:50,199 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:10:50,199 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:10:50,199 INFO L207 CegarAbsIntRunner]: [0], [34], [39] [2019-01-20 10:10:50,200 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:10:50,201 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:10:50,210 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:10:50,210 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. [2019-01-20 10:10:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:50,211 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:10:50,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:50,211 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 [2019-01-20 10:10:50,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:50,221 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:10:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:50,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:10:50,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:50,275 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 [2019-01-20 10:10:50,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:50,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:50,400 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 [2019-01-20 10:10:50,643 WARN L181 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2019-01-20 10:10:50,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:50,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:50,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:50,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:50,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-20 10:10:50,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:50,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:50,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:50,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:50,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:50,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:50,747 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 [2019-01-20 10:10:50,991 WARN L181 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-20 10:10:50,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:50,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:50,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:50,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,008 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 [2019-01-20 10:10:51,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,140 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 [2019-01-20 10:10:51,294 WARN L181 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:10:51,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:51,316 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 [2019-01-20 10:10:51,317 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:51,376 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:51,440 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:51,502 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:51,568 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:51,671 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:51,748 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:51,836 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 [2019-01-20 10:10:51,842 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 [2019-01-20 10:10:51,860 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 [2019-01-20 10:10:51,880 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 [2019-01-20 10:10:51,899 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 [2019-01-20 10:10:51,919 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 [2019-01-20 10:10:51,940 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 [2019-01-20 10:10:51,958 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 [2019-01-20 10:10:52,144 INFO L303 Elim1Store]: Index analysis took 177 ms [2019-01-20 10:10:52,146 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 [2019-01-20 10:10:52,147 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:52,239 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:52,302 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:52,350 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:52,386 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:52,415 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:52,441 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:52,464 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:52,485 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:52,602 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. [2019-01-20 10:10:52,602 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-20 10:10:52,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:52,659 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 [2019-01-20 10:10:52,660 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:52,904 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. [2019-01-20 10:10:52,905 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-20 10:10:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:52,933 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:10:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:52,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:10:52,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:10:52,973 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:10:52,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:10:52,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:10:52,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:10:52,974 INFO L87 Difference]: Start difference. First operand 24 states and 52 transitions. Second operand 6 states. [2019-01-20 10:11:03,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:03,966 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-01-20 10:11:03,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-20 10:11:03,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-20 10:11:03,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:03,968 INFO L225 Difference]: With dead ends: 54 [2019-01-20 10:11:03,970 INFO L226 Difference]: Without dead ends: 52 [2019-01-20 10:11:03,970 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 [2019-01-20 10:11:03,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-20 10:11:03,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 29. [2019-01-20 10:11:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-20 10:11:03,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 69 transitions. [2019-01-20 10:11:03,984 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 69 transitions. Word has length 3 [2019-01-20 10:11:03,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:03,984 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 69 transitions. [2019-01-20 10:11:03,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:11:03,984 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 69 transitions. [2019-01-20 10:11:03,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:11:03,985 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:03,985 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:11:03,985 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:03,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:03,985 INFO L82 PathProgramCache]: Analyzing trace with hash 30946, now seen corresponding path program 1 times [2019-01-20 10:11:03,986 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:03,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:03,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:03,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:03,987 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:04,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:04,095 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:04,096 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:11:04,096 INFO L207 CegarAbsIntRunner]: [0], [36], [39] [2019-01-20 10:11:04,097 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:04,097 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:04,107 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:04,107 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. [2019-01-20 10:11:04,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:04,108 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:04,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:04,108 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 [2019-01-20 10:11:04,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:04,122 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:04,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:04,199 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 [2019-01-20 10:11:04,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-20 10:11:04,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,211 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 [2019-01-20 10:11:04,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,279 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 [2019-01-20 10:11:04,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,293 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 [2019-01-20 10:11:04,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-20 10:11:04,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,390 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 [2019-01-20 10:11:04,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,448 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 [2019-01-20 10:11:04,555 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 [2019-01-20 10:11:04,557 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,658 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,726 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,774 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,813 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,844 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,868 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,890 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,908 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:04,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:04,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-20 10:11:05,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,019 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 [2019-01-20 10:11:05,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,080 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 [2019-01-20 10:11:05,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,170 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 [2019-01-20 10:11:05,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-20 10:11:05,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,374 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 [2019-01-20 10:11:05,494 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:11:05,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:05,512 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 [2019-01-20 10:11:05,513 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:05,573 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:05,628 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:05,685 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:05,765 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:05,829 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:05,897 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:06,008 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. [2019-01-20 10:11:06,009 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-20 10:11:07,718 WARN L181 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 88 [2019-01-20 10:11:07,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:07,866 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 [2019-01-20 10:11:07,867 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-01-20 10:11:08,013 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 256 xjuncts. [2019-01-20 10:11:12,281 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. [2019-01-20 10:11:12,282 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:168, output treesize:1159 [2019-01-20 10:11:18,314 WARN L181 SmtUtils]: Spent 3.84 s on a formula simplification. DAG size of input: 627 DAG size of output: 141 [2019-01-20 10:11:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:18,316 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:18,340 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-20 10:11:18,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-20 10:11:18,340 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:11:18,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-20 10:11:18,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-20 10:11:18,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-20 10:11:18,341 INFO L87 Difference]: Start difference. First operand 29 states and 69 transitions. Second operand 4 states. [2019-01-20 10:11:18,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:18,458 INFO L93 Difference]: Finished difference Result 31 states and 80 transitions. [2019-01-20 10:11:18,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-20 10:11:18,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-20 10:11:18,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:18,459 INFO L225 Difference]: With dead ends: 31 [2019-01-20 10:11:18,459 INFO L226 Difference]: Without dead ends: 30 [2019-01-20 10:11:18,460 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-20 10:11:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-20 10:11:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-01-20 10:11:18,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-20 10:11:18,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 79 transitions. [2019-01-20 10:11:18,466 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 79 transitions. Word has length 3 [2019-01-20 10:11:18,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:18,466 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 79 transitions. [2019-01-20 10:11:18,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-20 10:11:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 79 transitions. [2019-01-20 10:11:18,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:11:18,467 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:18,467 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:11:18,467 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:18,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:18,468 INFO L82 PathProgramCache]: Analyzing trace with hash 31072, now seen corresponding path program 1 times [2019-01-20 10:11:18,468 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:18,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:18,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:18,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:18,469 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:18,543 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-20 10:11:18,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-20 10:11:18,543 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:11:18,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-20 10:11:18,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-20 10:11:18,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-20 10:11:18,544 INFO L87 Difference]: Start difference. First operand 30 states and 79 transitions. Second operand 3 states. [2019-01-20 10:11:18,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:18,609 INFO L93 Difference]: Finished difference Result 37 states and 80 transitions. [2019-01-20 10:11:18,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-20 10:11:18,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-20 10:11:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:18,611 INFO L225 Difference]: With dead ends: 37 [2019-01-20 10:11:18,611 INFO L226 Difference]: Without dead ends: 36 [2019-01-20 10:11:18,611 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 [2019-01-20 10:11:18,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-20 10:11:18,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-01-20 10:11:18,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-20 10:11:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 78 transitions. [2019-01-20 10:11:18,618 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 78 transitions. Word has length 3 [2019-01-20 10:11:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:18,618 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 78 transitions. [2019-01-20 10:11:18,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-20 10:11:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 78 transitions. [2019-01-20 10:11:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:11:18,619 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:18,619 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:11:18,619 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:18,620 INFO L82 PathProgramCache]: Analyzing trace with hash 30140, now seen corresponding path program 1 times [2019-01-20 10:11:18,620 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:18,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:18,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:18,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:18,621 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:18,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:18,762 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:18,763 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:11:18,763 INFO L207 CegarAbsIntRunner]: [0], [10], [39] [2019-01-20 10:11:18,764 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:18,764 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:18,771 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:18,771 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. [2019-01-20 10:11:18,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:18,771 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:18,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:18,772 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 [2019-01-20 10:11:18,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:18,783 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:18,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:18,850 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 [2019-01-20 10:11:18,854 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 [2019-01-20 10:11:18,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,860 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 [2019-01-20 10:11:18,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,870 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 [2019-01-20 10:11:18,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,880 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 [2019-01-20 10:11:18,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,896 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 [2019-01-20 10:11:18,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,942 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 [2019-01-20 10:11:18,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:18,961 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 [2019-01-20 10:11:19,013 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 [2019-01-20 10:11:19,015 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:19,214 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:19,278 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:19,393 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:19,432 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:19,462 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:19,491 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:19,514 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:19,535 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:19,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,590 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 [2019-01-20 10:11:19,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,691 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 [2019-01-20 10:11:19,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,753 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 [2019-01-20 10:11:19,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,824 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 [2019-01-20 10:11:19,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:19,915 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 [2019-01-20 10:11:20,029 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-20 10:11:20,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,044 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 [2019-01-20 10:11:20,163 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:11:20,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,180 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 [2019-01-20 10:11:20,181 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:20,234 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:20,290 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:20,347 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:20,403 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:20,462 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:20,521 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:20,619 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. [2019-01-20 10:11:20,620 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-20 10:11:20,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:20,656 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 [2019-01-20 10:11:20,657 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:20,766 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. [2019-01-20 10:11:20,766 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-20 10:11:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:20,807 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:20,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:20,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:11:20,837 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:20,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:11:20,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:11:20,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:11:20,838 INFO L87 Difference]: Start difference. First operand 30 states and 78 transitions. Second operand 6 states. [2019-01-20 10:11:30,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:30,653 INFO L93 Difference]: Finished difference Result 71 states and 131 transitions. [2019-01-20 10:11:30,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:11:30,654 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-20 10:11:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:30,656 INFO L225 Difference]: With dead ends: 71 [2019-01-20 10:11:30,656 INFO L226 Difference]: Without dead ends: 70 [2019-01-20 10:11:30,656 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-20 10:11:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-20 10:11:30,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 31. [2019-01-20 10:11:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-20 10:11:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 88 transitions. [2019-01-20 10:11:30,664 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 88 transitions. Word has length 3 [2019-01-20 10:11:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:30,664 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 88 transitions. [2019-01-20 10:11:30,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:11:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 88 transitions. [2019-01-20 10:11:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:11:30,665 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:30,665 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:11:30,665 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:30,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:30,665 INFO L82 PathProgramCache]: Analyzing trace with hash 30636, now seen corresponding path program 1 times [2019-01-20 10:11:30,665 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:30,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:30,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:30,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:30,666 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:30,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:30,743 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:30,743 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:11:30,744 INFO L207 CegarAbsIntRunner]: [0], [26], [39] [2019-01-20 10:11:30,745 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:30,745 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:30,751 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:30,751 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. [2019-01-20 10:11:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:30,752 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:30,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:30,752 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 [2019-01-20 10:11:30,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:30,763 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:30,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:30,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,807 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 [2019-01-20 10:11:30,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,880 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 [2019-01-20 10:11:30,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:30,941 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 [2019-01-20 10:11:31,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,019 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 [2019-01-20 10:11:31,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,134 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 [2019-01-20 10:11:31,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,268 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 [2019-01-20 10:11:31,406 WARN L181 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:11:31,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:31,424 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 [2019-01-20 10:11:31,425 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:31,483 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:31,542 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:31,600 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:31,661 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:31,723 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:31,783 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:31,853 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 [2019-01-20 10:11:31,858 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 [2019-01-20 10:11:31,864 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 [2019-01-20 10:11:31,868 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 [2019-01-20 10:11:31,871 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 [2019-01-20 10:11:31,882 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 [2019-01-20 10:11:31,886 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 [2019-01-20 10:11:31,898 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 [2019-01-20 10:11:31,919 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 [2019-01-20 10:11:31,920 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:31,995 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:32,053 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:32,097 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:32,129 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:32,157 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:32,179 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:32,199 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:32,217 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:32,314 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. [2019-01-20 10:11:32,314 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:150, output treesize:158 [2019-01-20 10:11:32,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:32,383 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 [2019-01-20 10:11:32,384 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:32,477 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. [2019-01-20 10:11:32,477 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-20 10:11:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:32,497 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:32,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:32,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:11:32,526 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:32,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:11:32,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:11:32,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:11:32,527 INFO L87 Difference]: Start difference. First operand 31 states and 88 transitions. Second operand 6 states. [2019-01-20 10:11:42,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:42,470 INFO L93 Difference]: Finished difference Result 72 states and 141 transitions. [2019-01-20 10:11:42,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:11:42,470 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-20 10:11:42,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:42,472 INFO L225 Difference]: With dead ends: 72 [2019-01-20 10:11:42,472 INFO L226 Difference]: Without dead ends: 70 [2019-01-20 10:11:42,472 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 [2019-01-20 10:11:42,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-20 10:11:42,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 32. [2019-01-20 10:11:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-20 10:11:42,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 97 transitions. [2019-01-20 10:11:42,479 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 97 transitions. Word has length 3 [2019-01-20 10:11:42,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:42,480 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 97 transitions. [2019-01-20 10:11:42,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:11:42,480 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 97 transitions. [2019-01-20 10:11:42,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:42,480 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:42,480 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:42,481 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:42,481 INFO L82 PathProgramCache]: Analyzing trace with hash 941912, now seen corresponding path program 1 times [2019-01-20 10:11:42,481 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:42,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:42,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:42,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:42,482 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:42,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:42,601 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:42,601 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:42,602 INFO L207 CegarAbsIntRunner]: [0], [18], [34], [39] [2019-01-20 10:11:42,602 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:42,603 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:42,608 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:42,608 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. [2019-01-20 10:11:42,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:42,609 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:42,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:42,609 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 [2019-01-20 10:11:42,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:42,617 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:42,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:42,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,669 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 [2019-01-20 10:11:42,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,729 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 [2019-01-20 10:11:42,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,805 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 [2019-01-20 10:11:42,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,899 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 [2019-01-20 10:11:42,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:42,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,004 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 [2019-01-20 10:11:43,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,154 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 [2019-01-20 10:11:43,272 WARN L181 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:11:43,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:43,302 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 [2019-01-20 10:11:43,303 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:43,442 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:43,524 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:43,615 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:43,713 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:43,810 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:43,908 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:44,024 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 [2019-01-20 10:11:44,027 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 [2019-01-20 10:11:44,030 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 [2019-01-20 10:11:44,048 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 [2019-01-20 10:11:44,068 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 [2019-01-20 10:11:44,087 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 [2019-01-20 10:11:44,102 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 [2019-01-20 10:11:44,106 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 [2019-01-20 10:11:44,123 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 [2019-01-20 10:11:44,124 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:44,199 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:44,257 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:44,302 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:44,335 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:44,362 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:44,385 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:44,404 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:44,423 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:44,521 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. [2019-01-20 10:11:44,522 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:150, output treesize:158 [2019-01-20 10:11:46,658 WARN L181 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-01-20 10:11:46,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:46,694 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 [2019-01-20 10:11:46,695 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:46,784 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. [2019-01-20 10:11:46,785 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-20 10:11:47,027 WARN L181 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2019-01-20 10:11:47,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:47,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:47,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:47,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:47,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:47,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:47,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:47,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:47,109 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:11:47,111 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 [2019-01-20 10:11:47,112 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:47,221 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. [2019-01-20 10:11:47,221 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-20 10:11:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:47,315 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:11:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:47,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:11:47,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:11:47,358 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:11:47,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:11:47,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:11:47,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:11:47,359 INFO L87 Difference]: Start difference. First operand 32 states and 97 transitions. Second operand 8 states. [2019-01-20 10:11:50,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:11:50,713 INFO L93 Difference]: Finished difference Result 89 states and 175 transitions. [2019-01-20 10:11:50,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:11:50,714 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:11:50,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:11:50,715 INFO L225 Difference]: With dead ends: 89 [2019-01-20 10:11:50,715 INFO L226 Difference]: Without dead ends: 87 [2019-01-20 10:11:50,716 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:11:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-01-20 10:11:50,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 37. [2019-01-20 10:11:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-01-20 10:11:50,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 107 transitions. [2019-01-20 10:11:50,724 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 107 transitions. Word has length 4 [2019-01-20 10:11:50,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:11:50,724 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 107 transitions. [2019-01-20 10:11:50,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:11:50,724 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 107 transitions. [2019-01-20 10:11:50,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:11:50,725 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:11:50,725 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:11:50,725 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:11:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:50,726 INFO L82 PathProgramCache]: Analyzing trace with hash 941974, now seen corresponding path program 1 times [2019-01-20 10:11:50,726 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:11:50,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:50,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:50,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:11:50,727 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:11:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:11:50,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:50,821 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:11:50,821 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:11:50,822 INFO L207 CegarAbsIntRunner]: [0], [18], [36], [39] [2019-01-20 10:11:50,823 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:11:50,823 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:11:50,830 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:11:50,830 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. [2019-01-20 10:11:50,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:11:50,830 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:11:50,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:11:50,831 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 [2019-01-20 10:11:50,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:11:50,839 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:11:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:11:50,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:11:50,875 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 [2019-01-20 10:11:50,880 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 [2019-01-20 10:11:50,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,885 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 [2019-01-20 10:11:50,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,901 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 [2019-01-20 10:11:50,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,914 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 [2019-01-20 10:11:50,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,927 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 [2019-01-20 10:11:50,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,943 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 [2019-01-20 10:11:50,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:50,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,015 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 [2019-01-20 10:11:51,029 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 [2019-01-20 10:11:51,031 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,108 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,172 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,220 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,257 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,288 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,314 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,336 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,356 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:51,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,408 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 [2019-01-20 10:11:51,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,461 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 [2019-01-20 10:11:51,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,522 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 [2019-01-20 10:11:51,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-20 10:11:51,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,682 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 [2019-01-20 10:11:51,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,793 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 [2019-01-20 10:11:51,939 WARN L181 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:11:51,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:51,957 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 [2019-01-20 10:11:51,957 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:52,021 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:52,302 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:52,363 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:52,420 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:52,479 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:52,538 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:11:52,865 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. [2019-01-20 10:11:52,865 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:150, output treesize:158 [2019-01-20 10:11:52,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:52,948 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 [2019-01-20 10:11:52,950 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-20 10:11:53,268 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. [2019-01-20 10:11:53,268 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:168, output treesize:258 [2019-01-20 10:11:53,830 WARN L181 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-01-20 10:11:53,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:53,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,059 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:11:54,059 INFO L303 Elim1Store]: Index analysis took 218 ms [2019-01-20 10:11:54,060 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 [2019-01-20 10:11:54,061 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:11:54,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:11:54,523 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 [2019-01-20 10:11:54,524 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-20 10:11:54,577 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 128 xjuncts. [2019-01-20 10:11:57,732 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. [2019-01-20 10:11:57,733 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 17 variables, input treesize:280, output treesize:1007 [2019-01-20 10:12:09,261 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-01-20 10:12:09,462 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:12:09,464 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:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") 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:621) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:152) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java: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 [2019-01-20 10:12:09,470 INFO L168 Benchmark]: Toolchain (without parser) took 97312.16 ms. Allocated memory was 140.0 MB in the beginning and 477.1 MB in the end (delta: 337.1 MB). Free memory was 105.1 MB in the beginning and 363.7 MB in the end (delta: -258.7 MB). Peak memory consumption was 78.4 MB. Max. memory is 7.1 GB. [2019-01-20 10:12:09,470 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory is still 106.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-20 10:12:09,471 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.21 ms. Allocated memory is still 140.0 MB. Free memory was 104.8 MB in the beginning and 102.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-01-20 10:12:09,471 INFO L168 Benchmark]: Boogie Preprocessor took 25.52 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 101.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-20 10:12:09,471 INFO L168 Benchmark]: RCFGBuilder took 481.67 ms. Allocated memory is still 140.0 MB. Free memory was 101.1 MB in the beginning and 87.5 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2019-01-20 10:12:09,472 INFO L168 Benchmark]: TraceAbstraction took 96744.96 ms. Allocated memory was 140.0 MB in the beginning and 477.1 MB in the end (delta: 337.1 MB). Free memory was 87.3 MB in the beginning and 363.7 MB in the end (delta: -276.5 MB). Peak memory consumption was 60.7 MB. Max. memory is 7.1 GB. [2019-01-20 10:12:09,474 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 0.17 ms. Allocated memory is still 140.0 MB. Free memory is still 106.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 56.21 ms. Allocated memory is still 140.0 MB. Free memory was 104.8 MB in the beginning and 102.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.52 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 101.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 481.67 ms. Allocated memory is still 140.0 MB. Free memory was 101.1 MB in the beginning and 87.5 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 96744.96 ms. Allocated memory was 140.0 MB in the beginning and 477.1 MB in the end (delta: 337.1 MB). Free memory was 87.3 MB in the beginning and 363.7 MB in the end (delta: -276.5 MB). Peak memory consumption was 60.7 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:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : 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...