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_array_oct.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b7bd044-m [2019-01-20 10:39:48,084 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-20 10:39:48,086 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-20 10:39:48,104 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-20 10:39:48,104 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-20 10:39:48,105 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-20 10:39:48,107 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-20 10:39:48,110 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-20 10:39:48,113 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-20 10:39:48,114 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-20 10:39:48,115 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-20 10:39:48,163 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2019-01-20 10:39:48,185 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-20 10:39:48,185 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-20 10:39:48,188 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-20 10:39:48,188 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-20 10:39:48,188 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-20 10:39:48,188 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-20 10:39:48,188 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-20 10:39:48,189 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-20 10:39:48,189 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-20 10:39:48,190 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-20 10:39:48,190 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-20 10:39:48,190 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-20 10:39:48,190 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-20 10:39:48,191 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-20 10:39:48,191 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-20 10:39:48,191 INFO L133 SettingsManager]: * Use SBE=true [2019-01-20 10:39:48,191 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-20 10:39:48,192 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-20 10:39:48,193 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-20 10:39:48,193 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-20 10:39:48,193 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-20 10:39:48,193 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-20 10:39:48,193 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-20 10:39:48,194 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-20 10:39:48,194 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-20 10:39:48,194 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-20 10:39:48,195 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-20 10:39:48,195 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-20 10:39:48,195 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-20 10:39:48,195 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-20 10:39:48,195 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-20 10:39:48,196 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-20 10:39:48,196 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-20 10:39:48,196 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-20 10:39:48,196 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-20 10:39:48,196 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-20 10:39:48,197 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-20 10:39:48,197 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-20 10:39:48,197 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-20 10:39:48,242 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-20 10:39:48,254 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-20 10:39:48,258 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-20 10:39:48,259 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-20 10:39:48,259 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-20 10:39:48,260 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl [2019-01-20 10:39:48,260 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl' [2019-01-20 10:39:48,294 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-20 10:39:48,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-20 10:39:48,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-20 10:39:48,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-20 10:39:48,297 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-20 10:39:48,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:39:48" (1/1) ... [2019-01-20 10:39:48,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:39:48" (1/1) ... [2019-01-20 10:39:48,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-20 10:39:48,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-20 10:39:48,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-20 10:39:48,354 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-20 10:39:48,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:39:48" (1/1) ... [2019-01-20 10:39:48,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:39:48" (1/1) ... [2019-01-20 10:39:48,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:39:48" (1/1) ... [2019-01-20 10:39:48,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:39:48" (1/1) ... [2019-01-20 10:39:48,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:39:48" (1/1) ... [2019-01-20 10:39:48,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:39:48" (1/1) ... [2019-01-20 10:39:48,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:39:48" (1/1) ... [2019-01-20 10:39:48,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-20 10:39:48,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-20 10:39:48,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-20 10:39:48,381 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-20 10:39:48,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:39:48" (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 10:39:48,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-20 10:39:48,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-20 10:39:48,897 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-20 10:39:48,898 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-01-20 10:39:48,899 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:39:48 BoogieIcfgContainer [2019-01-20 10:39:48,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-20 10:39:48,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-20 10:39:48,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-20 10:39:48,907 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-20 10:39:48,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:39:48" (1/2) ... [2019-01-20 10:39:48,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c7798b and model type speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:39:48, skipping insertion in model container [2019-01-20 10:39:48,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:39:48" (2/2) ... [2019-01-20 10:39:48,912 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-unlimited.bpl [2019-01-20 10:39:48,922 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-20 10:39:48,931 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-01-20 10:39:48,949 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-01-20 10:39:48,988 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-20 10:39:48,988 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-20 10:39:48,988 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-20 10:39:48,989 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-20 10:39:48,989 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-20 10:39:48,989 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-20 10:39:48,989 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-20 10:39:48,989 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-20 10:39:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-01-20 10:39:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-20 10:39:49,016 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:39:49,017 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-20 10:39:49,019 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:39:49,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:39:49,028 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-01-20 10:39:49,031 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:39:49,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:39:49,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:39:49,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:39:49,079 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:39:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:39:49,255 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 10:39:49,257 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-20 10:39:49,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-20 10:39:49,258 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:39:49,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-20 10:39:49,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-20 10:39:49,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-20 10:39:49,283 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-01-20 10:39:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:39:49,527 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-01-20 10:39:49,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-20 10:39:49,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-20 10:39:49,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:39:49,542 INFO L225 Difference]: With dead ends: 37 [2019-01-20 10:39:49,542 INFO L226 Difference]: Without dead ends: 32 [2019-01-20 10:39:49,546 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 10:39:49,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-20 10:39:49,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-01-20 10:39:49,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-01-20 10:39:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-01-20 10:39:49,600 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-01-20 10:39:49,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:39:49,601 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-01-20 10:39:49,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-20 10:39:49,602 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-01-20 10:39:49,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:39:49,602 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:39:49,603 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:39:49,603 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:39:49,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:39:49,604 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-01-20 10:39:49,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:39:49,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:39:49,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:39:49,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:39:49,605 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:39:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:39:49,856 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 10:39:49,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:39:49,856 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:39:49,858 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:39:49,860 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-01-20 10:39:49,922 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:39:49,923 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:39:53,822 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:39:53,824 INFO L272 AbstractInterpreter]: Visited 3 different actions 11 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:39:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:39:53,831 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:39:53,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:39:53,831 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 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 10:39:53,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:39:53,847 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:39:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:39:53,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:39:54,169 WARN L181 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-20 10:39:54,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:39:54,221 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:39:54,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:39:54,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,387 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:39:54,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,512 INFO L303 Elim1Store]: Index analysis took 117 ms [2019-01-20 10:39:54,514 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:39:54,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,640 INFO L303 Elim1Store]: Index analysis took 118 ms [2019-01-20 10:39:54,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:39:54,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,803 INFO L303 Elim1Store]: Index analysis took 155 ms [2019-01-20 10:39:54,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:39:54,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:54,920 INFO L303 Elim1Store]: Index analysis took 111 ms [2019-01-20 10:39:54,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:39:54,924 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:39:55,759 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:39:56,210 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:39:56,538 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:39:56,650 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:39:56,681 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:39:56,763 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:39:56,789 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:39:56,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:56,855 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 10:39:56,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:56,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:56,922 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 10:39:57,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,030 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 10:39:57,164 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-20 10:39:57,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,178 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 10:39:57,301 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-20 10:39:57,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,316 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 10:39:57,448 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-20 10:39:57,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,471 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 10:39:57,626 WARN L181 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:39:57,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:57,647 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 10:39:57,649 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:39:57,711 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:39:57,784 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:39:57,844 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:39:57,909 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:39:57,980 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:39:58,089 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:39:58,199 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 10:39:58,200 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:147, output treesize:153 [2019-01-20 10:39:58,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:39:58,289 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 10:39:58,290 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:39:58,481 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 10:39:58,482 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-20 10:39:58,551 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 10:39:58,551 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:39:58,573 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 10:39:58,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:39:58,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:39:58,594 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:39:58,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:39:58,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:39:58,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:39:58,596 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2019-01-20 10:40:10,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:40:10,171 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2019-01-20 10:40:10,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:40:10,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-20 10:40:10,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:40:10,174 INFO L225 Difference]: With dead ends: 63 [2019-01-20 10:40:10,175 INFO L226 Difference]: Without dead ends: 60 [2019-01-20 10:40:10,176 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-20 10:40:10,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-20 10:40:10,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-01-20 10:40:10,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-20 10:40:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2019-01-20 10:40:10,183 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2019-01-20 10:40:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:40:10,184 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2019-01-20 10:40:10,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:40:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2019-01-20 10:40:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:40:10,184 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:40:10,185 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:40:10,185 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:40:10,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:10,186 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2019-01-20 10:40:10,186 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:40:10,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:10,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:10,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:10,187 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:40:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:10,276 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 10:40:10,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:40:10,276 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:40:10,277 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:40:10,277 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2019-01-20 10:40:10,278 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:40:10,279 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:40:10,649 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:40:10,650 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:40:10,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:10,651 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:40:10,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:40:10,651 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 10:40:10,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:10,669 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:40:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:10,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:40:10,906 WARN L181 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-20 10:40:10,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:40:10,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:40:10,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:40:11,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:40:11,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,199 INFO L303 Elim1Store]: Index analysis took 111 ms [2019-01-20 10:40:11,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:40:11,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:40:11,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:11,468 INFO L303 Elim1Store]: Index analysis took 163 ms [2019-01-20 10:40:11,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:40:11,648 INFO L303 Elim1Store]: Index analysis took 175 ms [2019-01-20 10:40:11,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:40:11,651 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:11,900 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:12,013 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:12,051 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:12,079 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:12,109 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:12,131 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:12,157 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:12,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:40:12,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:40:12,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:40:12,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,386 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-20 10:40:12,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:40:12,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:40:12,603 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:12,644 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:12,683 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:12,756 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:12,804 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:12,846 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:12,923 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 10:40:12,923 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-20 10:40:12,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:12,989 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-20 10:40:12,990 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:13,060 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 10:40:13,061 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-20 10:40:13,085 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 10:40:13,085 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:40:13,095 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 10:40:13,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:40:13,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:40:13,115 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:40:13,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:40:13,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:40:13,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:40:13,116 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2019-01-20 10:40:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:40:14,062 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2019-01-20 10:40:14,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:40:14,062 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-20 10:40:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:40:14,064 INFO L225 Difference]: With dead ends: 62 [2019-01-20 10:40:14,064 INFO L226 Difference]: Without dead ends: 60 [2019-01-20 10:40:14,065 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 10:40:14,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-20 10:40:14,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2019-01-20 10:40:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-20 10:40:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2019-01-20 10:40:14,072 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2019-01-20 10:40:14,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:40:14,072 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2019-01-20 10:40:14,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:40:14,072 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2019-01-20 10:40:14,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:40:14,073 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:40:14,073 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:40:14,073 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:40:14,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:14,074 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2019-01-20 10:40:14,074 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:40:14,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:14,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:14,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:14,075 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:40:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:14,140 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 10:40:14,141 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-20 10:40:14,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-20 10:40:14,141 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:40:14,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-20 10:40:14,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-20 10:40:14,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-20 10:40:14,142 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2019-01-20 10:40:14,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:40:14,219 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2019-01-20 10:40:14,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-20 10:40:14,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-20 10:40:14,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:40:14,220 INFO L225 Difference]: With dead ends: 31 [2019-01-20 10:40:14,220 INFO L226 Difference]: Without dead ends: 30 [2019-01-20 10:40:14,221 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 10:40:14,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-20 10:40:14,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-01-20 10:40:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-20 10:40:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2019-01-20 10:40:14,226 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2019-01-20 10:40:14,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:40:14,226 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2019-01-20 10:40:14,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-20 10:40:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2019-01-20 10:40:14,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:40:14,227 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:40:14,227 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:40:14,228 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:40:14,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:14,228 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2019-01-20 10:40:14,228 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:40:14,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:14,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:14,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:14,229 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:40:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:14,315 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 10:40:14,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:40:14,315 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:40:14,316 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:40:14,316 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2019-01-20 10:40:14,319 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:40:14,319 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:40:14,680 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:40:14,681 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:40:14,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:14,681 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:40:14,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:40:14,682 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 10:40:14,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:14,700 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:40:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:14,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:40:14,950 WARN L181 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-20 10:40:14,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:14,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:40:15,339 WARN L181 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-01-20 10:40:15,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:40:15,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,436 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:40:15,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-20 10:40:15,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,673 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:40:15,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:15,788 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:40:15,790 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:15,837 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:15,878 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:15,924 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:15,994 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:16,049 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:16,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:40:16,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:40:16,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:40:16,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:40:16,151 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:40:16,156 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:40:16,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:40:16,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:40:16,189 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:16,243 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:16,287 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:16,319 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:16,343 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:16,451 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:16,470 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:16,488 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:16,566 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 10:40:16,567 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:121, output treesize:125 [2019-01-20 10:40:16,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:16,617 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-20 10:40:16,618 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:16,687 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 10:40:16,688 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-20 10:40:16,709 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 10:40:16,709 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:40:16,715 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 10:40:16,734 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-20 10:40:16,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-20 10:40:16,734 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:40:16,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-20 10:40:16,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-20 10:40:16,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-20 10:40:16,736 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2019-01-20 10:40:16,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:40:16,810 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2019-01-20 10:40:16,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-20 10:40:16,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-20 10:40:16,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:40:16,812 INFO L225 Difference]: With dead ends: 32 [2019-01-20 10:40:16,812 INFO L226 Difference]: Without dead ends: 31 [2019-01-20 10:40:16,813 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-20 10:40:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-01-20 10:40:16,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-01-20 10:40:16,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-20 10:40:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2019-01-20 10:40:16,821 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2019-01-20 10:40:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:40:16,821 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2019-01-20 10:40:16,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-20 10:40:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2019-01-20 10:40:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:40:16,822 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:40:16,822 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:40:16,822 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:40:16,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:16,823 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2019-01-20 10:40:16,823 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:40:16,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:16,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:16,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:16,824 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:40:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:16,970 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 10:40:16,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:40:16,970 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:40:16,970 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:40:16,970 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2019-01-20 10:40:16,971 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:40:16,971 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:40:17,266 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:40:17,267 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:40:17,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:17,267 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:40:17,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:40:17,267 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 10:40:17,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:17,285 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:40:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:17,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:40:17,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:40:17,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:40:17,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:40:17,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:40:17,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:40:17,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:40:17,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:40:17,548 INFO L303 Elim1Store]: Index analysis took 121 ms [2019-01-20 10:40:17,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:40:17,550 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:17,613 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:17,659 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:17,698 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:17,728 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:17,753 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:17,773 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:17,794 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:17,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:40:17,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:17,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:40:18,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,006 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:40:18,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-20 10:40:18,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:40:18,406 WARN L181 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-20 10:40:18,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:40:18,424 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:18,466 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:18,507 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:18,551 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:18,647 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:18,690 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:18,766 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 10:40:18,767 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-20 10:40:18,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:18,806 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-20 10:40:18,808 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:18,927 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 10:40:18,928 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-20 10:40:18,948 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 10:40:18,948 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:40:18,975 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 10:40:18,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:40:18,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:40:18,994 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:40:18,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:40:18,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:40:18,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:40:18,995 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2019-01-20 10:40:19,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:40:19,923 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2019-01-20 10:40:19,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:40:19,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-20 10:40:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:40:19,925 INFO L225 Difference]: With dead ends: 65 [2019-01-20 10:40:19,925 INFO L226 Difference]: Without dead ends: 64 [2019-01-20 10:40:19,926 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 10:40:19,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-01-20 10:40:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2019-01-20 10:40:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-20 10:40:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2019-01-20 10:40:19,935 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2019-01-20 10:40:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:40:19,935 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2019-01-20 10:40:19,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:40:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2019-01-20 10:40:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:40:19,936 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:40:19,936 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:40:19,936 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:40:19,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:19,937 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2019-01-20 10:40:19,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:40:19,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:19,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:19,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:19,937 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:40:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:20,091 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 10:40:20,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:40:20,091 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:40:20,091 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:40:20,092 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2019-01-20 10:40:20,093 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:40:20,093 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:40:20,428 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:40:20,429 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:40:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:20,429 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:40:20,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:40:20,429 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 10:40:20,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:20,445 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:40:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:20,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:40:20,521 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:40:20,528 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:40:20,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,586 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:40:20,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,597 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:40:20,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:40:20,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,683 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:40:20,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,695 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:40:20,709 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:40:20,711 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:20,770 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:20,814 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:20,851 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:20,881 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:20,907 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:20,927 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:20,944 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:20,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:20,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:40:21,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,043 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:40:21,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:40:21,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-20 10:40:21,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:40:21,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:40:21,351 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:21,412 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:21,456 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:21,496 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:21,537 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:21,578 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:21,654 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 10:40:21,654 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-20 10:40:21,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:21,703 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-20 10:40:21,704 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:21,774 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 10:40:21,775 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-20 10:40:21,798 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 10:40:21,798 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:40:21,809 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 10:40:21,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:40:21,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:40:21,829 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:40:21,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:40:21,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:40:21,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:40:21,830 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2019-01-20 10:40:22,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:40:22,577 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2019-01-20 10:40:22,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:40:22,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-20 10:40:22,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:40:22,579 INFO L225 Difference]: With dead ends: 67 [2019-01-20 10:40:22,579 INFO L226 Difference]: Without dead ends: 65 [2019-01-20 10:40:22,579 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 10:40:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-01-20 10:40:22,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2019-01-20 10:40:22,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-01-20 10:40:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 132 transitions. [2019-01-20 10:40:22,588 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 132 transitions. Word has length 3 [2019-01-20 10:40:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:40:22,588 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 132 transitions. [2019-01-20 10:40:22,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:40:22,588 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 132 transitions. [2019-01-20 10:40:22,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:40:22,589 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:40:22,589 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:40:22,589 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:40:22,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:22,589 INFO L82 PathProgramCache]: Analyzing trace with hash 954866, now seen corresponding path program 1 times [2019-01-20 10:40:22,589 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:40:22,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:22,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:22,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:22,590 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:40:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:22,706 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 10:40:22,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:40:22,706 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:40:22,707 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:40:22,707 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [35] [2019-01-20 10:40:22,709 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:40:22,709 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:40:23,592 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:40:23,592 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:40:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:23,593 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:40:23,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:40:23,593 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 10:40:23,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:23,605 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:40:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:23,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:40:23,710 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:40:23,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:40:23,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,725 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:40:23,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:40:23,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:40:23,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,759 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:40:23,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:40:23,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:23,797 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:40:23,798 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:24,161 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:24,263 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:24,299 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:24,326 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:24,352 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:24,369 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:24,390 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:24,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,444 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 10:40:24,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,533 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 10:40:24,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,632 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 10:40:24,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,724 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 10:40:24,870 WARN L181 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-20 10:40:24,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 10:40:24,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:24,996 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 10:40:25,122 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:40:25,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,140 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 10:40:25,141 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:25,216 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:25,276 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:25,347 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:25,407 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:25,471 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:25,534 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:25,632 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:40:25,633 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-20 10:40:25,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,691 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 10:40:25,692 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:25,794 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 10:40:25,794 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-20 10:40:25,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:25,899 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:40:25,900 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-20 10:40:25,901 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:25,993 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 10:40:25,994 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-20 10:40:26,051 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 10:40:26,051 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:40:26,102 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 10:40:26,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:40:26,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:40:26,121 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:40:26,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:40:26,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:40:26,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:40:26,122 INFO L87 Difference]: Start difference. First operand 34 states and 132 transitions. Second operand 8 states. [2019-01-20 10:40:30,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:40:30,572 INFO L93 Difference]: Finished difference Result 82 states and 191 transitions. [2019-01-20 10:40:30,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:40:30,572 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:40:30,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:40:30,574 INFO L225 Difference]: With dead ends: 82 [2019-01-20 10:40:30,574 INFO L226 Difference]: Without dead ends: 80 [2019-01-20 10:40:30,575 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:40:30,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-20 10:40:30,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2019-01-20 10:40:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-01-20 10:40:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 128 transitions. [2019-01-20 10:40:30,594 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 128 transitions. Word has length 4 [2019-01-20 10:40:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:40:30,594 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 128 transitions. [2019-01-20 10:40:30,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:40:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 128 transitions. [2019-01-20 10:40:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:40:30,596 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:40:30,597 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:40:30,597 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:40:30,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:30,597 INFO L82 PathProgramCache]: Analyzing trace with hash 955426, now seen corresponding path program 1 times [2019-01-20 10:40:30,597 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:40:30,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:30,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:30,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:30,599 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:40:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:40:30,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:40:30,712 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:40:30,712 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:40:30,713 INFO L207 CegarAbsIntRunner]: [0], [32], [36], [37] [2019-01-20 10:40:30,714 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:40:30,714 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:40:32,313 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:40:32,314 INFO L272 AbstractInterpreter]: Visited 4 different actions 12 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:40:32,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:32,314 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:40:32,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:40:32,314 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 10:40:32,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:32,323 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:40:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:32,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:40:32,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-20 10:40:32,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-20 10:40:32,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,441 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-20 10:40:32,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,512 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-20 10:40:32,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-20 10:40:32,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:32,709 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-20 10:40:32,710 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:32,768 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:32,827 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:32,882 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:32,943 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:33,004 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:33,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:40:33,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-20 10:40:33,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-20 10:40:33,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-20 10:40:33,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-20 10:40:33,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-20 10:40:33,207 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-20 10:40:33,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-20 10:40:33,226 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:33,281 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:33,323 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:33,354 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:33,378 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:33,397 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:33,415 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:33,432 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:33,514 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 10:40:33,514 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-20 10:40:34,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:34,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 149 [2019-01-20 10:40:34,300 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-20 10:40:34,355 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-20 10:40:36,150 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 54 dim-0 vars, and 9 xjuncts. [2019-01-20 10:40:36,151 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:131, output treesize:941 [2019-01-20 10:40:47,364 WARN L181 SmtUtils]: Spent 8.76 s on a formula simplification. DAG size of input: 511 DAG size of output: 113 [2019-01-20 10:40:47,371 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 10:40:47,371 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:40:47,377 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 10:40:47,404 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-20 10:40:47,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-20 10:40:47,404 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:40:47,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-20 10:40:47,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-20 10:40:47,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-20 10:40:47,405 INFO L87 Difference]: Start difference. First operand 36 states and 128 transitions. Second operand 4 states. [2019-01-20 10:40:47,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:40:47,465 INFO L93 Difference]: Finished difference Result 40 states and 140 transitions. [2019-01-20 10:40:47,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-20 10:40:47,466 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-20 10:40:47,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:40:47,467 INFO L225 Difference]: With dead ends: 40 [2019-01-20 10:40:47,467 INFO L226 Difference]: Without dead ends: 39 [2019-01-20 10:40:47,468 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-20 10:40:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-01-20 10:40:47,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-01-20 10:40:47,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-20 10:40:47,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 138 transitions. [2019-01-20 10:40:47,479 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 138 transitions. Word has length 4 [2019-01-20 10:40:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:40:47,480 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 138 transitions. [2019-01-20 10:40:47,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-20 10:40:47,480 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 138 transitions. [2019-01-20 10:40:47,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:40:47,481 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:40:47,481 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:40:47,481 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:40:47,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:47,481 INFO L82 PathProgramCache]: Analyzing trace with hash 954990, now seen corresponding path program 1 times [2019-01-20 10:40:47,482 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:40:47,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:47,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:47,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:47,485 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:40:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:47,568 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 10:40:47,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:40:47,569 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:40:47,569 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:40:47,569 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [35] [2019-01-20 10:40:47,570 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:40:47,571 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:40:48,232 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:40:48,232 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:40:48,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:48,233 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:40:48,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:40:48,233 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:40:48,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:48,242 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:40:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:48,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:40:48,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,300 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 10:40:48,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,380 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 10:40:48,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,454 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 10:40:48,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,538 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 10:40:48,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,642 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 10:40:48,746 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-20 10:40:48,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,768 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 10:40:48,897 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:40:48,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:48,919 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 10:40:48,921 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:48,984 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:49,051 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:49,129 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:49,204 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:49,283 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:49,363 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:49,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:40:49,450 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:40:49,453 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:40:49,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:40:49,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:40:49,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:40:49,471 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:40:49,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:40:49,481 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:49,557 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:49,609 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:49,645 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:49,671 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:49,691 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:49,710 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:49,728 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:49,829 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:40:49,829 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-20 10:40:49,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:49,869 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 10:40:49,870 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:49,982 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 10:40:49,982 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-20 10:40:50,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:50,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:50,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:50,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:50,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:50,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:50,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:50,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:50,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:50,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:50,030 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-20 10:40:50,031 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:50,157 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 10:40:50,158 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-20 10:40:50,279 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 10:40:50,279 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:40:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:40:50,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:40:50,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:40:50,326 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:40:50,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:40:50,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:40:50,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:40:50,327 INFO L87 Difference]: Start difference. First operand 38 states and 138 transitions. Second operand 8 states. [2019-01-20 10:40:54,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:40:54,455 INFO L93 Difference]: Finished difference Result 84 states and 220 transitions. [2019-01-20 10:40:54,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:40:54,456 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:40:54,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:40:54,457 INFO L225 Difference]: With dead ends: 84 [2019-01-20 10:40:54,457 INFO L226 Difference]: Without dead ends: 82 [2019-01-20 10:40:54,458 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:40:54,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-01-20 10:40:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2019-01-20 10:40:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-20 10:40:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-20 10:40:54,478 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-20 10:40:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:40:54,478 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-20 10:40:54,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:40:54,478 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-20 10:40:54,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:40:54,478 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:40:54,478 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:40:54,479 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:40:54,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:54,479 INFO L82 PathProgramCache]: Analyzing trace with hash 954618, now seen corresponding path program 1 times [2019-01-20 10:40:54,479 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:40:54,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:54,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:54,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:40:54,480 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:40:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:54,729 WARN L181 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-20 10:40:54,740 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 10:40:54,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:40:54,740 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:40:54,741 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:40:54,741 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [35] [2019-01-20 10:40:54,742 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:40:54,742 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:40:55,428 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:40:55,428 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:40:55,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:40:55,428 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:40:55,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:40:55,428 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:40:55,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:40:55,437 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:40:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:40:55,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:40:55,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,519 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 10:40:55,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,601 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 10:40:55,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,666 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 10:40:55,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,744 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 10:40:55,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,836 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 10:40:55,939 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-20 10:40:55,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:55,956 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 10:40:56,088 WARN L181 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:40:56,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:56,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:56,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:56,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:56,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:56,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:56,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:56,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:56,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:56,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:56,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:56,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:56,105 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 10:40:56,106 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:56,164 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:56,226 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:56,288 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:56,349 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:56,410 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:56,470 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:56,558 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:40:56,564 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:40:56,567 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:40:56,571 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:40:56,575 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:40:56,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:40:56,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:40:56,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:40:56,588 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:56,658 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:56,698 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:56,731 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:56,756 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:56,777 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:56,792 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:56,809 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:40:56,904 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:40:56,905 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-20 10:40:56,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:56,941 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 10:40:56,941 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:57,035 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 10:40:57,035 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-20 10:40:57,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:57,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:57,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:57,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:57,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:57,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:57,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:57,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:57,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:40:57,073 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:40:57,075 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-20 10:40:57,076 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:40:57,171 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 10:40:57,172 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-20 10:40:57,194 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 10:40:57,194 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:40:57,220 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 10:40:57,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:40:57,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:40:57,239 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:40:57,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:40:57,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:40:57,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:40:57,240 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-20 10:41:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:01,375 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-20 10:41:01,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:41:01,376 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:41:01,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:01,378 INFO L225 Difference]: With dead ends: 81 [2019-01-20 10:41:01,378 INFO L226 Difference]: Without dead ends: 80 [2019-01-20 10:41:01,378 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:41:01,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-20 10:41:01,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2019-01-20 10:41:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-20 10:41:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-20 10:41:01,387 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-20 10:41:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:01,387 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-20 10:41:01,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:41:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-20 10:41:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:41:01,388 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:01,388 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:41:01,389 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:01,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:01,389 INFO L82 PathProgramCache]: Analyzing trace with hash 955114, now seen corresponding path program 1 times [2019-01-20 10:41:01,389 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:01,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:01,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:01,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:01,390 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:01,733 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 10:41:01,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:01,734 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:01,734 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:41:01,735 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [35] [2019-01-20 10:41:01,736 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:01,736 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:02,477 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:02,477 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:41:02,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:02,478 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:02,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:02,478 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:02,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:02,494 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:02,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:02,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,565 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 10:41:02,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,625 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 10:41:02,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,698 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 10:41:02,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,781 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 10:41:02,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,884 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 10:41:02,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:02,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:03,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:03,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:03,006 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 10:41:03,134 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:41:03,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:03,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:03,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:03,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:03,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:03,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:03,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:03,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:03,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:03,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:03,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:03,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:03,158 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 10:41:03,160 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:03,229 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:03,302 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:03,376 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:03,454 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:03,533 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:03,606 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:03,697 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:03,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:41:03,702 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:41:03,706 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:41:03,709 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:41:03,713 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:41:03,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:41:03,722 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:41:03,722 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:03,793 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:03,834 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:03,864 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:03,890 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:03,912 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:03,930 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:03,945 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:04,038 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:04,038 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-20 10:41:04,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:04,071 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 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 10:41:04,071 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:04,172 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 10:41:04,173 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-20 10:41:04,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:04,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:04,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:04,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:04,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:04,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:04,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:04,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:04,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:04,213 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:41:04,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-20 10:41:04,216 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:04,315 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 10:41:04,315 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-20 10:41:04,454 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 10:41:04,454 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:41:04,476 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 10:41:04,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:41:04,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:41:04,495 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:41:04,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:41:04,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:41:04,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:41:04,496 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-20 10:41:06,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:06,181 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-20 10:41:06,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:41:06,182 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:41:06,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:06,183 INFO L225 Difference]: With dead ends: 81 [2019-01-20 10:41:06,183 INFO L226 Difference]: Without dead ends: 79 [2019-01-20 10:41:06,184 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:41:06,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-01-20 10:41:06,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2019-01-20 10:41:06,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-01-20 10:41:06,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 175 transitions. [2019-01-20 10:41:06,195 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 175 transitions. Word has length 4 [2019-01-20 10:41:06,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:06,195 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 175 transitions. [2019-01-20 10:41:06,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:41:06,195 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 175 transitions. [2019-01-20 10:41:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:41:06,196 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:06,196 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:41:06,196 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:06,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:06,197 INFO L82 PathProgramCache]: Analyzing trace with hash 954742, now seen corresponding path program 1 times [2019-01-20 10:41:06,197 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:06,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:06,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:06,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:06,198 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:06,390 WARN L181 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2019-01-20 10:41:06,445 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 10:41:06,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:06,446 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:06,446 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:41:06,446 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [35] [2019-01-20 10:41:06,447 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:06,448 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:07,254 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:07,254 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:41:07,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:07,255 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:07,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:07,255 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:07,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:07,273 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:07,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:07,422 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-20 10:41:07,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:07,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:41:07,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,436 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:41:07,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,510 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:41:07,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,623 INFO L303 Elim1Store]: Index analysis took 111 ms [2019-01-20 10:41:07,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:41:07,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,748 INFO L303 Elim1Store]: Index analysis took 122 ms [2019-01-20 10:41:07,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:41:07,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,896 INFO L303 Elim1Store]: Index analysis took 142 ms [2019-01-20 10:41:07,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:41:07,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:07,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:08,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:08,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:08,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:08,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:08,083 INFO L303 Elim1Store]: Index analysis took 182 ms [2019-01-20 10:41:08,084 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:41:08,084 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:08,979 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:09,570 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:10,039 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:10,190 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:10,215 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:10,235 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:10,255 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:10,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,309 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 10:41:10,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,373 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 10:41:10,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,440 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 10:41:10,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,511 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 10:41:10,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-20 10:41:10,710 WARN L181 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-20 10:41:10,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,725 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 10:41:10,852 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:41:10,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:10,869 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 10:41:10,869 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:10,924 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:10,980 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:11,039 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:11,100 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:11,157 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:11,218 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:11,312 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:11,312 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-20 10:41:11,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:11,349 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 10:41:11,349 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:11,443 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 10:41:11,444 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-20 10:41:11,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:11,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:11,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:11,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:11,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:11,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:11,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:11,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:11,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:11,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:11,687 INFO L303 Elim1Store]: Index analysis took 213 ms [2019-01-20 10:41:11,688 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-20 10:41:11,688 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:11,785 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 10:41:11,785 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-20 10:41:11,867 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 10:41:11,867 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:41:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:41:11,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:41:11,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-20 10:41:11,920 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:41:11,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:41:11,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:41:11,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-20 10:41:11,920 INFO L87 Difference]: Start difference. First operand 44 states and 175 transitions. Second operand 8 states. [2019-01-20 10:41:15,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:15,341 INFO L93 Difference]: Finished difference Result 99 states and 274 transitions. [2019-01-20 10:41:15,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-20 10:41:15,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:41:15,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:15,342 INFO L225 Difference]: With dead ends: 99 [2019-01-20 10:41:15,342 INFO L226 Difference]: Without dead ends: 95 [2019-01-20 10:41:15,343 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-20 10:41:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-01-20 10:41:15,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2019-01-20 10:41:15,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-01-20 10:41:15,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 210 transitions. [2019-01-20 10:41:15,354 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 210 transitions. Word has length 4 [2019-01-20 10:41:15,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:15,354 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 210 transitions. [2019-01-20 10:41:15,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:41:15,354 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 210 transitions. [2019-01-20 10:41:15,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:41:15,355 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:15,355 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:41:15,355 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:15,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:15,356 INFO L82 PathProgramCache]: Analyzing trace with hash 941536, now seen corresponding path program 1 times [2019-01-20 10:41:15,356 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:15,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:15,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:15,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:15,357 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:15,510 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 10:41:15,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:15,511 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:15,511 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:41:15,511 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [35] [2019-01-20 10:41:15,512 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:15,512 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:15,862 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:15,862 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:41:15,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:15,862 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:15,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:15,862 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:15,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:15,875 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:15,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:15,923 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:15,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:41:15,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:41:15,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:41:15,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:41:15,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,981 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:41:15,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:15,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:41:16,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:41:16,010 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:16,070 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:16,132 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:16,165 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:16,195 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:16,216 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:16,236 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:16,254 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:16,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:41:16,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:41:16,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,400 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:41:16,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-20 10:41:16,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,537 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:41:16,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:41:16,637 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:16,676 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:16,715 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:16,757 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:16,798 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:16,838 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:16,908 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:16,908 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:41:16,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:16,955 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-20 10:41:16,956 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:17,018 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:17,019 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:41:17,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:17,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:17,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:17,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:17,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:17,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:17,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:17,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:17,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:17,257 INFO L303 Elim1Store]: Index analysis took 211 ms [2019-01-20 10:41:17,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 134 [2019-01-20 10:41:17,265 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:18,013 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 10:41:18,014 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-20 10:41:18,235 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2019-01-20 10:41:18,237 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 10:41:18,237 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:41:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:41:18,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:41:18,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:41:18,434 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:41:18,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:41:18,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:41:18,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:41:18,435 INFO L87 Difference]: Start difference. First operand 52 states and 210 transitions. Second operand 8 states. [2019-01-20 10:41:18,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:18,945 INFO L93 Difference]: Finished difference Result 101 states and 289 transitions. [2019-01-20 10:41:18,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:41:18,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:41:18,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:18,947 INFO L225 Difference]: With dead ends: 101 [2019-01-20 10:41:18,947 INFO L226 Difference]: Without dead ends: 99 [2019-01-20 10:41:18,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:41:18,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-20 10:41:18,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2019-01-20 10:41:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-20 10:41:18,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 243 transitions. [2019-01-20 10:41:18,962 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 243 transitions. Word has length 4 [2019-01-20 10:41:18,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:18,962 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 243 transitions. [2019-01-20 10:41:18,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:41:18,962 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 243 transitions. [2019-01-20 10:41:18,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:41:18,963 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:18,963 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:41:18,963 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:18,964 INFO L82 PathProgramCache]: Analyzing trace with hash 941164, now seen corresponding path program 1 times [2019-01-20 10:41:18,964 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:18,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:18,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:18,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:18,965 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:19,075 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 10:41:19,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:19,075 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:19,076 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:41:19,076 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [35] [2019-01-20 10:41:19,078 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:19,078 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:19,385 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:19,385 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:41:19,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:19,385 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:19,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:19,385 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:19,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:19,394 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:19,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:19,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:41:19,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:41:19,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,556 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:41:19,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-20 10:41:19,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,724 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:41:19,830 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-20 10:41:19,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:19,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:41:19,850 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:19,892 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:19,935 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:19,978 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:20,020 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:20,063 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:20,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:20,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:41:20,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:41:20,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:41:20,127 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:41:20,156 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:41:20,173 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:41:20,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:41:20,219 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:20,275 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:20,556 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:20,588 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:20,614 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:20,634 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:20,653 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:20,670 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:20,745 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:20,746 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:41:20,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:20,797 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-20 10:41:20,798 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:20,865 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:20,865 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:41:20,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:20,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:20,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:20,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:20,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:20,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:20,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:20,896 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:41:20,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-20 10:41:20,898 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:20,968 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 10:41:20,968 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-20 10:41:20,994 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 10:41:20,994 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:41:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:41:21,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:41:21,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:41:21,038 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:41:21,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:41:21,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:41:21,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:41:21,039 INFO L87 Difference]: Start difference. First operand 59 states and 243 transitions. Second operand 8 states. [2019-01-20 10:41:21,315 WARN L181 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2019-01-20 10:41:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:22,058 INFO L93 Difference]: Finished difference Result 99 states and 302 transitions. [2019-01-20 10:41:22,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:41:22,058 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:41:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:22,060 INFO L225 Difference]: With dead ends: 99 [2019-01-20 10:41:22,060 INFO L226 Difference]: Without dead ends: 98 [2019-01-20 10:41:22,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:41:22,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-20 10:41:22,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2019-01-20 10:41:22,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-01-20 10:41:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 261 transitions. [2019-01-20 10:41:22,076 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 261 transitions. Word has length 4 [2019-01-20 10:41:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:22,076 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 261 transitions. [2019-01-20 10:41:22,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:41:22,076 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 261 transitions. [2019-01-20 10:41:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:41:22,077 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:22,077 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:41:22,077 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:22,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:22,077 INFO L82 PathProgramCache]: Analyzing trace with hash 941660, now seen corresponding path program 1 times [2019-01-20 10:41:22,077 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:22,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:22,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:22,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:22,079 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:22,162 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 10:41:22,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:22,162 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:22,162 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:41:22,163 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [35] [2019-01-20 10:41:22,163 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:22,164 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:22,434 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:22,434 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:41:22,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:22,435 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:22,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:22,435 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:22,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:22,443 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:22,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:22,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:22,495 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:41:22,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:41:22,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,515 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:41:22,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,526 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:41:22,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:41:22,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,551 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:41:22,565 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:41:22,566 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:22,625 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:22,674 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:22,709 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:22,737 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:22,760 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:22,778 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:22,816 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:22,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:41:22,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:41:22,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:22,965 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:41:23,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,045 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-20 10:41:23,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,123 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:41:23,233 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-20 10:41:23,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,247 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:41:23,247 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:23,293 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:23,334 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:23,373 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:23,415 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:23,457 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:23,526 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:23,526 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:41:23,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-20 10:41:23,573 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:23,635 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:23,635 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:41:23,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:23,673 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:41:23,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-20 10:41:23,675 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:23,742 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 10:41:23,742 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-20 10:41:23,763 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 10:41:23,763 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:41:23,785 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 10:41:23,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:41:23,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:41:23,804 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:41:23,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:41:23,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:41:23,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:41:23,806 INFO L87 Difference]: Start difference. First operand 61 states and 261 transitions. Second operand 8 states. [2019-01-20 10:41:24,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:24,419 INFO L93 Difference]: Finished difference Result 101 states and 320 transitions. [2019-01-20 10:41:24,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:41:24,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:41:24,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:24,420 INFO L225 Difference]: With dead ends: 101 [2019-01-20 10:41:24,420 INFO L226 Difference]: Without dead ends: 99 [2019-01-20 10:41:24,421 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:41:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-20 10:41:24,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2019-01-20 10:41:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-01-20 10:41:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 278 transitions. [2019-01-20 10:41:24,440 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 278 transitions. Word has length 4 [2019-01-20 10:41:24,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:24,440 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 278 transitions. [2019-01-20 10:41:24,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:41:24,440 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 278 transitions. [2019-01-20 10:41:24,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:41:24,441 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:24,441 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:41:24,442 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:24,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:24,442 INFO L82 PathProgramCache]: Analyzing trace with hash 941288, now seen corresponding path program 1 times [2019-01-20 10:41:24,442 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:24,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:24,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:24,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:24,443 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:24,539 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 10:41:24,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:24,540 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:24,540 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:41:24,540 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [35] [2019-01-20 10:41:24,541 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:24,541 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:24,853 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:24,853 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:41:24,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:24,854 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:24,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:24,854 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:24,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:24,864 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:24,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:24,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:24,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:41:25,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,016 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:41:25,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,071 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:41:25,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-20 10:41:25,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:41:25,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:41:25,318 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:25,357 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:25,398 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:25,444 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:25,487 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:25,530 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:25,586 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:25,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:41:25,593 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:41:25,596 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:41:25,600 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:41:25,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:41:25,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:41:25,629 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:41:25,630 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:25,709 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:25,752 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:25,786 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:25,813 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:25,833 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:25,851 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:25,868 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:25,940 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:25,940 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:41:25,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:25,989 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-20 10:41:25,990 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:26,052 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:26,052 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:41:26,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:26,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:26,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:26,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:26,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:26,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:26,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:26,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:26,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:26,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-20 10:41:26,089 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:26,158 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 10:41:26,158 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-20 10:41:26,180 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 10:41:26,181 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:41:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:41:26,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:41:26,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:41:26,221 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:41:26,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:41:26,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:41:26,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:41:26,221 INFO L87 Difference]: Start difference. First operand 62 states and 278 transitions. Second operand 8 states. [2019-01-20 10:41:26,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:26,881 INFO L93 Difference]: Finished difference Result 106 states and 350 transitions. [2019-01-20 10:41:26,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:41:26,882 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:41:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:26,884 INFO L225 Difference]: With dead ends: 106 [2019-01-20 10:41:26,884 INFO L226 Difference]: Without dead ends: 104 [2019-01-20 10:41:26,884 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-01-20 10:41:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-01-20 10:41:26,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2019-01-20 10:41:26,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-01-20 10:41:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 304 transitions. [2019-01-20 10:41:26,899 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 304 transitions. Word has length 4 [2019-01-20 10:41:26,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:26,900 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 304 transitions. [2019-01-20 10:41:26,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:41:26,900 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 304 transitions. [2019-01-20 10:41:26,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:41:26,900 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:26,901 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:41:26,901 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:26,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:26,901 INFO L82 PathProgramCache]: Analyzing trace with hash 941784, now seen corresponding path program 1 times [2019-01-20 10:41:26,901 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:26,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:26,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:26,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:26,902 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:27,087 WARN L181 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-20 10:41:27,099 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 10:41:27,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:27,099 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:27,099 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:41:27,099 INFO L207 CegarAbsIntRunner]: [0], [18], [30], [35] [2019-01-20 10:41:27,100 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:27,100 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:27,364 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:27,364 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:41:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:27,365 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:27,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:27,365 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:27,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:27,376 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:27,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:27,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:27,435 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:41:27,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,442 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:41:27,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,449 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:41:27,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:41:27,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:41:27,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,479 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:41:27,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:41:27,493 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:27,554 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:27,600 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:27,637 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:27,669 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:27,695 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:27,714 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:27,732 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:27,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:41:27,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,828 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:41:27,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:41:27,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:27,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-20 10:41:28,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:41:28,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:41:28,140 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:28,177 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:28,216 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:28,256 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:28,311 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:28,350 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:28,419 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:28,420 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:41:28,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,468 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-20 10:41:28,468 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:28,531 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:28,532 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:41:28,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:28,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-20 10:41:28,569 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:28,634 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 10:41:28,634 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-20 10:41:28,667 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 10:41:28,667 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:41:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:41:28,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:41:28,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:41:28,705 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:41:28,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:41:28,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:41:28,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:41:28,706 INFO L87 Difference]: Start difference. First operand 65 states and 304 transitions. Second operand 8 states. [2019-01-20 10:41:29,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:29,386 INFO L93 Difference]: Finished difference Result 107 states and 376 transitions. [2019-01-20 10:41:29,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:41:29,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:41:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:29,388 INFO L225 Difference]: With dead ends: 107 [2019-01-20 10:41:29,389 INFO L226 Difference]: Without dead ends: 99 [2019-01-20 10:41:29,389 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:41:29,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-20 10:41:29,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-01-20 10:41:29,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-01-20 10:41:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 328 transitions. [2019-01-20 10:41:29,403 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 328 transitions. Word has length 4 [2019-01-20 10:41:29,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:29,404 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 328 transitions. [2019-01-20 10:41:29,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:41:29,404 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 328 transitions. [2019-01-20 10:41:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:41:29,405 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:29,405 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:41:29,405 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:29,405 INFO L82 PathProgramCache]: Analyzing trace with hash 930314, now seen corresponding path program 1 times [2019-01-20 10:41:29,405 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:29,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:29,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:29,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:29,407 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:29,480 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 10:41:29,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:29,481 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:29,481 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:41:29,481 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [35] [2019-01-20 10:41:29,482 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:29,482 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:30,164 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:30,164 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:41:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:30,164 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:30,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:30,165 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:30,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:30,173 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:30,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:30,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:41:30,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:41:30,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:41:30,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,401 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-20 10:41:30,536 WARN L181 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2019-01-20 10:41:30,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,548 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:41:30,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:30,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:41:30,654 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:30,694 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:30,736 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:30,781 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:30,826 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:30,872 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:30,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:30,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:41:30,931 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:41:30,935 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:41:30,939 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:41:30,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:41:30,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:41:30,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:41:30,960 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:31,040 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:31,136 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:31,342 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:31,369 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:31,388 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:31,407 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:31,424 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:31,499 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 10:41:31,499 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-20 10:41:31,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:31,543 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 135 [2019-01-20 10:41:31,545 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-20 10:41:31,773 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 12 dim-0 vars, and 2 xjuncts. [2019-01-20 10:41:31,774 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:201 [2019-01-20 10:41:31,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:31,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:31,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:31,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:31,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:31,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:31,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:31,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:31,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:31,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:31,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 12 case distinctions, treesize of input 111 treesize of output 165 [2019-01-20 10:41:31,950 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-01-20 10:41:31,966 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2019-01-20 10:41:32,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:32,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:32,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:32,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:32,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:32,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:32,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:32,997 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:41:32,998 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 126 [2019-01-20 10:41:32,999 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:33,431 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 2 dim-1 vars, End of recursive call: 49 dim-0 vars, and 8 xjuncts. [2019-01-20 10:41:33,432 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:218, output treesize:686 [2019-01-20 10:41:34,350 WARN L181 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 114 [2019-01-20 10:41:34,352 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 10:41:34,353 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:41:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:41:34,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:41:34,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-01-20 10:41:34,381 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:41:34,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:41:34,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:41:34,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-01-20 10:41:34,382 INFO L87 Difference]: Start difference. First operand 66 states and 328 transitions. Second operand 8 states. [2019-01-20 10:41:38,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:38,622 INFO L93 Difference]: Finished difference Result 155 states and 556 transitions. [2019-01-20 10:41:38,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-20 10:41:38,623 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:41:38,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:38,625 INFO L225 Difference]: With dead ends: 155 [2019-01-20 10:41:38,625 INFO L226 Difference]: Without dead ends: 152 [2019-01-20 10:41:38,626 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-20 10:41:38,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-01-20 10:41:38,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2019-01-20 10:41:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-01-20 10:41:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 438 transitions. [2019-01-20 10:41:38,643 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 438 transitions. Word has length 4 [2019-01-20 10:41:38,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:38,643 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 438 transitions. [2019-01-20 10:41:38,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:41:38,643 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 438 transitions. [2019-01-20 10:41:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:41:38,644 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:38,644 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:41:38,644 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:38,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:38,645 INFO L82 PathProgramCache]: Analyzing trace with hash 930440, now seen corresponding path program 1 times [2019-01-20 10:41:38,645 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:38,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:38,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:38,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:38,646 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:38,700 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 10:41:38,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:38,700 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:38,700 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:41:38,701 INFO L207 CegarAbsIntRunner]: [0], [6], [36], [37] [2019-01-20 10:41:38,701 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:38,701 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:38,876 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:38,876 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:41:38,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:38,876 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:38,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:38,876 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:38,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:38,885 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:38,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:38,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:38,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:41:38,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:41:38,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:41:38,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:41:38,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:41:38,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:38,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:41:38,999 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:41:39,000 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:39,079 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:39,126 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:39,162 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:39,191 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:39,216 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:39,236 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:39,255 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:39,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,303 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:41:39,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,351 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:41:39,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:41:39,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-20 10:41:39,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,548 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:41:39,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,649 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:41:39,649 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:39,689 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:39,729 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:39,771 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:39,813 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:39,851 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:39,924 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 10:41:39,925 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-20 10:41:39,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:39,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-20 10:41:39,963 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:40,032 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 10:41:40,032 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-20 10:41:40,054 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 10:41:40,055 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:41:40,066 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 10:41:40,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:41:40,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:41:40,085 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:41:40,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:41:40,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:41:40,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:41:40,085 INFO L87 Difference]: Start difference. First operand 78 states and 438 transitions. Second operand 6 states. [2019-01-20 10:41:40,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:40,430 INFO L93 Difference]: Finished difference Result 104 states and 471 transitions. [2019-01-20 10:41:40,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:41:40,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-20 10:41:40,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:40,432 INFO L225 Difference]: With dead ends: 104 [2019-01-20 10:41:40,432 INFO L226 Difference]: Without dead ends: 103 [2019-01-20 10:41:40,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-20 10:41:40,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-01-20 10:41:40,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2019-01-20 10:41:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-20 10:41:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-20 10:41:40,450 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-20 10:41:40,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:40,450 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-20 10:41:40,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:41:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-20 10:41:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:41:40,451 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:40,451 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:41:40,451 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:40,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:40,452 INFO L82 PathProgramCache]: Analyzing trace with hash 945816, now seen corresponding path program 1 times [2019-01-20 10:41:40,452 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:40,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:40,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:40,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:40,453 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:40,568 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 10:41:40,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:40,569 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:40,569 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:41:40,569 INFO L207 CegarAbsIntRunner]: [0], [22], [36], [37] [2019-01-20 10:41:40,570 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:40,570 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:40,745 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:40,746 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:41:40,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:40,746 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:40,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:40,746 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:40,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:40,754 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:40,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:40,767 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:40,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-20 10:41:40,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-20 10:41:40,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,799 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-20 10:41:40,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-20 10:41:40,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-20 10:41:40,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:40,857 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-20 10:41:40,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-20 10:41:40,877 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:40,933 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:40,975 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:41,010 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:41,038 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:41,059 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:41,078 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:41,096 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:41,137 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-20 10:41:41,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,162 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-20 10:41:41,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-20 10:41:41,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-20 10:41:41,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-20 10:41:41,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-20 10:41:41,445 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:41,479 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:41,517 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:41,556 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:41,596 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:41,639 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:41,708 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 10:41:41,709 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-20 10:41:41,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:41,743 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-20 10:41:41,744 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:41,810 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 10:41:41,810 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-20 10:41:41,829 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 10:41:41,829 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:41:41,841 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 10:41:41,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:41:41,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:41:41,861 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:41:41,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:41:41,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:41:41,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:41:41,862 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 6 states. [2019-01-20 10:41:42,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:42,193 INFO L93 Difference]: Finished difference Result 108 states and 483 transitions. [2019-01-20 10:41:42,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:41:42,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-20 10:41:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:42,195 INFO L225 Difference]: With dead ends: 108 [2019-01-20 10:41:42,195 INFO L226 Difference]: Without dead ends: 107 [2019-01-20 10:41:42,196 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-20 10:41:42,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-01-20 10:41:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2019-01-20 10:41:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-20 10:41:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-20 10:41:42,216 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-20 10:41:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:42,216 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-20 10:41:42,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:41:42,216 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-20 10:41:42,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:41:42,217 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:42,217 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:41:42,217 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:42,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:42,217 INFO L82 PathProgramCache]: Analyzing trace with hash 945008, now seen corresponding path program 1 times [2019-01-20 10:41:42,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:42,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:42,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:42,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:42,218 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:42,391 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2019-01-20 10:41:42,423 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 10:41:42,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:42,424 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:42,424 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:41:42,424 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [35] [2019-01-20 10:41:42,425 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:42,425 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:42,675 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:42,675 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:41:42,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:42,676 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:42,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:42,676 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:42,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:42,684 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:42,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:42,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,737 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:41:42,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,782 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:41:42,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:41:42,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,899 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 51 treesize of output 91 [2019-01-20 10:41:42,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:42,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:41:43,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:41:43,081 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:43,121 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:43,163 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:43,204 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:43,246 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:43,288 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:43,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:43,346 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:41:43,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:41:43,353 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:41:43,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:41:43,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:41:43,379 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:41:43,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:41:43,391 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:43,444 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:43,487 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:43,517 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:43,543 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:43,563 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:43,579 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:43,595 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:43,665 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:43,665 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:41:43,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,713 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-20 10:41:43,713 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:43,778 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:43,778 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:41:43,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:43,913 INFO L303 Elim1Store]: Index analysis took 102 ms [2019-01-20 10:41:43,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-20 10:41:43,915 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:43,988 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 10:41:43,988 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-20 10:41:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:41:44,012 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:41:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:41:44,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:41:44,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-20 10:41:44,059 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:41:44,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:41:44,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:41:44,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-01-20 10:41:44,060 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 8 states. [2019-01-20 10:41:45,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:45,847 INFO L93 Difference]: Finished difference Result 154 states and 652 transitions. [2019-01-20 10:41:45,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-20 10:41:45,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:41:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:45,852 INFO L225 Difference]: With dead ends: 154 [2019-01-20 10:41:45,852 INFO L226 Difference]: Without dead ends: 153 [2019-01-20 10:41:45,853 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:41:45,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-01-20 10:41:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2019-01-20 10:41:45,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-01-20 10:41:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 556 transitions. [2019-01-20 10:41:45,875 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 556 transitions. Word has length 4 [2019-01-20 10:41:45,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:45,875 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 556 transitions. [2019-01-20 10:41:45,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:41:45,875 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 556 transitions. [2019-01-20 10:41:45,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:41:45,876 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:45,876 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:41:45,876 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:45,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:45,876 INFO L82 PathProgramCache]: Analyzing trace with hash 945504, now seen corresponding path program 1 times [2019-01-20 10:41:45,877 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:45,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:45,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:45,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:45,878 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:46,044 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 10:41:46,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:46,044 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:46,044 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:41:46,045 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [35] [2019-01-20 10:41:46,046 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:46,046 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:46,310 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:46,310 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:41:46,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:46,311 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:46,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:46,311 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:46,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:46,320 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:46,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:46,368 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:46,372 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:41:46,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:41:46,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,392 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:41:46,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:41:46,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:41:46,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:41:46,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:41:46,434 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:46,492 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:46,538 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:46,571 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:46,598 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:46,621 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:46,638 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:46,657 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:46,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,703 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:41:46,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:41:46,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:41:46,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,858 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-20 10:41:46,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:46,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:41:47,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,038 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:41:47,039 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:47,079 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:47,118 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:47,157 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:47,197 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:47,238 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:47,309 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:47,310 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:41:47,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,355 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-20 10:41:47,356 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:47,424 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:47,425 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:41:47,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:47,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-20 10:41:47,459 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:47,530 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 10:41:47,530 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-20 10:41:47,552 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 10:41:47,552 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:41:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:41:47,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:41:47,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-20 10:41:47,602 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:41:47,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:41:47,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:41:47,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-20 10:41:47,602 INFO L87 Difference]: Start difference. First operand 92 states and 556 transitions. Second operand 8 states. [2019-01-20 10:41:48,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:48,315 INFO L93 Difference]: Finished difference Result 148 states and 688 transitions. [2019-01-20 10:41:48,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-20 10:41:48,315 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:41:48,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:48,318 INFO L225 Difference]: With dead ends: 148 [2019-01-20 10:41:48,318 INFO L226 Difference]: Without dead ends: 146 [2019-01-20 10:41:48,318 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:41:48,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-01-20 10:41:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-01-20 10:41:48,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-01-20 10:41:48,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 590 transitions. [2019-01-20 10:41:48,337 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 590 transitions. Word has length 4 [2019-01-20 10:41:48,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:48,338 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 590 transitions. [2019-01-20 10:41:48,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:41:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 590 transitions. [2019-01-20 10:41:48,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:41:48,338 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:48,339 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:41:48,339 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:48,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:48,339 INFO L82 PathProgramCache]: Analyzing trace with hash 933972, now seen corresponding path program 1 times [2019-01-20 10:41:48,339 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:48,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:48,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:48,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:48,340 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:48,462 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 10:41:48,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:48,462 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:48,462 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:41:48,462 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [35] [2019-01-20 10:41:48,463 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:48,464 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:48,715 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:48,716 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:41:48,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:48,716 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:48,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:48,716 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:48,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:48,725 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:48,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:48,777 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:48,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:41:48,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:41:48,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:41:48,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:41:48,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,853 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:41:48,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:48,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:41:48,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:41:48,878 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:48,939 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:48,986 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:49,021 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:49,051 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:49,076 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:49,097 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:49,117 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:49,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:41:49,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:41:49,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:41:49,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,335 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-20 10:41:49,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:41:49,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,521 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:41:49,522 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:49,562 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:49,602 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:49,643 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:49,685 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:49,727 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:49,797 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:49,797 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:41:49,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-20 10:41:49,849 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:49,915 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:49,915 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:41:49,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:49,947 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:41:49,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 141 [2019-01-20 10:41:49,949 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:50,016 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 10:41:50,017 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:82 [2019-01-20 10:41:50,035 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 10:41:50,036 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:41:50,057 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 10:41:50,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:41:50,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:41:50,076 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:41:50,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:41:50,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:41:50,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:41:50,077 INFO L87 Difference]: Start difference. First operand 103 states and 590 transitions. Second operand 8 states. [2019-01-20 10:41:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:50,612 INFO L93 Difference]: Finished difference Result 145 states and 646 transitions. [2019-01-20 10:41:50,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-20 10:41:50,613 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:41:50,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:50,615 INFO L225 Difference]: With dead ends: 145 [2019-01-20 10:41:50,615 INFO L226 Difference]: Without dead ends: 143 [2019-01-20 10:41:50,615 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:41:50,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-01-20 10:41:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2019-01-20 10:41:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-20 10:41:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 599 transitions. [2019-01-20 10:41:50,639 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 599 transitions. Word has length 4 [2019-01-20 10:41:50,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:50,639 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 599 transitions. [2019-01-20 10:41:50,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:41:50,640 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 599 transitions. [2019-01-20 10:41:50,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:41:50,640 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:50,640 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:41:50,641 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:50,641 INFO L82 PathProgramCache]: Analyzing trace with hash 938128, now seen corresponding path program 1 times [2019-01-20 10:41:50,641 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:50,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:50,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:50,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:50,642 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:50,715 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 10:41:50,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:50,715 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:50,715 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:41:50,715 INFO L207 CegarAbsIntRunner]: [0], [14], [36], [37] [2019-01-20 10:41:50,719 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:50,719 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:50,904 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:50,905 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:41:50,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:50,905 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:50,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:50,905 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:50,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:50,913 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:50,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:50,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:50,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-20 10:41:50,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:50,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:50,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-20 10:41:50,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:50,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:50,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:50,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-20 10:41:50,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:50,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:50,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:50,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:50,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-20 10:41:50,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:50,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:50,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:50,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:50,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:50,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-20 10:41:50,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-20 10:41:51,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-20 10:41:51,038 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:51,107 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:51,153 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:51,187 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:51,215 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:51,237 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:51,255 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:51,272 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:51,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-20 10:41:51,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-20 10:41:51,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,384 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-20 10:41:51,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-20 10:41:51,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-20 10:41:51,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-20 10:41:51,625 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:51,660 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:51,698 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:51,738 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:51,778 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:51,821 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:51,891 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 10:41:51,892 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-20 10:41:51,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:51,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-20 10:41:51,927 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:51,993 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 10:41:51,993 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-20 10:41:52,039 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 10:41:52,039 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:41:52,051 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 10:41:52,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:41:52,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:41:52,069 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:41:52,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:41:52,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:41:52,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:41:52,070 INFO L87 Difference]: Start difference. First operand 104 states and 599 transitions. Second operand 6 states. [2019-01-20 10:41:52,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:52,608 INFO L93 Difference]: Finished difference Result 124 states and 613 transitions. [2019-01-20 10:41:52,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:41:52,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-20 10:41:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:52,610 INFO L225 Difference]: With dead ends: 124 [2019-01-20 10:41:52,610 INFO L226 Difference]: Without dead ends: 123 [2019-01-20 10:41:52,611 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-20 10:41:52,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-01-20 10:41:52,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2019-01-20 10:41:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-20 10:41:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-01-20 10:41:52,628 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 4 [2019-01-20 10:41:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:52,628 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-01-20 10:41:52,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:41:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-01-20 10:41:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:41:52,629 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:52,629 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:41:52,629 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:52,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:52,630 INFO L82 PathProgramCache]: Analyzing trace with hash 937816, now seen corresponding path program 1 times [2019-01-20 10:41:52,630 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:52,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:52,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:52,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:52,630 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:52,914 WARN L181 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-01-20 10:41:52,985 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 10:41:52,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:52,985 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:52,986 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:41:52,986 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [35] [2019-01-20 10:41:52,987 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:52,987 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:53,244 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:53,245 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-20 10:41:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:53,245 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:53,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:53,245 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:53,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:53,253 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:53,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:53,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:53,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:41:53,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:41:53,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,324 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:41:53,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:41:53,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,346 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:41:53,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:41:53,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:41:53,375 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:53,435 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:53,480 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:53,515 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:53,546 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:53,570 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:53,591 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:53,608 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:53,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:41:53,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:41:53,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,754 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:41:53,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-20 10:41:53,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:53,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:41:54,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:41:54,014 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:54,054 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:54,095 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:54,135 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:54,176 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:54,216 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:54,286 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:54,287 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:41:54,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,389 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-20 10:41:54,389 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:54,453 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:41:54,453 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-20 10:41:54,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:54,572 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-20 10:41:54,573 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:54,772 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 10:41:54,772 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-20 10:41:54,794 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 10:41:54,794 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:41:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:41:54,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:41:54,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-20 10:41:54,842 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:41:54,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:41:54,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:41:54,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-20 10:41:54,843 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 8 states. [2019-01-20 10:41:55,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:55,767 INFO L93 Difference]: Finished difference Result 176 states and 800 transitions. [2019-01-20 10:41:55,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-20 10:41:55,768 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:41:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:55,770 INFO L225 Difference]: With dead ends: 176 [2019-01-20 10:41:55,770 INFO L226 Difference]: Without dead ends: 174 [2019-01-20 10:41:55,770 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-01-20 10:41:55,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-01-20 10:41:55,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2019-01-20 10:41:55,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-20 10:41:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-20 10:41:55,797 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-20 10:41:55,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:55,797 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-20 10:41:55,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:41:55,798 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-20 10:41:55,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:41:55,798 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:55,798 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:41:55,799 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:55,799 INFO L82 PathProgramCache]: Analyzing trace with hash 953504, now seen corresponding path program 1 times [2019-01-20 10:41:55,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:55,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:55,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:55,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:55,800 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:55,830 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 10:41:55,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:55,830 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:55,830 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:41:55,831 INFO L207 CegarAbsIntRunner]: [0], [30], [36], [37] [2019-01-20 10:41:55,831 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:55,831 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:56,076 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:56,077 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:41:56,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:56,077 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:56,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:56,077 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:56,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:56,085 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:56,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:56,095 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-20 10:41:56,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-20 10:41:56,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,194 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-20 10:41:56,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-20 10:41:56,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-20 10:41:56,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:56,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-20 10:41:56,431 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:56,469 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:56,507 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:56,547 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:56,586 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:56,628 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:56,676 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:56,685 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-20 10:41:56,689 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-20 10:41:56,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-20 10:41:56,697 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-20 10:41:56,703 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-20 10:41:56,708 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-20 10:41:56,722 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-20 10:41:56,723 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:56,776 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:56,815 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:56,843 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:56,866 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:56,885 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:56,901 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:56,916 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:56,982 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 10:41:56,982 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-20 10:41:57,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:57,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-20 10:41:57,020 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:57,080 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 10:41:57,080 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-20 10:41:57,129 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 10:41:57,129 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:41:57,138 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 10:41:57,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:41:57,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:41:57,156 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:41:57,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:41:57,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:41:57,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:41:57,157 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 6 states. [2019-01-20 10:41:57,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:41:57,496 INFO L93 Difference]: Finished difference Result 135 states and 696 transitions. [2019-01-20 10:41:57,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:41:57,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-20 10:41:57,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:41:57,499 INFO L225 Difference]: With dead ends: 135 [2019-01-20 10:41:57,499 INFO L226 Difference]: Without dead ends: 134 [2019-01-20 10:41:57,500 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-20 10:41:57,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-01-20 10:41:57,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2019-01-20 10:41:57,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-20 10:41:57,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-20 10:41:57,527 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-20 10:41:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:41:57,527 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-20 10:41:57,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:41:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-20 10:41:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-20 10:41:57,528 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:41:57,528 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-20 10:41:57,528 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:41:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash 29600478, now seen corresponding path program 1 times [2019-01-20 10:41:57,529 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:41:57,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:57,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:57,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:41:57,530 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:41:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:57,769 WARN L181 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2019-01-20 10:41:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:41:57,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:57,953 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:41:57,953 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-20 10:41:57,953 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [35] [2019-01-20 10:41:57,954 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:41:57,954 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:41:58,671 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:41:58,672 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-20 10:41:58,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:41:58,672 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:41:58,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:41:58,672 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:41:58,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:41:58,680 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:41:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:41:58,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:41:58,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:41:58,741 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:41:58,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:41:58,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:41:58,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,766 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:41:58,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:41:58,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,785 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:41:58,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:58,799 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:41:58,800 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:58,880 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:58,927 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:58,962 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:58,993 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:59,019 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:59,040 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:59,058 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:59,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,110 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 10:41:59,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,170 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 10:41:59,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,236 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 10:41:59,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,309 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 10:41:59,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,400 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 10:41:59,503 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-20 10:41:59,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,518 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 10:41:59,658 WARN L181 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:41:59,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:41:59,676 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 10:41:59,677 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:41:59,736 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:59,795 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:59,853 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:59,912 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:41:59,976 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:00,038 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:00,137 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-20 10:42:00,137 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-20 10:42:00,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,177 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 10:42:00,177 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:00,275 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:42:00,276 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-20 10:42:00,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,320 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:42:00,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-20 10:42:00,322 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:00,416 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 10:42:00,417 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-20 10:42:00,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:00,465 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 169 [2019-01-20 10:42:00,466 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:00,559 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 10:42:00,559 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:89 [2019-01-20 10:42:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:42:00,586 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:42:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:42:00,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:42:00,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-20 10:42:00,643 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:42:00,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-20 10:42:00,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-20 10:42:00,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-01-20 10:42:00,643 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 10 states. [2019-01-20 10:42:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:42:01,824 INFO L93 Difference]: Finished difference Result 212 states and 968 transitions. [2019-01-20 10:42:01,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-20 10:42:01,824 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-20 10:42:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:42:01,827 INFO L225 Difference]: With dead ends: 212 [2019-01-20 10:42:01,827 INFO L226 Difference]: Without dead ends: 205 [2019-01-20 10:42:01,828 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-20 10:42:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-01-20 10:42:01,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2019-01-20 10:42:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-01-20 10:42:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 789 transitions. [2019-01-20 10:42:01,862 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 789 transitions. Word has length 5 [2019-01-20 10:42:01,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:42:01,863 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 789 transitions. [2019-01-20 10:42:01,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-20 10:42:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 789 transitions. [2019-01-20 10:42:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-20 10:42:01,864 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:42:01,864 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-20 10:42:01,864 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:42:01,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:42:01,865 INFO L82 PathProgramCache]: Analyzing trace with hash 29600106, now seen corresponding path program 1 times [2019-01-20 10:42:01,865 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:42:01,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:42:01,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:42:01,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:42:01,866 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:42:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:42:02,259 WARN L181 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-01-20 10:42:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:42:02,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:42:02,291 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:42:02,291 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-20 10:42:02,291 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [35] [2019-01-20 10:42:02,292 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:42:02,292 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:42:03,013 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:42:03,013 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-20 10:42:03,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:42:03,014 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:42:03,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:42:03,014 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:42:03,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:42:03,024 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:42:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:42:03,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:42:03,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,088 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 10:42:03,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,144 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 10:42:03,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,208 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 10:42:03,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,286 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 10:42:03,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,388 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 10:42:03,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,514 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 10:42:03,638 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:42:03,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:03,670 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 10:42:03,670 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:03,735 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:03,805 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:03,879 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:03,956 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:04,030 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:04,108 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:04,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:42:04,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:42:04,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:42:04,207 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:42:04,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:42:04,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:42:04,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:42:04,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:42:04,223 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:04,297 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:04,340 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:04,373 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:04,400 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:04,420 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:04,439 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:04,456 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:04,555 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-20 10:42:04,555 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-20 10:42:04,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,609 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 10:42:04,609 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:04,705 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:42:04,705 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-20 10:42:04,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,754 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:42:04,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-20 10:42:04,756 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:04,854 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 10:42:04,855 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-20 10:42:04,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:04,902 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:42:04,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-20 10:42:04,904 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:05,011 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 10:42:05,011 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-20 10:42:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:42:05,248 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:42:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:42:05,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:42:05,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-20 10:42:05,318 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:42:05,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-20 10:42:05,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-20 10:42:05,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-20 10:42:05,319 INFO L87 Difference]: Start difference. First operand 122 states and 789 transitions. Second operand 10 states. [2019-01-20 10:42:06,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:42:06,897 INFO L93 Difference]: Finished difference Result 169 states and 850 transitions. [2019-01-20 10:42:06,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-20 10:42:06,897 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-20 10:42:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:42:06,899 INFO L225 Difference]: With dead ends: 169 [2019-01-20 10:42:06,900 INFO L226 Difference]: Without dead ends: 168 [2019-01-20 10:42:06,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-20 10:42:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-01-20 10:42:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2019-01-20 10:42:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-01-20 10:42:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 762 transitions. [2019-01-20 10:42:06,934 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 762 transitions. Word has length 5 [2019-01-20 10:42:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:42:06,934 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 762 transitions. [2019-01-20 10:42:06,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-20 10:42:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 762 transitions. [2019-01-20 10:42:06,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-20 10:42:06,935 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:42:06,935 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-20 10:42:06,935 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:42:06,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:42:06,935 INFO L82 PathProgramCache]: Analyzing trace with hash 29600602, now seen corresponding path program 1 times [2019-01-20 10:42:06,935 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:42:06,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:42:06,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:42:06,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:42:06,936 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:42:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:42:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:42:07,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:42:07,068 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:42:07,068 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-20 10:42:07,068 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [35] [2019-01-20 10:42:07,069 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:42:07,069 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:42:07,811 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:42:07,811 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-20 10:42:07,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:42:07,812 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:42:07,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:42:07,812 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:42:07,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:42:07,820 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:42:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:42:07,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:42:07,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:07,874 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 10:42:07,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:07,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:07,931 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 10:42:07,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:07,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:07,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:07,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:07,995 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 10:42:08,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,070 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 10:42:08,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 10:42:08,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,276 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 10:42:08,403 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:42:08,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:08,419 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 10:42:08,420 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:08,480 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:08,540 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:08,605 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:08,669 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:08,733 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:08,796 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:08,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:42:08,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:42:08,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:42:08,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:42:08,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:42:08,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:42:08,898 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:42:08,902 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-20 10:42:08,903 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:08,979 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:09,024 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:09,058 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:09,093 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:09,115 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:09,134 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:09,150 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:09,251 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-20 10:42:09,251 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-20 10:42:09,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,294 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 10:42:09,294 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:09,392 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:42:09,392 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-20 10:42:09,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,438 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:42:09,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-20 10:42:09,440 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:09,540 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 10:42:09,540 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-20 10:42:09,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:09,604 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:42:09,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-20 10:42:09,606 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:09,704 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 10:42:09,705 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-20 10:42:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:42:09,786 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:42:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:42:09,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:42:09,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-20 10:42:09,845 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:42:09,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-20 10:42:09,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-20 10:42:09,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-20 10:42:09,846 INFO L87 Difference]: Start difference. First operand 119 states and 762 transitions. Second operand 10 states. [2019-01-20 10:42:11,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:42:11,638 INFO L93 Difference]: Finished difference Result 176 states and 845 transitions. [2019-01-20 10:42:11,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-20 10:42:11,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-20 10:42:11,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:42:11,641 INFO L225 Difference]: With dead ends: 176 [2019-01-20 10:42:11,641 INFO L226 Difference]: Without dead ends: 172 [2019-01-20 10:42:11,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-20 10:42:11,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-01-20 10:42:11,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-01-20 10:42:11,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-01-20 10:42:11,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 788 transitions. [2019-01-20 10:42:11,667 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 788 transitions. Word has length 5 [2019-01-20 10:42:11,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:42:11,667 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 788 transitions. [2019-01-20 10:42:11,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-20 10:42:11,667 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 788 transitions. [2019-01-20 10:42:11,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-20 10:42:11,667 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:42:11,668 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-20 10:42:11,668 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:42:11,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:42:11,668 INFO L82 PathProgramCache]: Analyzing trace with hash 29588822, now seen corresponding path program 1 times [2019-01-20 10:42:11,668 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:42:11,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:42:11,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:42:11,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:42:11,669 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:42:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:42:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:42:11,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:42:11,790 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:42:11,790 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-20 10:42:11,790 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [35] [2019-01-20 10:42:11,791 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-20 10:42:11,791 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:42:12,509 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:42:12,510 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-20 10:42:12,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:42:12,510 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:42:12,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:42:12,510 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-20 10:42:12,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:42:12,518 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:42:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:42:12,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:42:12,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-20 10:42:12,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-20 10:42:12,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,669 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-20 10:42:12,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-20 10:42:12,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,815 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-20 10:42:12,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:12,923 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-20 10:42:12,924 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:12,967 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:13,010 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:13,052 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:13,098 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:13,151 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:13,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-20 10:42:13,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-20 10:42:13,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-20 10:42:13,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-20 10:42:13,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-20 10:42:13,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-20 10:42:13,269 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-20 10:42:13,279 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-20 10:42:13,280 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:13,336 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:13,382 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:13,416 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:13,440 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:13,462 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:13,478 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:13,495 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:42:13,569 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-20 10:42:13,570 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-20 10:42:13,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:13,687 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-20 10:42:13,687 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-20 10:42:13,726 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-20 10:42:15,325 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-20 10:42:15,325 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:822 [2019-01-20 10:42:20,498 WARN L181 SmtUtils]: Spent 4.93 s on a formula simplification. DAG size of input: 422 DAG size of output: 162 [2019-01-20 10:42:20,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,511 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:42:20,511 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 150 [2019-01-20 10:42:20,512 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:20,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 142 [2019-01-20 10:42:20,751 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:20,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:20,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 158 [2019-01-20 10:42:20,984 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:21,186 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-01-20 10:42:21,186 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:329, output treesize:277 [2019-01-20 10:42:21,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,341 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 156 [2019-01-20 10:42:21,342 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:21,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,578 INFO L683 Elim1Store]: detected equality via solver [2019-01-20 10:42:21,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 173 [2019-01-20 10:42:21,580 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:21,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:42:21,794 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 162 [2019-01-20 10:42:21,795 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-20 10:42:21,977 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-20 10:42:21,978 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:237 [2019-01-20 10:42:22,412 WARN L181 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-01-20 10:42:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:42:22,415 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:42:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:42:22,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:42:22,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-01-20 10:42:22,456 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:42:22,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-20 10:42:22,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-20 10:42:22,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-01-20 10:42:22,457 INFO L87 Difference]: Start difference. First operand 125 states and 788 transitions. Second operand 10 states. [2019-01-20 10:42:23,020 WARN L181 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 114 [2019-01-20 10:42:37,425 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-01-20 10:42:37,426 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) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:652) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:256) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:715) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2019-01-20 10:42:37,430 INFO L168 Benchmark]: Toolchain (without parser) took 169135.04 ms. Allocated memory was 140.0 MB in the beginning and 669.5 MB in the end (delta: 529.5 MB). Free memory was 106.0 MB in the beginning and 279.6 MB in the end (delta: -173.6 MB). Peak memory consumption was 355.9 MB. Max. memory is 7.1 GB. [2019-01-20 10:42:37,431 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory is still 107.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-20 10:42:37,431 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.73 ms. Allocated memory is still 140.0 MB. Free memory was 106.0 MB in the beginning and 103.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-01-20 10:42:37,431 INFO L168 Benchmark]: Boogie Preprocessor took 26.42 ms. Allocated memory is still 140.0 MB. Free memory was 103.6 MB in the beginning and 102.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-20 10:42:37,432 INFO L168 Benchmark]: RCFGBuilder took 518.26 ms. Allocated memory is still 140.0 MB. Free memory was 102.3 MB in the beginning and 89.4 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2019-01-20 10:42:37,432 INFO L168 Benchmark]: TraceAbstraction took 168529.66 ms. Allocated memory was 140.0 MB in the beginning and 669.5 MB in the end (delta: 529.5 MB). Free memory was 89.2 MB in the beginning and 279.6 MB in the end (delta: -190.4 MB). Peak memory consumption was 339.1 MB. Max. memory is 7.1 GB. [2019-01-20 10:42:37,434 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory is still 107.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 56.73 ms. Allocated memory is still 140.0 MB. Free memory was 106.0 MB in the beginning and 103.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.42 ms. Allocated memory is still 140.0 MB. Free memory was 103.6 MB in the beginning and 102.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 518.26 ms. Allocated memory is still 140.0 MB. Free memory was 102.3 MB in the beginning and 89.4 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 168529.66 ms. Allocated memory was 140.0 MB in the beginning and 669.5 MB in the end (delta: 529.5 MB). Free memory was 89.2 MB in the beginning and 279.6 MB in the end (delta: -190.4 MB). Peak memory consumption was 339.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...