java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b7bd044-m [2019-01-18 17:39:00,002 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-18 17:39:00,004 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-18 17:39:00,021 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-18 17:39:00,021 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-18 17:39:00,023 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-18 17:39:00,024 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-18 17:39:00,027 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-18 17:39:00,030 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-18 17:39:00,038 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-18 17:39:00,038 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-18 17:39:00,062 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-01-18 17:39:00,085 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-18 17:39:00,085 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-18 17:39:00,086 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-18 17:39:00,086 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-18 17:39:00,086 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-18 17:39:00,086 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-18 17:39:00,087 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-18 17:39:00,087 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-18 17:39:00,087 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-18 17:39:00,087 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-18 17:39:00,087 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-18 17:39:00,088 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-18 17:39:00,088 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-18 17:39:00,088 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-18 17:39:00,089 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-18 17:39:00,090 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-18 17:39:00,091 INFO L133 SettingsManager]: * Use SBE=true [2019-01-18 17:39:00,091 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-18 17:39:00,091 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-18 17:39:00,091 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-18 17:39:00,091 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-18 17:39:00,092 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-18 17:39:00,094 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-18 17:39:00,095 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-18 17:39:00,095 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-18 17:39:00,095 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-18 17:39:00,095 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-18 17:39:00,095 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-18 17:39:00,095 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-18 17:39:00,096 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-18 17:39:00,096 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-18 17:39:00,096 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-18 17:39:00,096 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-18 17:39:00,096 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-18 17:39:00,097 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-18 17:39:00,097 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-18 17:39:00,097 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-18 17:39:00,098 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-18 17:39:00,098 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-18 17:39:00,098 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-18 17:39:00,142 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-18 17:39:00,155 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-18 17:39:00,158 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-18 17:39:00,159 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-18 17:39:00,160 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-18 17:39:00,161 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-unlimited.bpl [2019-01-18 17:39:00,161 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-unlimited.bpl' [2019-01-18 17:39:00,200 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-18 17:39:00,202 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-18 17:39:00,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-18 17:39:00,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-18 17:39:00,203 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-18 17:39:00,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:00" (1/1) ... [2019-01-18 17:39:00,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:00" (1/1) ... [2019-01-18 17:39:00,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-18 17:39:00,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-18 17:39:00,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-18 17:39:00,256 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-18 17:39:00,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:00" (1/1) ... [2019-01-18 17:39:00,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:00" (1/1) ... [2019-01-18 17:39:00,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:00" (1/1) ... [2019-01-18 17:39:00,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:00" (1/1) ... [2019-01-18 17:39:00,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:00" (1/1) ... [2019-01-18 17:39:00,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:00" (1/1) ... [2019-01-18 17:39:00,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:00" (1/1) ... [2019-01-18 17:39:00,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-18 17:39:00,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-18 17:39:00,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-18 17:39:00,280 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-18 17:39:00,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:00" (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 [2019-01-18 17:39:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-18 17:39:00,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-18 17:39:00,811 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-18 17:39:00,812 INFO L286 CfgBuilder]: Removed 15 assue(true) statements. [2019-01-18 17:39:00,813 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:39:00 BoogieIcfgContainer [2019-01-18 17:39:00,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-18 17:39:00,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-18 17:39:00,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-18 17:39:00,817 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-18 17:39:00,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:39:00" (1/2) ... [2019-01-18 17:39:00,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff0aac0 and model type speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:39:00, skipping insertion in model container [2019-01-18 17:39:00,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:39:00" (2/2) ... [2019-01-18 17:39:00,821 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-6-unlimited.bpl [2019-01-18 17:39:00,831 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-18 17:39:00,839 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-01-18 17:39:00,857 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-01-18 17:39:00,887 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-18 17:39:00,888 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-18 17:39:00,888 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-18 17:39:00,888 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-18 17:39:00,888 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-18 17:39:00,888 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-18 17:39:00,889 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-18 17:39:00,889 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-18 17:39:00,901 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-01-18 17:39:00,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-18 17:39:00,907 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:00,908 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-18 17:39:00,911 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:00,915 INFO L82 PathProgramCache]: Analyzing trace with hash 988, now seen corresponding path program 1 times [2019-01-18 17:39:00,917 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:00,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:00,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:00,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:00,960 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:01,102 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 17:39:01,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-18 17:39:01,102 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:39:01,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-18 17:39:01,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-18 17:39:01,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 17:39:01,118 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-01-18 17:39:01,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:01,303 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2019-01-18 17:39:01,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 17:39:01,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-18 17:39:01,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:01,319 INFO L225 Difference]: With dead ends: 29 [2019-01-18 17:39:01,319 INFO L226 Difference]: Without dead ends: 24 [2019-01-18 17:39:01,322 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 [2019-01-18 17:39:01,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-01-18 17:39:01,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2019-01-18 17:39:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-01-18 17:39:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 25 transitions. [2019-01-18 17:39:01,358 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 25 transitions. Word has length 2 [2019-01-18 17:39:01,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:01,359 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 25 transitions. [2019-01-18 17:39:01,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-18 17:39:01,359 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 25 transitions. [2019-01-18 17:39:01,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:01,360 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:01,360 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:01,361 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:01,361 INFO L82 PathProgramCache]: Analyzing trace with hash 30376, now seen corresponding path program 1 times [2019-01-18 17:39:01,361 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:01,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:01,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:01,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:01,363 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:01,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:01,625 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:01,626 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:39:01,630 INFO L207 CegarAbsIntRunner]: [0], [18], [27] [2019-01-18 17:39:01,687 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:01,687 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:01,760 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:01,760 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:39:01,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:01,766 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:01,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:01,766 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 [2019-01-18 17:39:01,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:01,778 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:01,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:01,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:01,945 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 48 treesize of output 54 [2019-01-18 17:39:02,208 WARN L181 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-01-18 17:39:02,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:02,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:02,224 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 41 treesize of output 53 [2019-01-18 17:39:02,413 WARN L181 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2019-01-18 17:39:02,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:02,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:02,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:02,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:02,433 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 32 treesize of output 61 [2019-01-18 17:39:02,655 WARN L181 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2019-01-18 17:39:02,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:02,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:02,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:02,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:02,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:02,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:02,687 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:02,690 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:02,736 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:02,775 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:02,817 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:02,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:39:02,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 30 [2019-01-18 17:39:02,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:39:02,950 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:02,960 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 30 treesize of output 72 [2019-01-18 17:39:03,080 INFO L303 Elim1Store]: Index analysis took 116 ms [2019-01-18 17:39:03,083 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:03,084 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:03,279 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:03,332 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:03,349 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:03,362 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:03,377 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:03,418 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. [2019-01-18 17:39:03,419 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:03,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:03,508 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 17:39:03,512 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:03,550 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:03,550 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2019-01-18 17:39:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:03,645 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:03,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:03,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:39:03,729 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:03,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:39:03,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:39:03,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:03,730 INFO L87 Difference]: Start difference. First operand 14 states and 25 transitions. Second operand 6 states. [2019-01-18 17:39:04,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:04,230 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2019-01-18 17:39:04,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:39:04,231 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 17:39:04,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:04,233 INFO L225 Difference]: With dead ends: 47 [2019-01-18 17:39:04,233 INFO L226 Difference]: Without dead ends: 45 [2019-01-18 17:39:04,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:39:04,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-01-18 17:39:04,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 18. [2019-01-18 17:39:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-01-18 17:39:04,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 37 transitions. [2019-01-18 17:39:04,247 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 37 transitions. Word has length 3 [2019-01-18 17:39:04,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:04,248 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 37 transitions. [2019-01-18 17:39:04,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:39:04,248 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 37 transitions. [2019-01-18 17:39:04,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:04,248 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:04,249 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:04,249 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:04,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:04,249 INFO L82 PathProgramCache]: Analyzing trace with hash 30004, now seen corresponding path program 1 times [2019-01-18 17:39:04,250 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:04,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:04,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:04,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:04,252 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:04,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:04,423 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:04,423 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:39:04,423 INFO L207 CegarAbsIntRunner]: [0], [6], [27] [2019-01-18 17:39:04,428 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:04,428 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:04,438 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:04,438 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:39:04,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:04,439 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:04,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:04,439 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 [2019-01-18 17:39:04,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:04,448 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:04,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:04,494 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 21 treesize of output 24 [2019-01-18 17:39:04,498 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 24 treesize of output 30 [2019-01-18 17:39:04,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,541 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 26 treesize of output 40 [2019-01-18 17:39:04,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,557 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 28 treesize of output 54 [2019-01-18 17:39:04,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,580 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 30 treesize of output 72 [2019-01-18 17:39:04,605 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:04,606 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:04,661 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:04,690 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:04,707 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:04,721 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:04,760 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:04,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,806 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 48 treesize of output 54 [2019-01-18 17:39:04,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,869 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 41 treesize of output 53 [2019-01-18 17:39:04,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,915 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 32 treesize of output 61 [2019-01-18 17:39:04,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:04,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:04,979 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:04,999 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:05,024 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:05,042 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:05,077 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. [2019-01-18 17:39:05,077 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:05,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:05,166 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:39:05,166 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:05,204 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:05,205 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2019-01-18 17:39:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:05,277 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:05,311 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-18 17:39:05,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-18 17:39:05,311 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:39:05,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 17:39:05,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 17:39:05,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 17:39:05,312 INFO L87 Difference]: Start difference. First operand 18 states and 37 transitions. Second operand 4 states. [2019-01-18 17:39:05,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:05,374 INFO L93 Difference]: Finished difference Result 23 states and 60 transitions. [2019-01-18 17:39:05,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 17:39:05,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-18 17:39:05,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:05,376 INFO L225 Difference]: With dead ends: 23 [2019-01-18 17:39:05,376 INFO L226 Difference]: Without dead ends: 22 [2019-01-18 17:39:05,376 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 17:39:05,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-01-18 17:39:05,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-01-18 17:39:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-01-18 17:39:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 59 transitions. [2019-01-18 17:39:05,384 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 59 transitions. Word has length 3 [2019-01-18 17:39:05,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:05,385 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 59 transitions. [2019-01-18 17:39:05,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 17:39:05,385 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 59 transitions. [2019-01-18 17:39:05,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:05,386 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:05,386 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:05,386 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:05,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:05,387 INFO L82 PathProgramCache]: Analyzing trace with hash 30562, now seen corresponding path program 1 times [2019-01-18 17:39:05,387 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:05,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:05,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:05,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:05,388 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:05,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:05,473 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:05,473 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:39:05,473 INFO L207 CegarAbsIntRunner]: [0], [24], [27] [2019-01-18 17:39:05,475 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:05,475 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:05,482 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:05,483 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:39:05,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:05,483 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:05,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:05,484 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 [2019-01-18 17:39:05,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:05,493 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:05,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:05,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:05,588 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 68 treesize of output 71 [2019-01-18 17:39:05,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:05,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:05,644 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 58 treesize of output 67 [2019-01-18 17:39:05,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:05,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:05,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:05,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:05,837 INFO L303 Elim1Store]: Index analysis took 107 ms [2019-01-18 17:39:05,838 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-18 17:39:05,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:05,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:05,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:05,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:05,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:05,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:05,929 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 37 treesize of output 80 [2019-01-18 17:39:06,050 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2019-01-18 17:39:06,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:06,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:06,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:06,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:06,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:06,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:06,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:06,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:06,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:39:06,073 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:06,102 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:06,128 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:06,153 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:06,195 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:06,278 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 21 treesize of output 24 [2019-01-18 17:39:06,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:39:06,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:39:06,291 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:06,307 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:39:06,314 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:39:06,314 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:06,365 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:06,385 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:06,402 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:06,543 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:06,555 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:06,612 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. [2019-01-18 17:39:06,613 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:92, output treesize:91 [2019-01-18 17:39:06,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:06,669 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:39:06,670 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:06,724 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. [2019-01-18 17:39:06,724 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:06,743 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:06,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:06,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:39:06,777 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:06,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:39:06,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:39:06,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:06,778 INFO L87 Difference]: Start difference. First operand 21 states and 59 transitions. Second operand 6 states. [2019-01-18 17:39:06,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:06,955 INFO L93 Difference]: Finished difference Result 39 states and 79 transitions. [2019-01-18 17:39:06,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 17:39:06,955 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 17:39:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:06,957 INFO L225 Difference]: With dead ends: 39 [2019-01-18 17:39:06,957 INFO L226 Difference]: Without dead ends: 36 [2019-01-18 17:39:06,960 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:06,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-18 17:39:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2019-01-18 17:39:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-01-18 17:39:06,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 67 transitions. [2019-01-18 17:39:06,968 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 67 transitions. Word has length 3 [2019-01-18 17:39:06,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:06,968 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 67 transitions. [2019-01-18 17:39:06,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:39:06,968 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 67 transitions. [2019-01-18 17:39:06,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 17:39:06,969 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:06,969 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 17:39:06,969 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:06,970 INFO L82 PathProgramCache]: Analyzing trace with hash 30128, now seen corresponding path program 1 times [2019-01-18 17:39:06,970 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:06,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:06,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:06,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:06,972 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:07,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:07,094 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:07,094 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 17:39:07,094 INFO L207 CegarAbsIntRunner]: [0], [10], [27] [2019-01-18 17:39:07,096 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:07,096 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:07,110 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:07,110 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 2. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:39:07,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:07,110 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:07,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:07,111 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 [2019-01-18 17:39:07,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:07,119 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:07,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:07,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:39:07,181 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 24 treesize of output 30 [2019-01-18 17:39:07,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,191 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 26 treesize of output 40 [2019-01-18 17:39:07,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:07,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,242 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 30 treesize of output 72 [2019-01-18 17:39:07,374 INFO L303 Elim1Store]: Index analysis took 129 ms [2019-01-18 17:39:07,375 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:07,376 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:07,485 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:07,505 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:07,528 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:07,541 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:07,554 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:07,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,585 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 48 treesize of output 54 [2019-01-18 17:39:07,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,618 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 41 treesize of output 53 [2019-01-18 17:39:07,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,670 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 32 treesize of output 61 [2019-01-18 17:39:07,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,725 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:07,725 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:07,742 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:07,757 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:07,773 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:07,808 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. [2019-01-18 17:39:07,809 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:07,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:07,852 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:39:07,853 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:07,882 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:07,883 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2019-01-18 17:39:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:07,914 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:07,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:07,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:39:07,947 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:07,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:39:07,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:39:07,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:07,948 INFO L87 Difference]: Start difference. First operand 23 states and 67 transitions. Second operand 6 states. [2019-01-18 17:39:08,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:08,137 INFO L93 Difference]: Finished difference Result 49 states and 101 transitions. [2019-01-18 17:39:08,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:39:08,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 17:39:08,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:08,139 INFO L225 Difference]: With dead ends: 49 [2019-01-18 17:39:08,139 INFO L226 Difference]: Without dead ends: 47 [2019-01-18 17:39:08,139 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 [2019-01-18 17:39:08,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-01-18 17:39:08,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 25. [2019-01-18 17:39:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-18 17:39:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 80 transitions. [2019-01-18 17:39:08,146 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 80 transitions. Word has length 3 [2019-01-18 17:39:08,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:08,146 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 80 transitions. [2019-01-18 17:39:08,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:39:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 80 transitions. [2019-01-18 17:39:08,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:08,147 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:08,147 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:08,147 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:08,147 INFO L82 PathProgramCache]: Analyzing trace with hash 941528, now seen corresponding path program 1 times [2019-01-18 17:39:08,147 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:08,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:08,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:08,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:08,149 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:08,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:08,299 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:08,299 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:08,299 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [27] [2019-01-18 17:39:08,301 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:08,301 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:08,306 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:08,306 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:08,307 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:08,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:08,307 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 [2019-01-18 17:39:08,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:08,318 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:08,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:08,350 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 21 treesize of output 24 [2019-01-18 17:39:08,353 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 24 treesize of output 30 [2019-01-18 17:39:08,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,357 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 26 treesize of output 40 [2019-01-18 17:39:08,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,363 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 28 treesize of output 54 [2019-01-18 17:39:08,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,393 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 30 treesize of output 72 [2019-01-18 17:39:08,420 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:08,421 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:08,450 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:08,501 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:08,519 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:08,534 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:08,548 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:08,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,578 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 48 treesize of output 54 [2019-01-18 17:39:08,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,614 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 41 treesize of output 53 [2019-01-18 17:39:08,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,652 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 32 treesize of output 61 [2019-01-18 17:39:08,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,701 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:08,702 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:08,720 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:08,738 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:08,755 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:08,789 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:08,790 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:08,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,836 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 17:39:08,836 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:08,869 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:08,869 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 17:39:08,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:08,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-01-18 17:39:08,958 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:08,994 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:08,995 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-01-18 17:39:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:09,014 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:09,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:09,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:39:09,061 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:09,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:09,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:09,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:39:09,061 INFO L87 Difference]: Start difference. First operand 25 states and 80 transitions. Second operand 8 states. [2019-01-18 17:39:09,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:09,682 INFO L93 Difference]: Finished difference Result 61 states and 138 transitions. [2019-01-18 17:39:09,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:39:09,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:39:09,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:09,684 INFO L225 Difference]: With dead ends: 61 [2019-01-18 17:39:09,685 INFO L226 Difference]: Without dead ends: 57 [2019-01-18 17:39:09,685 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 [2019-01-18 17:39:09,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-01-18 17:39:09,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2019-01-18 17:39:09,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-18 17:39:09,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 98 transitions. [2019-01-18 17:39:09,693 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 98 transitions. Word has length 4 [2019-01-18 17:39:09,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:09,694 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 98 transitions. [2019-01-18 17:39:09,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 98 transitions. [2019-01-18 17:39:09,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:09,695 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:09,695 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:09,695 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:09,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:09,695 INFO L82 PathProgramCache]: Analyzing trace with hash 941590, now seen corresponding path program 1 times [2019-01-18 17:39:09,695 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:09,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:09,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:09,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:09,696 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:09,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:09,787 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:09,787 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:09,787 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [27] [2019-01-18 17:39:09,788 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:09,788 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:09,794 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:09,794 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:09,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:09,794 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:09,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:09,795 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 [2019-01-18 17:39:09,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:09,803 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:09,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:09,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:09,837 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 68 treesize of output 71 [2019-01-18 17:39:09,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:09,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:09,877 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 58 treesize of output 67 [2019-01-18 17:39:09,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:09,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:09,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:09,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:09,951 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 46 treesize of output 72 [2019-01-18 17:39:10,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,007 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 37 treesize of output 80 [2019-01-18 17:39:10,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,079 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:39:10,080 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:10,104 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:10,131 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:10,156 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:10,184 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:10,225 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 21 treesize of output 24 [2019-01-18 17:39:10,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:39:10,234 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:39:10,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:10,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:39:10,250 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:39:10,251 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:10,288 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:10,306 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:10,322 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:10,335 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:10,346 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:10,394 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:10,395 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 17:39:10,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,488 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-18 17:39:10,489 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:10,550 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:10,550 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:10,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:10,588 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:10,590 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-01-18 17:39:10,591 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:10,635 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. [2019-01-18 17:39:10,635 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-18 17:39:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:10,655 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:10,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:10,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:39:10,699 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:10,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:10,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:10,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:39:10,700 INFO L87 Difference]: Start difference. First operand 29 states and 98 transitions. Second operand 8 states. [2019-01-18 17:39:11,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:11,242 INFO L93 Difference]: Finished difference Result 59 states and 140 transitions. [2019-01-18 17:39:11,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:39:11,243 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:39:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:11,244 INFO L225 Difference]: With dead ends: 59 [2019-01-18 17:39:11,244 INFO L226 Difference]: Without dead ends: 55 [2019-01-18 17:39:11,245 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 [2019-01-18 17:39:11,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-01-18 17:39:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2019-01-18 17:39:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-18 17:39:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 110 transitions. [2019-01-18 17:39:11,254 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 110 transitions. Word has length 4 [2019-01-18 17:39:11,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:11,254 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 110 transitions. [2019-01-18 17:39:11,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:11,255 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 110 transitions. [2019-01-18 17:39:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:11,255 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:11,255 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:11,256 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:11,256 INFO L82 PathProgramCache]: Analyzing trace with hash 941156, now seen corresponding path program 1 times [2019-01-18 17:39:11,256 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:11,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:11,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:11,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:11,257 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:11,386 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:11,386 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:11,386 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:11,387 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [27] [2019-01-18 17:39:11,388 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:11,388 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:11,395 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:11,395 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:11,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:11,395 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:11,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:11,396 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 [2019-01-18 17:39:11,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:11,404 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:11,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:11,434 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 21 treesize of output 24 [2019-01-18 17:39:11,439 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 24 treesize of output 30 [2019-01-18 17:39:11,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,447 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 26 treesize of output 40 [2019-01-18 17:39:11,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:11,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,471 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 30 treesize of output 72 [2019-01-18 17:39:11,481 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:11,482 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:11,546 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:11,568 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:11,585 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:11,598 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:11,611 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:11,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,639 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 48 treesize of output 54 [2019-01-18 17:39:11,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,671 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 41 treesize of output 53 [2019-01-18 17:39:11,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,711 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 32 treesize of output 61 [2019-01-18 17:39:11,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,760 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:11,761 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:11,778 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:11,793 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:11,809 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:11,840 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:11,840 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:11,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,889 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 17:39:11,890 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:11,919 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:11,919 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 17:39:11,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:11,954 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:11,956 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2019-01-18 17:39:11,957 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:11,995 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:11,996 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:42 [2019-01-18 17:39:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:12,013 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:12,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:12,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:39:12,055 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:12,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:12,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:12,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:39:12,056 INFO L87 Difference]: Start difference. First operand 30 states and 110 transitions. Second operand 8 states. [2019-01-18 17:39:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:12,443 INFO L93 Difference]: Finished difference Result 57 states and 144 transitions. [2019-01-18 17:39:12,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:39:12,450 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:39:12,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:12,451 INFO L225 Difference]: With dead ends: 57 [2019-01-18 17:39:12,451 INFO L226 Difference]: Without dead ends: 55 [2019-01-18 17:39:12,451 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 [2019-01-18 17:39:12,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-01-18 17:39:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2019-01-18 17:39:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-18 17:39:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 109 transitions. [2019-01-18 17:39:12,460 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 109 transitions. Word has length 4 [2019-01-18 17:39:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:12,461 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 109 transitions. [2019-01-18 17:39:12,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:12,461 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 109 transitions. [2019-01-18 17:39:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:12,462 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:12,462 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:12,462 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:12,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:12,462 INFO L82 PathProgramCache]: Analyzing trace with hash 941280, now seen corresponding path program 1 times [2019-01-18 17:39:12,463 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:12,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:12,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:12,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:12,464 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:12,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:12,549 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:12,550 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:12,550 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [27] [2019-01-18 17:39:12,551 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:12,551 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:12,555 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:12,556 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:12,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:12,556 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:12,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:12,556 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 [2019-01-18 17:39:12,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:12,568 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:12,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:12,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:12,602 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 48 treesize of output 54 [2019-01-18 17:39:12,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:12,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:12,640 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 41 treesize of output 53 [2019-01-18 17:39:12,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:12,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:12,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:12,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:12,686 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 32 treesize of output 61 [2019-01-18 17:39:12,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:12,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:12,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:12,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:12,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:12,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:12,760 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:12,761 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:12,777 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:12,793 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:12,809 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:12,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:39:12,836 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 30 [2019-01-18 17:39:12,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:39:12,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:12,850 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 30 treesize of output 72 [2019-01-18 17:39:12,858 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:12,859 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:13,274 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:13,305 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:13,321 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:13,334 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:13,345 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:13,377 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:13,378 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:13,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:13,420 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 17:39:13,421 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:13,447 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:13,448 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 17:39:13,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:13,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:13,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:13,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:13,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:13,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:13,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:13,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 17:39:13,485 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:13,518 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:13,518 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-01-18 17:39:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:13,536 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:13,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:13,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:39:13,579 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:13,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:13,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:13,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:39:13,581 INFO L87 Difference]: Start difference. First operand 30 states and 109 transitions. Second operand 8 states. [2019-01-18 17:39:13,767 WARN L181 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2019-01-18 17:39:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:14,154 INFO L93 Difference]: Finished difference Result 57 states and 158 transitions. [2019-01-18 17:39:14,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:39:14,155 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:39:14,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:14,156 INFO L225 Difference]: With dead ends: 57 [2019-01-18 17:39:14,156 INFO L226 Difference]: Without dead ends: 53 [2019-01-18 17:39:14,157 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:39:14,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-01-18 17:39:14,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2019-01-18 17:39:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-18 17:39:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 126 transitions. [2019-01-18 17:39:14,166 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 126 transitions. Word has length 4 [2019-01-18 17:39:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:14,166 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 126 transitions. [2019-01-18 17:39:14,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 126 transitions. [2019-01-18 17:39:14,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:14,167 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:14,167 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:14,168 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:14,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:14,168 INFO L82 PathProgramCache]: Analyzing trace with hash 929872, now seen corresponding path program 1 times [2019-01-18 17:39:14,168 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:14,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:14,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:14,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:14,169 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:14,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:14,260 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:14,261 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:14,261 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [27] [2019-01-18 17:39:14,262 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:14,262 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:14,266 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:14,266 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:14,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:14,267 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:14,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:14,267 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 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 [2019-01-18 17:39:14,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:14,277 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:14,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:14,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,312 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 48 treesize of output 54 [2019-01-18 17:39:14,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,345 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 41 treesize of output 53 [2019-01-18 17:39:14,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,450 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 32 treesize of output 61 [2019-01-18 17:39:14,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,498 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:14,499 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:14,516 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:14,531 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:14,545 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:14,569 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:39:14,586 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 30 [2019-01-18 17:39:14,593 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:39:14,596 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:14,599 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 30 treesize of output 72 [2019-01-18 17:39:14,606 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:14,607 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:14,631 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:14,651 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:14,666 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:14,679 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:14,691 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:14,724 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. [2019-01-18 17:39:14,724 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:14,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,768 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:39:14,769 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:14,797 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:14,798 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 17:39:14,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:14,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:39:14,832 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:14,868 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:14,868 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:38 [2019-01-18 17:39:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:14,884 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:14,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:14,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:39:14,916 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:14,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:14,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:14,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:39:14,917 INFO L87 Difference]: Start difference. First operand 31 states and 126 transitions. Second operand 8 states. [2019-01-18 17:39:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:15,305 INFO L93 Difference]: Finished difference Result 73 states and 228 transitions. [2019-01-18 17:39:15,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:39:15,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:39:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:15,306 INFO L225 Difference]: With dead ends: 73 [2019-01-18 17:39:15,306 INFO L226 Difference]: Without dead ends: 71 [2019-01-18 17:39:15,306 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:39:15,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-01-18 17:39:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 40. [2019-01-18 17:39:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-01-18 17:39:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 173 transitions. [2019-01-18 17:39:15,317 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 173 transitions. Word has length 4 [2019-01-18 17:39:15,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:15,317 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 173 transitions. [2019-01-18 17:39:15,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 173 transitions. [2019-01-18 17:39:15,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:15,318 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:15,318 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:15,318 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash 930184, now seen corresponding path program 1 times [2019-01-18 17:39:15,319 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:15,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:15,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:15,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:15,320 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:15,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:15,382 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:15,382 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:15,383 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [29] [2019-01-18 17:39:15,384 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:15,384 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:15,392 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:15,393 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:39:15,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:15,393 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:15,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:15,393 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 [2019-01-18 17:39:15,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:15,402 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:15,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:15,426 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 21 treesize of output 24 [2019-01-18 17:39:15,430 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 24 treesize of output 30 [2019-01-18 17:39:15,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,451 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 26 treesize of output 40 [2019-01-18 17:39:15,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,464 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 28 treesize of output 54 [2019-01-18 17:39:15,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,472 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 30 treesize of output 72 [2019-01-18 17:39:15,494 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:15,495 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:15,523 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:15,544 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:15,561 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:15,575 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:15,588 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:15,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,617 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 48 treesize of output 54 [2019-01-18 17:39:15,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,649 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 41 treesize of output 53 [2019-01-18 17:39:15,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,685 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 32 treesize of output 61 [2019-01-18 17:39:15,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,732 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:15,733 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:15,749 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:15,762 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:15,778 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:15,810 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. [2019-01-18 17:39:15,811 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:15,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:15,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:39:15,919 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:15,952 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:15,953 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2019-01-18 17:39:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:15,968 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:15,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:15,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:39:15,997 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:15,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:39:15,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:39:15,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:15,998 INFO L87 Difference]: Start difference. First operand 40 states and 173 transitions. Second operand 6 states. [2019-01-18 17:39:16,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:16,237 INFO L93 Difference]: Finished difference Result 56 states and 192 transitions. [2019-01-18 17:39:16,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:39:16,238 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-18 17:39:16,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:16,238 INFO L225 Difference]: With dead ends: 56 [2019-01-18 17:39:16,238 INFO L226 Difference]: Without dead ends: 55 [2019-01-18 17:39:16,239 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:39:16,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-01-18 17:39:16,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2019-01-18 17:39:16,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-01-18 17:39:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 180 transitions. [2019-01-18 17:39:16,254 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 180 transitions. Word has length 4 [2019-01-18 17:39:16,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:16,254 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 180 transitions. [2019-01-18 17:39:16,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:39:16,254 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 180 transitions. [2019-01-18 17:39:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:16,255 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:16,255 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:16,255 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:16,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:16,256 INFO L82 PathProgramCache]: Analyzing trace with hash 945434, now seen corresponding path program 1 times [2019-01-18 17:39:16,256 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:16,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:16,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:16,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:16,257 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:16,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:16,367 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:16,367 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:16,368 INFO L207 CegarAbsIntRunner]: [0], [22], [24], [27] [2019-01-18 17:39:16,368 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:16,369 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:16,373 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:16,373 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:16,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:16,373 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:16,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:16,374 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 [2019-01-18 17:39:16,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:16,382 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:16,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:16,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,416 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 68 treesize of output 71 [2019-01-18 17:39:16,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-18 17:39:16,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,503 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 46 treesize of output 72 [2019-01-18 17:39:16,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,565 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 37 treesize of output 80 [2019-01-18 17:39:16,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:16,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:39:16,677 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:16,727 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:16,757 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:16,792 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:16,826 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:16,891 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 21 treesize of output 24 [2019-01-18 17:39:16,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:39:16,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:39:16,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:16,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:39:16,908 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:39:16,909 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:16,951 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:16,972 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:16,988 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:16,999 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:17,010 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:17,054 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:17,054 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 17:39:17,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:17,099 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:39:17,099 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:17,142 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:17,142 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:17,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:17,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:17,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:17,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:17,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:17,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:17,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:17,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:17,424 INFO L303 Elim1Store]: Index analysis took 195 ms [2019-01-18 17:39:17,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-18 17:39:17,426 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:17,949 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. [2019-01-18 17:39:17,950 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-01-18 17:39:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:17,983 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:18,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:18,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:39:18,021 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:18,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:18,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:18,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:39:18,022 INFO L87 Difference]: Start difference. First operand 42 states and 180 transitions. Second operand 8 states. [2019-01-18 17:39:18,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:18,498 INFO L93 Difference]: Finished difference Result 96 states and 313 transitions. [2019-01-18 17:39:18,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:39:18,498 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:39:18,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:18,500 INFO L225 Difference]: With dead ends: 96 [2019-01-18 17:39:18,500 INFO L226 Difference]: Without dead ends: 93 [2019-01-18 17:39:18,500 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-01-18 17:39:18,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-01-18 17:39:18,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2019-01-18 17:39:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-01-18 17:39:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 250 transitions. [2019-01-18 17:39:18,514 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 250 transitions. Word has length 4 [2019-01-18 17:39:18,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:18,514 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 250 transitions. [2019-01-18 17:39:18,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:18,514 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 250 transitions. [2019-01-18 17:39:18,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:18,515 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:18,515 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:18,516 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:18,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:18,516 INFO L82 PathProgramCache]: Analyzing trace with hash 945000, now seen corresponding path program 1 times [2019-01-18 17:39:18,516 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:18,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:18,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:18,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:18,517 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:18,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:18,595 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:18,595 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:18,596 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [27] [2019-01-18 17:39:18,599 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:18,599 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:18,603 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:18,603 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:18,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:18,604 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:18,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:18,604 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 [2019-01-18 17:39:18,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:18,613 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:18,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:18,660 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 21 treesize of output 24 [2019-01-18 17:39:18,662 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 24 treesize of output 30 [2019-01-18 17:39:18,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,668 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 26 treesize of output 40 [2019-01-18 17:39:18,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,673 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 28 treesize of output 54 [2019-01-18 17:39:18,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,680 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 30 treesize of output 72 [2019-01-18 17:39:18,690 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:18,691 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:18,718 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:18,741 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:18,759 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:18,773 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:18,785 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:18,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,816 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 48 treesize of output 54 [2019-01-18 17:39:18,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,849 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 41 treesize of output 53 [2019-01-18 17:39:18,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,889 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 32 treesize of output 61 [2019-01-18 17:39:18,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:18,937 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:18,937 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:18,952 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:18,968 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:18,984 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:19,017 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:19,018 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:19,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,062 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:39:19,063 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:19,091 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:19,092 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 17:39:19,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-01-18 17:39:19,119 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:19,155 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:19,155 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:38 [2019-01-18 17:39:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:19,179 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:19,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:19,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:39:19,224 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:19,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:19,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:19,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:39:19,225 INFO L87 Difference]: Start difference. First operand 55 states and 250 transitions. Second operand 8 states. [2019-01-18 17:39:19,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:19,695 INFO L93 Difference]: Finished difference Result 84 states and 299 transitions. [2019-01-18 17:39:19,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:39:19,695 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:39:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:19,697 INFO L225 Difference]: With dead ends: 84 [2019-01-18 17:39:19,697 INFO L226 Difference]: Without dead ends: 82 [2019-01-18 17:39:19,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:39:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-01-18 17:39:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 58. [2019-01-18 17:39:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-01-18 17:39:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 270 transitions. [2019-01-18 17:39:19,716 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 270 transitions. Word has length 4 [2019-01-18 17:39:19,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:19,716 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 270 transitions. [2019-01-18 17:39:19,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:19,716 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 270 transitions. [2019-01-18 17:39:19,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:19,717 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:19,717 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:19,717 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:19,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:19,718 INFO L82 PathProgramCache]: Analyzing trace with hash 946922, now seen corresponding path program 1 times [2019-01-18 17:39:19,718 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:19,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:19,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:19,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:19,719 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:19,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:19,793 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:19,793 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:19,793 INFO L207 CegarAbsIntRunner]: [0], [10], [24], [27] [2019-01-18 17:39:19,794 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:19,795 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:19,798 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:19,799 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:19,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:19,799 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:19,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:19,799 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 [2019-01-18 17:39:19,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:19,808 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:19,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:19,842 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 21 treesize of output 24 [2019-01-18 17:39:19,846 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 24 treesize of output 30 [2019-01-18 17:39:19,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,850 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 26 treesize of output 40 [2019-01-18 17:39:19,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,856 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 28 treesize of output 54 [2019-01-18 17:39:19,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,916 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 30 treesize of output 72 [2019-01-18 17:39:19,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:19,928 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:39:19,929 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:19,970 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:19,992 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:20,011 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:20,024 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:20,036 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:20,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,069 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 68 treesize of output 71 [2019-01-18 17:39:20,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,108 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 58 treesize of output 67 [2019-01-18 17:39:20,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,154 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 46 treesize of output 72 [2019-01-18 17:39:20,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,218 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 37 treesize of output 80 [2019-01-18 17:39:20,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:39:20,290 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:20,314 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:20,340 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:20,366 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:20,392 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:20,438 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:20,438 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 17:39:20,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,505 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:39:20,506 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:20,551 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:20,552 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:20,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:20,613 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:20,615 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2019-01-18 17:39:20,616 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:20,663 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. [2019-01-18 17:39:20,664 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-18 17:39:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:20,682 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:20,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:20,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:39:20,722 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:20,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:20,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:20,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:39:20,723 INFO L87 Difference]: Start difference. First operand 58 states and 270 transitions. Second operand 8 states. [2019-01-18 17:39:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:21,466 INFO L93 Difference]: Finished difference Result 91 states and 313 transitions. [2019-01-18 17:39:21,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:39:21,466 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:39:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:21,468 INFO L225 Difference]: With dead ends: 91 [2019-01-18 17:39:21,468 INFO L226 Difference]: Without dead ends: 89 [2019-01-18 17:39:21,470 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 [2019-01-18 17:39:21,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-01-18 17:39:21,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2019-01-18 17:39:21,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-18 17:39:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 277 transitions. [2019-01-18 17:39:21,486 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 277 transitions. Word has length 4 [2019-01-18 17:39:21,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:21,487 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 277 transitions. [2019-01-18 17:39:21,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:21,487 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 277 transitions. [2019-01-18 17:39:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:21,488 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:21,488 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:21,488 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:21,488 INFO L82 PathProgramCache]: Analyzing trace with hash 934028, now seen corresponding path program 1 times [2019-01-18 17:39:21,488 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:21,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:21,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:21,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:21,489 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:21,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:21,529 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:21,530 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:21,530 INFO L207 CegarAbsIntRunner]: [0], [10], [28], [29] [2019-01-18 17:39:21,532 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:21,532 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:21,538 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:21,538 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:39:21,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:21,538 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:21,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:21,539 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 [2019-01-18 17:39:21,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:21,547 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:21,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:21,561 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 21 treesize of output 24 [2019-01-18 17:39:21,568 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 24 treesize of output 26 [2019-01-18 17:39:21,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:21,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:21,578 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 26 treesize of output 36 [2019-01-18 17:39:21,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:21,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:21,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:21,604 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 28 treesize of output 50 [2019-01-18 17:39:21,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:21,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:21,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:21,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:21,618 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 30 treesize of output 68 [2019-01-18 17:39:21,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:39:21,629 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:21,879 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:21,901 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:21,920 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:21,935 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:21,949 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:21,976 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 43 treesize of output 39 [2019-01-18 17:39:21,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:21,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:21,994 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 36 treesize of output 49 [2019-01-18 17:39:22,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,035 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 32 treesize of output 57 [2019-01-18 17:39:22,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,087 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:39:22,087 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:22,102 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:22,117 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:22,133 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:22,164 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. [2019-01-18 17:39:22,165 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:64, output treesize:67 [2019-01-18 17:39:22,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:39:22,198 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:39:22,289 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-18 17:39:22,289 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:92 [2019-01-18 17:39:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:22,337 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:22,381 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-18 17:39:22,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-18 17:39:22,381 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:39:22,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 17:39:22,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 17:39:22,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 17:39:22,382 INFO L87 Difference]: Start difference. First operand 59 states and 277 transitions. Second operand 4 states. [2019-01-18 17:39:22,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:22,482 INFO L93 Difference]: Finished difference Result 90 states and 454 transitions. [2019-01-18 17:39:22,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 17:39:22,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-18 17:39:22,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:22,484 INFO L225 Difference]: With dead ends: 90 [2019-01-18 17:39:22,485 INFO L226 Difference]: Without dead ends: 89 [2019-01-18 17:39:22,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 17:39:22,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-01-18 17:39:22,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2019-01-18 17:39:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-01-18 17:39:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 449 transitions. [2019-01-18 17:39:22,506 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 449 transitions. Word has length 4 [2019-01-18 17:39:22,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:22,506 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 449 transitions. [2019-01-18 17:39:22,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 17:39:22,506 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 449 transitions. [2019-01-18 17:39:22,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:22,507 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:22,507 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:22,508 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:22,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:22,508 INFO L82 PathProgramCache]: Analyzing trace with hash 933592, now seen corresponding path program 1 times [2019-01-18 17:39:22,508 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:22,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:22,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:22,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:22,509 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:22,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:22,622 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:22,622 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:22,622 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [27] [2019-01-18 17:39:22,623 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:22,624 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:22,628 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:22,628 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:22,629 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:22,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:22,629 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 [2019-01-18 17:39:22,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:22,639 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:22,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:22,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,675 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-18 17:39:22,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,708 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 41 treesize of output 53 [2019-01-18 17:39:22,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,749 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-18 17:39:22,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:22,802 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:22,802 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:22,822 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:22,844 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:22,867 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:22,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:39:22,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 30 [2019-01-18 17:39:22,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:39:22,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:22,909 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 30 treesize of output 72 [2019-01-18 17:39:22,917 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:22,917 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:22,942 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:22,962 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:22,978 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:22,992 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:23,004 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:23,037 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:23,037 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:23,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,141 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:39:23,141 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:23,243 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:23,243 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 17:39:23,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,293 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 17:39:23,293 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:23,324 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:23,324 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-01-18 17:39:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:23,342 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:23,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:23,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:39:23,387 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:23,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:23,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:23,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:39:23,388 INFO L87 Difference]: Start difference. First operand 83 states and 449 transitions. Second operand 8 states. [2019-01-18 17:39:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:23,772 INFO L93 Difference]: Finished difference Result 121 states and 532 transitions. [2019-01-18 17:39:23,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:39:23,773 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 17:39:23,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:23,775 INFO L225 Difference]: With dead ends: 121 [2019-01-18 17:39:23,775 INFO L226 Difference]: Without dead ends: 119 [2019-01-18 17:39:23,776 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:39:23,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-01-18 17:39:23,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2019-01-18 17:39:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-01-18 17:39:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 493 transitions. [2019-01-18 17:39:23,792 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 493 transitions. Word has length 4 [2019-01-18 17:39:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:23,792 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 493 transitions. [2019-01-18 17:39:23,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:23,793 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 493 transitions. [2019-01-18 17:39:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 17:39:23,794 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:23,794 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 17:39:23,794 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:23,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:23,794 INFO L82 PathProgramCache]: Analyzing trace with hash 937872, now seen corresponding path program 1 times [2019-01-18 17:39:23,795 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:23,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:23,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:23,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:23,795 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:23,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:23,939 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:23,940 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 17:39:23,940 INFO L207 CegarAbsIntRunner]: [0], [14], [28], [29] [2019-01-18 17:39:23,941 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:23,941 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:23,944 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:23,945 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 66 root evaluator evaluations with a maximum evaluation depth of 2. Performed 66 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:39:23,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:23,945 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:23,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:23,945 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 [2019-01-18 17:39:23,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:23,955 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:23,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:23,968 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 21 treesize of output 24 [2019-01-18 17:39:23,971 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 24 treesize of output 26 [2019-01-18 17:39:23,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,980 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 26 treesize of output 36 [2019-01-18 17:39:23,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:23,998 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 28 treesize of output 50 [2019-01-18 17:39:24,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,015 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 30 treesize of output 68 [2019-01-18 17:39:24,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:39:24,029 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,054 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,073 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,089 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,102 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,115 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,138 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 43 treesize of output 39 [2019-01-18 17:39:24,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,155 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 36 treesize of output 49 [2019-01-18 17:39:24,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,188 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 32 treesize of output 57 [2019-01-18 17:39:24,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,242 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:39:24,243 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,265 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,279 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,295 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,325 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. [2019-01-18 17:39:24,325 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2019-01-18 17:39:24,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,363 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2019-01-18 17:39:24,363 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:24,388 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:24,389 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:46 [2019-01-18 17:39:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:24,455 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:24,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:24,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:39:24,484 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:24,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:39:24,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:39:24,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:39:24,485 INFO L87 Difference]: Start difference. First operand 91 states and 493 transitions. Second operand 6 states. [2019-01-18 17:39:24,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:24,747 INFO L93 Difference]: Finished difference Result 110 states and 511 transitions. [2019-01-18 17:39:24,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:39:24,748 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-18 17:39:24,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:24,750 INFO L225 Difference]: With dead ends: 110 [2019-01-18 17:39:24,750 INFO L226 Difference]: Without dead ends: 109 [2019-01-18 17:39:24,750 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:39:24,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-01-18 17:39:24,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2019-01-18 17:39:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-01-18 17:39:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 493 transitions. [2019-01-18 17:39:24,764 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 493 transitions. Word has length 4 [2019-01-18 17:39:24,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:24,764 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 493 transitions. [2019-01-18 17:39:24,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:39:24,764 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 493 transitions. [2019-01-18 17:39:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:24,765 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:24,766 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-01-18 17:39:24,766 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:24,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:24,766 INFO L82 PathProgramCache]: Analyzing trace with hash 29182900, now seen corresponding path program 2 times [2019-01-18 17:39:24,766 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:24,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:24,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:24,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:24,767 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:24,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:24,846 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:24,846 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:39:24,846 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:39:24,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:24,847 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 [2019-01-18 17:39:24,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 17:39:24,855 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 17:39:24,898 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 17:39:24,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:39:24,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:24,930 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 21 treesize of output 24 [2019-01-18 17:39:24,951 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 24 treesize of output 30 [2019-01-18 17:39:24,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,960 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 26 treesize of output 40 [2019-01-18 17:39:24,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,968 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:24,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,975 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 30 treesize of output 72 [2019-01-18 17:39:24,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:24,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,005 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:39:25,006 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,045 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,125 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,143 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,156 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,169 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-18 17:39:25,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,261 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 58 treesize of output 67 [2019-01-18 17:39:25,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,307 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 46 treesize of output 72 [2019-01-18 17:39:25,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,363 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 37 treesize of output 80 [2019-01-18 17:39:25,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:39:25,434 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,460 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,485 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,509 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,535 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,580 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. [2019-01-18 17:39:25,581 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:92, output treesize:91 [2019-01-18 17:39:25,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,604 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-18 17:39:25,604 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,646 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:25,647 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:25,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 103 [2019-01-18 17:39:25,675 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,723 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. [2019-01-18 17:39:25,723 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:71 [2019-01-18 17:39:25,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:25,754 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-18 17:39:25,755 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:25,807 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. [2019-01-18 17:39:25,807 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2019-01-18 17:39:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:26,042 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:26,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:26,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:39:26,576 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:26,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:39:26,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:39:26,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:39:26,577 INFO L87 Difference]: Start difference. First operand 91 states and 493 transitions. Second operand 10 states. [2019-01-18 17:39:27,552 WARN L181 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2019-01-18 17:39:28,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:28,479 INFO L93 Difference]: Finished difference Result 133 states and 606 transitions. [2019-01-18 17:39:28,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:39:28,479 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:39:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:28,482 INFO L225 Difference]: With dead ends: 133 [2019-01-18 17:39:28,482 INFO L226 Difference]: Without dead ends: 128 [2019-01-18 17:39:28,482 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:39:28,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-01-18 17:39:28,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2019-01-18 17:39:28,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-01-18 17:39:28,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 538 transitions. [2019-01-18 17:39:28,502 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 538 transitions. Word has length 5 [2019-01-18 17:39:28,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:28,502 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 538 transitions. [2019-01-18 17:39:28,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:39:28,502 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 538 transitions. [2019-01-18 17:39:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:28,503 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:28,503 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:39:28,504 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:28,504 INFO L82 PathProgramCache]: Analyzing trace with hash 29172052, now seen corresponding path program 1 times [2019-01-18 17:39:28,504 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:28,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:28,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:39:28,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:28,505 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:28,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:28,630 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:28,631 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:39:28,631 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [28], [29] [2019-01-18 17:39:28,633 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:28,633 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:28,636 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:28,636 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:28,637 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:28,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:28,637 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 [2019-01-18 17:39:28,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:28,650 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:28,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:28,679 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 21 treesize of output 24 [2019-01-18 17:39:28,685 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:39:28,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,693 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 26 treesize of output 40 [2019-01-18 17:39:28,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,698 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 28 treesize of output 54 [2019-01-18 17:39:28,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,705 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 30 treesize of output 72 [2019-01-18 17:39:28,715 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:28,715 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,743 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,764 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,782 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,797 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,810 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,838 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 48 treesize of output 54 [2019-01-18 17:39:28,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,874 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 41 treesize of output 53 [2019-01-18 17:39:28,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,918 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 32 treesize of output 61 [2019-01-18 17:39:28,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:28,968 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:28,969 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,983 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:28,999 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:29,015 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:29,048 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:29,048 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:29,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 17:39:29,098 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:29,126 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:29,126 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 17:39:29,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 17:39:29,157 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:29,192 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:29,192 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-01-18 17:39:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:29,248 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:29,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:29,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:39:29,316 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:29,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:29,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:29,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:39:29,317 INFO L87 Difference]: Start difference. First operand 95 states and 538 transitions. Second operand 8 states. [2019-01-18 17:39:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:29,674 INFO L93 Difference]: Finished difference Result 125 states and 622 transitions. [2019-01-18 17:39:29,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:39:29,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:39:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:29,676 INFO L225 Difference]: With dead ends: 125 [2019-01-18 17:39:29,676 INFO L226 Difference]: Without dead ends: 124 [2019-01-18 17:39:29,677 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:39:29,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-01-18 17:39:29,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 102. [2019-01-18 17:39:29,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-01-18 17:39:29,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 589 transitions. [2019-01-18 17:39:29,696 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 589 transitions. Word has length 5 [2019-01-18 17:39:29,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:29,696 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 589 transitions. [2019-01-18 17:39:29,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:29,696 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 589 transitions. [2019-01-18 17:39:29,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:29,697 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:29,697 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:39:29,698 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:29,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:29,698 INFO L82 PathProgramCache]: Analyzing trace with hash 29187302, now seen corresponding path program 1 times [2019-01-18 17:39:29,698 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:29,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:29,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:29,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:29,699 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:29,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:29,847 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:29,848 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:39:29,848 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [24], [27] [2019-01-18 17:39:29,849 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:29,849 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:29,852 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:29,852 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:39:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:29,852 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:29,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:29,852 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-18 17:39:29,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:29,864 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:29,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:29,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,899 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 68 treesize of output 71 [2019-01-18 17:39:29,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,936 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 58 treesize of output 67 [2019-01-18 17:39:29,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:29,981 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 46 treesize of output 72 [2019-01-18 17:39:30,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,037 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 37 treesize of output 80 [2019-01-18 17:39:30,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:39:30,107 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,132 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,177 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,205 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,232 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,269 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 21 treesize of output 24 [2019-01-18 17:39:30,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:39:30,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:39:30,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:30,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:39:30,284 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:39:30,284 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,320 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,340 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,357 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,369 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,381 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,426 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:30,427 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 17:39:30,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,462 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-18 17:39:30,462 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,506 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:30,507 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:30,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2019-01-18 17:39:30,562 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,606 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:30,607 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-18 17:39:30,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,643 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:30,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:30,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-18 17:39:30,646 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:30,697 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. [2019-01-18 17:39:30,697 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-18 17:39:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:30,719 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:30,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:30,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:39:30,780 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:30,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:39:30,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:39:30,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:39:30,781 INFO L87 Difference]: Start difference. First operand 102 states and 589 transitions. Second operand 10 states. [2019-01-18 17:39:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:32,102 INFO L93 Difference]: Finished difference Result 149 states and 665 transitions. [2019-01-18 17:39:32,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:39:32,103 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:39:32,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:32,105 INFO L225 Difference]: With dead ends: 149 [2019-01-18 17:39:32,105 INFO L226 Difference]: Without dead ends: 145 [2019-01-18 17:39:32,105 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:39:32,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-01-18 17:39:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 105. [2019-01-18 17:39:32,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-01-18 17:39:32,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 605 transitions. [2019-01-18 17:39:32,126 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 605 transitions. Word has length 5 [2019-01-18 17:39:32,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:32,127 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 605 transitions. [2019-01-18 17:39:32,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:39:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 605 transitions. [2019-01-18 17:39:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:32,128 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:32,128 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:39:32,128 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:32,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:32,128 INFO L82 PathProgramCache]: Analyzing trace with hash 29186868, now seen corresponding path program 1 times [2019-01-18 17:39:32,128 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:32,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:32,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:32,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:32,129 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:32,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:32,258 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:32,258 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:39:32,258 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [27] [2019-01-18 17:39:32,260 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:32,260 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:32,265 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:32,265 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:39:32,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:32,266 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:32,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:32,266 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-18 17:39:32,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:32,281 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:32,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:32,306 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 21 treesize of output 24 [2019-01-18 17:39:32,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:39:32,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,317 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 26 treesize of output 40 [2019-01-18 17:39:32,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,326 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 28 treesize of output 54 [2019-01-18 17:39:32,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,340 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 30 treesize of output 72 [2019-01-18 17:39:32,350 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:32,351 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,379 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,398 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,416 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,431 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,444 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,474 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 48 treesize of output 54 [2019-01-18 17:39:32,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,506 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 41 treesize of output 53 [2019-01-18 17:39:32,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,544 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 32 treesize of output 61 [2019-01-18 17:39:32,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,595 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:32,595 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,611 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,627 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,643 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,675 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:32,676 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:32,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,746 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 17:39:32,747 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,775 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:32,776 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-18 17:39:32,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-01-18 17:39:32,809 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:32,838 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2019-01-18 17:39:32,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,871 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:32,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:32,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2019-01-18 17:39:32,874 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:32,909 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:32,909 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2019-01-18 17:39:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:32,928 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:32,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:32,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:39:32,985 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:32,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:39:32,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:39:32,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:39:32,986 INFO L87 Difference]: Start difference. First operand 105 states and 605 transitions. Second operand 10 states. [2019-01-18 17:39:33,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:33,535 INFO L93 Difference]: Finished difference Result 138 states and 662 transitions. [2019-01-18 17:39:33,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:39:33,536 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:39:33,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:33,538 INFO L225 Difference]: With dead ends: 138 [2019-01-18 17:39:33,538 INFO L226 Difference]: Without dead ends: 136 [2019-01-18 17:39:33,538 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:39:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-01-18 17:39:33,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2019-01-18 17:39:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-18 17:39:33,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-01-18 17:39:33,560 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 5 [2019-01-18 17:39:33,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:33,560 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-01-18 17:39:33,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:39:33,560 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-01-18 17:39:33,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:33,561 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:33,561 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:39:33,561 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:33,561 INFO L82 PathProgramCache]: Analyzing trace with hash 29188666, now seen corresponding path program 1 times [2019-01-18 17:39:33,562 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:33,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:33,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:33,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:33,563 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:33,695 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2019-01-18 17:39:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:33,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:33,713 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:33,713 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:39:33,714 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [27] [2019-01-18 17:39:33,714 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:33,714 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:33,718 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:33,718 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:39:33,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:33,719 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:33,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:33,719 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 [2019-01-18 17:39:33,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:33,730 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:33,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:33,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,764 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 68 treesize of output 71 [2019-01-18 17:39:33,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,804 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 58 treesize of output 67 [2019-01-18 17:39:33,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,849 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 46 treesize of output 72 [2019-01-18 17:39:33,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,904 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 37 treesize of output 80 [2019-01-18 17:39:33,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:33,981 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:39:33,981 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,007 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,034 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,060 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,086 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,123 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 21 treesize of output 24 [2019-01-18 17:39:34,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:39:34,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:39:34,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:34,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:39:34,138 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:39:34,138 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,173 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,193 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,209 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,222 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,234 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,280 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:34,280 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 17:39:34,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,307 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-18 17:39:34,308 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,351 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:34,352 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:34,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,409 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:34,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-01-18 17:39:34,411 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,452 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. [2019-01-18 17:39:34,453 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-18 17:39:34,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:34,488 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2019-01-18 17:39:34,489 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:34,547 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. [2019-01-18 17:39:34,548 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2019-01-18 17:39:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:34,565 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:34,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:34,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:39:34,610 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:34,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:39:34,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:39:34,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:39:34,611 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 10 states. [2019-01-18 17:39:35,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:35,178 INFO L93 Difference]: Finished difference Result 152 states and 738 transitions. [2019-01-18 17:39:35,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:39:35,181 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:39:35,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:35,183 INFO L225 Difference]: With dead ends: 152 [2019-01-18 17:39:35,183 INFO L226 Difference]: Without dead ends: 151 [2019-01-18 17:39:35,184 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2019-01-18 17:39:35,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-01-18 17:39:35,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2019-01-18 17:39:35,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-01-18 17:39:35,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 612 transitions. [2019-01-18 17:39:35,200 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 612 transitions. Word has length 5 [2019-01-18 17:39:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:35,201 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 612 transitions. [2019-01-18 17:39:35,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:39:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 612 transitions. [2019-01-18 17:39:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:35,202 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:35,202 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:39:35,202 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:35,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:35,202 INFO L82 PathProgramCache]: Analyzing trace with hash 29188790, now seen corresponding path program 1 times [2019-01-18 17:39:35,202 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:35,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:35,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:35,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:35,203 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:35,552 WARN L181 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2019-01-18 17:39:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:35,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:35,689 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:35,689 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:39:35,689 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [24], [27] [2019-01-18 17:39:35,690 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:35,690 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:35,693 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:35,693 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:39:35,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:35,694 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:35,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:35,694 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 [2019-01-18 17:39:35,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:35,705 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:35,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:35,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,768 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 68 treesize of output 71 [2019-01-18 17:39:35,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,806 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 58 treesize of output 67 [2019-01-18 17:39:35,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,852 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 46 treesize of output 72 [2019-01-18 17:39:35,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:35,929 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 37 treesize of output 80 [2019-01-18 17:39:36,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,012 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:39:36,012 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,080 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,109 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,142 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,173 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,215 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 21 treesize of output 24 [2019-01-18 17:39:36,219 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:39:36,221 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:39:36,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:36,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:39:36,229 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:39:36,230 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,268 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,287 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,303 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,316 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,328 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,373 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:36,373 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 17:39:36,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-18 17:39:36,409 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,453 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:36,453 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:36,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,499 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:36,500 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-01-18 17:39:36,500 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,560 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:36,560 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2019-01-18 17:39:36,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:36,618 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:36,618 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 108 [2019-01-18 17:39:36,619 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:36,799 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. [2019-01-18 17:39:36,799 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:57 [2019-01-18 17:39:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:38,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:38,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:38,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:39:38,257 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:38,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:39:38,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:39:38,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:39:38,258 INFO L87 Difference]: Start difference. First operand 106 states and 612 transitions. Second operand 10 states. [2019-01-18 17:39:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:38,999 INFO L93 Difference]: Finished difference Result 141 states and 665 transitions. [2019-01-18 17:39:39,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:39:39,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:39:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:39,002 INFO L225 Difference]: With dead ends: 141 [2019-01-18 17:39:39,002 INFO L226 Difference]: Without dead ends: 140 [2019-01-18 17:39:39,003 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:39:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-01-18 17:39:39,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2019-01-18 17:39:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-01-18 17:39:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 619 transitions. [2019-01-18 17:39:39,022 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 619 transitions. Word has length 5 [2019-01-18 17:39:39,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:39,022 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 619 transitions. [2019-01-18 17:39:39,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:39:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 619 transitions. [2019-01-18 17:39:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:39,023 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:39,023 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:39:39,023 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:39,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:39,024 INFO L82 PathProgramCache]: Analyzing trace with hash 29175212, now seen corresponding path program 1 times [2019-01-18 17:39:39,024 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:39,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:39,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:39,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:39,025 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:39,301 WARN L181 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2019-01-18 17:39:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:39,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:39,318 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:39,318 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:39:39,318 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [27] [2019-01-18 17:39:39,319 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:39,319 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:39,321 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:39,322 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:39:39,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:39,322 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:39,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:39,322 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 [2019-01-18 17:39:39,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:39,332 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:39,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:39,356 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 21 treesize of output 24 [2019-01-18 17:39:39,359 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 24 treesize of output 30 [2019-01-18 17:39:39,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,362 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 26 treesize of output 40 [2019-01-18 17:39:39,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,369 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 28 treesize of output 54 [2019-01-18 17:39:39,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,395 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 30 treesize of output 72 [2019-01-18 17:39:39,403 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:39,404 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:39,432 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:39,455 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:39,474 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:39,489 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:39,502 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:39,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,533 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 48 treesize of output 54 [2019-01-18 17:39:39,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,567 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 41 treesize of output 53 [2019-01-18 17:39:39,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,603 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 32 treesize of output 61 [2019-01-18 17:39:39,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:39,652 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:39,669 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:39,685 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:39,700 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:39,732 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:39,733 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:39,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,769 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 17:39:39,770 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:39,797 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:39,797 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 17:39:39,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,821 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:39,822 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2019-01-18 17:39:39,822 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:39,858 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:39,858 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:42 [2019-01-18 17:39:39,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:39,887 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 90 [2019-01-18 17:39:39,888 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:39,919 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:39,920 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:38 [2019-01-18 17:39:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:39,938 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:39,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:39,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:39:39,984 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:39,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:39:39,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:39:39,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:39:39,985 INFO L87 Difference]: Start difference. First operand 107 states and 619 transitions. Second operand 10 states. [2019-01-18 17:39:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:40,490 INFO L93 Difference]: Finished difference Result 163 states and 816 transitions. [2019-01-18 17:39:40,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:39:40,491 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:39:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:40,493 INFO L225 Difference]: With dead ends: 163 [2019-01-18 17:39:40,493 INFO L226 Difference]: Without dead ends: 162 [2019-01-18 17:39:40,494 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2019-01-18 17:39:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-01-18 17:39:40,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 116. [2019-01-18 17:39:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-01-18 17:39:40,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 682 transitions. [2019-01-18 17:39:40,512 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 682 transitions. Word has length 5 [2019-01-18 17:39:40,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:40,512 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 682 transitions. [2019-01-18 17:39:40,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:39:40,513 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 682 transitions. [2019-01-18 17:39:40,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:40,513 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:40,513 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:39:40,514 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:40,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:40,514 INFO L82 PathProgramCache]: Analyzing trace with hash 29179614, now seen corresponding path program 1 times [2019-01-18 17:39:40,514 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:40,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:40,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:40,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:40,515 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:40,667 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-18 17:39:40,822 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-01-18 17:39:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:41,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:41,065 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:41,065 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:39:41,065 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [24], [27] [2019-01-18 17:39:41,066 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:41,066 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:41,068 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:41,069 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:39:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:41,069 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:41,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:41,069 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 [2019-01-18 17:39:41,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:41,085 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:41,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:41,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,160 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 68 treesize of output 71 [2019-01-18 17:39:41,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,201 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 58 treesize of output 67 [2019-01-18 17:39:41,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,247 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 46 treesize of output 72 [2019-01-18 17:39:41,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,303 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 37 treesize of output 80 [2019-01-18 17:39:41,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,375 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:39:41,376 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,402 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,428 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,456 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,484 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,519 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 21 treesize of output 24 [2019-01-18 17:39:41,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:39:41,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:39:41,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:41,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:39:41,534 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:39:41,534 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,570 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,591 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,616 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,635 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,649 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,704 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:41,704 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 17:39:41,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,763 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-18 17:39:41,764 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,817 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:41,817 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:41,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-18 17:39:41,868 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:41,924 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:41,924 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-18 17:39:41,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,981 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:41,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:41,983 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-18 17:39:41,984 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:42,041 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. [2019-01-18 17:39:42,041 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-18 17:39:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:42,063 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:42,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:42,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:39:42,120 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:42,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:39:42,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:39:42,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:39:42,121 INFO L87 Difference]: Start difference. First operand 116 states and 682 transitions. Second operand 10 states. [2019-01-18 17:39:42,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:42,803 INFO L93 Difference]: Finished difference Result 163 states and 796 transitions. [2019-01-18 17:39:42,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:39:42,804 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:39:42,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:42,806 INFO L225 Difference]: With dead ends: 163 [2019-01-18 17:39:42,806 INFO L226 Difference]: Without dead ends: 160 [2019-01-18 17:39:42,807 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:39:42,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-01-18 17:39:42,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 122. [2019-01-18 17:39:42,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-01-18 17:39:42,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 724 transitions. [2019-01-18 17:39:42,832 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 724 transitions. Word has length 5 [2019-01-18 17:39:42,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:42,832 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 724 transitions. [2019-01-18 17:39:42,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:39:42,832 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 724 transitions. [2019-01-18 17:39:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:42,833 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:42,833 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:39:42,833 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:42,834 INFO L82 PathProgramCache]: Analyzing trace with hash 29179180, now seen corresponding path program 1 times [2019-01-18 17:39:42,834 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:42,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:42,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:42,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:42,835 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:43,053 WARN L181 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2019-01-18 17:39:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:43,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:43,089 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:43,089 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:39:43,089 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [27] [2019-01-18 17:39:43,090 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:43,090 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:43,093 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:43,093 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:39:43,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:43,094 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:43,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:43,094 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 [2019-01-18 17:39:43,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:43,104 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:43,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:43,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,128 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 48 treesize of output 54 [2019-01-18 17:39:43,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,158 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 41 treesize of output 53 [2019-01-18 17:39:43,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,197 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 32 treesize of output 61 [2019-01-18 17:39:43,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:43,246 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,264 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,280 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,297 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:39:43,323 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 30 [2019-01-18 17:39:43,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:39:43,329 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:43,334 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 30 treesize of output 72 [2019-01-18 17:39:43,341 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:43,342 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,367 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,387 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,403 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,416 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,428 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,460 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:43,460 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:43,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,565 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 17:39:43,565 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,594 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:43,594 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-18 17:39:43,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,626 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 17:39:43,627 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,662 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:43,663 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2019-01-18 17:39:43,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,730 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:43,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:43,732 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2019-01-18 17:39:43,732 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:43,767 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:43,768 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2019-01-18 17:39:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:43,788 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:43,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:43,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:39:43,847 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:43,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:39:43,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:39:43,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:39:43,848 INFO L87 Difference]: Start difference. First operand 122 states and 724 transitions. Second operand 10 states. [2019-01-18 17:39:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:44,380 INFO L93 Difference]: Finished difference Result 165 states and 829 transitions. [2019-01-18 17:39:44,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:39:44,380 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:39:44,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:44,383 INFO L225 Difference]: With dead ends: 165 [2019-01-18 17:39:44,383 INFO L226 Difference]: Without dead ends: 163 [2019-01-18 17:39:44,383 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:39:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-01-18 17:39:44,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2019-01-18 17:39:44,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-01-18 17:39:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 745 transitions. [2019-01-18 17:39:44,409 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 745 transitions. Word has length 5 [2019-01-18 17:39:44,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:44,409 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 745 transitions. [2019-01-18 17:39:44,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:39:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 745 transitions. [2019-01-18 17:39:44,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:44,410 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:44,410 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:39:44,410 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:44,411 INFO L82 PathProgramCache]: Analyzing trace with hash 28829936, now seen corresponding path program 1 times [2019-01-18 17:39:44,411 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:44,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:44,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:44,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:44,411 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:39:44,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:44,468 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:44,468 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:39:44,469 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [28], [29] [2019-01-18 17:39:44,471 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:44,471 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:44,472 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:44,473 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:44,473 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:44,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:44,474 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 [2019-01-18 17:39:44,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:44,482 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:44,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:44,507 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 21 treesize of output 24 [2019-01-18 17:39:44,512 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 24 treesize of output 30 [2019-01-18 17:39:44,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,521 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 26 treesize of output 40 [2019-01-18 17:39:44,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,530 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 28 treesize of output 54 [2019-01-18 17:39:44,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,537 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 30 treesize of output 72 [2019-01-18 17:39:44,550 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:44,551 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:44,581 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:44,604 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:44,622 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:44,637 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:44,650 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:44,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-18 17:39:44,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,711 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 41 treesize of output 53 [2019-01-18 17:39:44,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,752 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 32 treesize of output 61 [2019-01-18 17:39:44,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:44,800 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:44,801 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:44,816 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:44,832 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:44,849 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:44,881 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:44,882 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:45,335 WARN L181 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2019-01-18 17:39:45,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:45,341 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:39:45,341 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:45,370 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:45,371 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 17:39:45,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:45,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:45,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:45,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:45,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:45,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:45,396 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:45,397 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-18 17:39:45,397 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:45,428 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:45,428 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:42 [2019-01-18 17:39:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:45,446 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:45,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:45,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2019-01-18 17:39:45,487 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:45,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-01-18 17:39:45,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-01-18 17:39:45,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:39:45,487 INFO L87 Difference]: Start difference. First operand 125 states and 745 transitions. Second operand 7 states. [2019-01-18 17:39:45,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:45,783 INFO L93 Difference]: Finished difference Result 158 states and 796 transitions. [2019-01-18 17:39:45,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:39:45,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2019-01-18 17:39:45,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:45,785 INFO L225 Difference]: With dead ends: 158 [2019-01-18 17:39:45,785 INFO L226 Difference]: Without dead ends: 156 [2019-01-18 17:39:45,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-01-18 17:39:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-01-18 17:39:45,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 128. [2019-01-18 17:39:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-01-18 17:39:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 760 transitions. [2019-01-18 17:39:45,808 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 760 transitions. Word has length 5 [2019-01-18 17:39:45,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:45,808 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 760 transitions. [2019-01-18 17:39:45,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-01-18 17:39:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 760 transitions. [2019-01-18 17:39:45,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:45,809 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:45,809 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:39:45,810 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:45,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:45,810 INFO L82 PathProgramCache]: Analyzing trace with hash 28831546, now seen corresponding path program 2 times [2019-01-18 17:39:45,810 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:45,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:45,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:45,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:45,811 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:46,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:46,020 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:46,020 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:39:46,021 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:39:46,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:46,021 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 [2019-01-18 17:39:46,029 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 17:39:46,030 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 17:39:46,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 17:39:46,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:39:46,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:46,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,069 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 68 treesize of output 71 [2019-01-18 17:39:46,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,108 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 58 treesize of output 67 [2019-01-18 17:39:46,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,150 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 46 treesize of output 72 [2019-01-18 17:39:46,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,208 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 37 treesize of output 80 [2019-01-18 17:39:46,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:39:46,281 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:46,308 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:46,335 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:46,363 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:46,388 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:46,423 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 21 treesize of output 24 [2019-01-18 17:39:46,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:39:46,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:39:46,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:46,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:39:46,437 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:39:46,438 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:46,473 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:46,493 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:46,509 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:46,521 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:46,533 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:46,578 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:46,578 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 17:39:46,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:39:46,609 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:46,653 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:46,653 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:46,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,684 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-18 17:39:46,685 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:46,757 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:46,758 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-18 17:39:46,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:46,831 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:46,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-18 17:39:46,832 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:46,900 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. [2019-01-18 17:39:46,900 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-18 17:39:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:46,924 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:46,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:46,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-01-18 17:39:46,975 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:46,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:39:46,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:39:46,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-01-18 17:39:46,976 INFO L87 Difference]: Start difference. First operand 128 states and 760 transitions. Second operand 10 states. [2019-01-18 17:39:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:47,701 INFO L93 Difference]: Finished difference Result 241 states and 1191 transitions. [2019-01-18 17:39:47,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 17:39:47,702 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:39:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:47,706 INFO L225 Difference]: With dead ends: 241 [2019-01-18 17:39:47,706 INFO L226 Difference]: Without dead ends: 235 [2019-01-18 17:39:47,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2019-01-18 17:39:47,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-01-18 17:39:47,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 164. [2019-01-18 17:39:47,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-01-18 17:39:47,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 1007 transitions. [2019-01-18 17:39:47,744 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 1007 transitions. Word has length 5 [2019-01-18 17:39:47,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:47,745 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 1007 transitions. [2019-01-18 17:39:47,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:39:47,745 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 1007 transitions. [2019-01-18 17:39:47,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:47,746 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:47,746 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:39:47,746 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:47,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:47,747 INFO L82 PathProgramCache]: Analyzing trace with hash 28831858, now seen corresponding path program 1 times [2019-01-18 17:39:47,747 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:47,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:47,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:39:47,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:47,748 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:39:48,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:48,126 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:48,126 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:39:48,126 INFO L207 CegarAbsIntRunner]: [0], [6], [24], [28], [29] [2019-01-18 17:39:48,128 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:48,128 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:48,130 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:48,130 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:48,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:48,131 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:48,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:48,131 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 [2019-01-18 17:39:48,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:48,150 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:48,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:48,193 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 21 treesize of output 24 [2019-01-18 17:39:48,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:39:48,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,201 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 26 treesize of output 40 [2019-01-18 17:39:48,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,208 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 28 treesize of output 54 [2019-01-18 17:39:48,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,216 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 30 treesize of output 72 [2019-01-18 17:39:48,224 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:48,224 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,265 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,288 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,332 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,346 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,359 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,388 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 48 treesize of output 54 [2019-01-18 17:39:48,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,422 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 41 treesize of output 53 [2019-01-18 17:39:48,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,461 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 32 treesize of output 61 [2019-01-18 17:39:48,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,510 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:48,511 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,525 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,539 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,553 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:48,586 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:48,586 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:48,824 WARN L181 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-18 17:39:48,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:48,968 INFO L303 Elim1Store]: Index analysis took 140 ms [2019-01-18 17:39:48,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-18 17:39:48,977 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:39:49,081 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-18 17:39:49,082 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:106 [2019-01-18 17:39:49,287 WARN L181 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2019-01-18 17:39:49,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,296 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:49,296 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 72 [2019-01-18 17:39:49,297 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:49,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:49,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 107 [2019-01-18 17:39:49,420 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 16 xjuncts. [2019-01-18 17:39:49,745 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-01-18 17:39:49,745 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:126, output treesize:280 [2019-01-18 17:39:49,953 WARN L181 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 90 [2019-01-18 17:39:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:49,956 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:50,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:50,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:39:50,004 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:50,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:50,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:50,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:39:50,004 INFO L87 Difference]: Start difference. First operand 164 states and 1007 transitions. Second operand 8 states. [2019-01-18 17:39:50,476 WARN L181 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2019-01-18 17:39:50,973 WARN L181 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2019-01-18 17:39:51,245 WARN L181 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2019-01-18 17:39:51,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:51,522 INFO L93 Difference]: Finished difference Result 208 states and 1150 transitions. [2019-01-18 17:39:51,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:39:51,523 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:39:51,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:51,526 INFO L225 Difference]: With dead ends: 208 [2019-01-18 17:39:51,526 INFO L226 Difference]: Without dead ends: 207 [2019-01-18 17:39:51,526 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:39:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-01-18 17:39:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 181. [2019-01-18 17:39:51,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-01-18 17:39:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 1128 transitions. [2019-01-18 17:39:51,565 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 1128 transitions. Word has length 5 [2019-01-18 17:39:51,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:51,565 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 1128 transitions. [2019-01-18 17:39:51,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 1128 transitions. [2019-01-18 17:39:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:51,566 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:51,566 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:39:51,566 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:51,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:51,567 INFO L82 PathProgramCache]: Analyzing trace with hash 28818278, now seen corresponding path program 1 times [2019-01-18 17:39:51,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:51,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:51,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:51,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:51,568 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:51,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:51,670 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:51,670 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:39:51,670 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [24], [27] [2019-01-18 17:39:51,671 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:51,671 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:51,673 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:51,674 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:39:51,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:51,674 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:51,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:51,674 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 [2019-01-18 17:39:51,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:51,683 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:51,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:51,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,707 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 48 treesize of output 54 [2019-01-18 17:39:51,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,739 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 41 treesize of output 53 [2019-01-18 17:39:51,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,781 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 32 treesize of output 61 [2019-01-18 17:39:51,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:51,828 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:51,828 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:51,849 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:51,869 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:51,893 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:51,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:39:51,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 30 [2019-01-18 17:39:51,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:39:51,928 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:51,933 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 30 treesize of output 72 [2019-01-18 17:39:51,946 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:51,946 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:51,984 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:52,002 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:52,020 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:52,032 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:52,042 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:52,078 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:52,078 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:52,323 WARN L181 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-18 17:39:52,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:52,343 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-18 17:39:52,344 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:39:52,460 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2019-01-18 17:39:52,460 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:109 [2019-01-18 17:39:52,730 WARN L181 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2019-01-18 17:39:52,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:52,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:52,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:52,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:52,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:52,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:52,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:52,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:52,759 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 103 [2019-01-18 17:39:52,760 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:39:52,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:52,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:52,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:52,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:52,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:52,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:52,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:52,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 89 [2019-01-18 17:39:52,926 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:53,010 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2019-01-18 17:39:53,010 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:129, output treesize:125 [2019-01-18 17:39:53,234 WARN L181 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2019-01-18 17:39:53,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,266 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:53,290 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 0 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 118 [2019-01-18 17:39:53,294 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2019-01-18 17:39:53,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,589 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:53,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,591 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2019-01-18 17:39:53,592 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:53,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:53,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 110 [2019-01-18 17:39:53,751 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:53,930 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-01-18 17:39:53,931 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:156, output treesize:242 [2019-01-18 17:39:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:54,053 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:54,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:54,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:39:54,105 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:54,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:39:54,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:39:54,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:39:54,106 INFO L87 Difference]: Start difference. First operand 181 states and 1128 transitions. Second operand 10 states. [2019-01-18 17:39:54,882 WARN L181 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2019-01-18 17:39:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:55,442 INFO L93 Difference]: Finished difference Result 280 states and 1534 transitions. [2019-01-18 17:39:55,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-18 17:39:55,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:39:55,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:55,446 INFO L225 Difference]: With dead ends: 280 [2019-01-18 17:39:55,447 INFO L226 Difference]: Without dead ends: 279 [2019-01-18 17:39:55,447 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2019-01-18 17:39:55,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2019-01-18 17:39:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 185. [2019-01-18 17:39:55,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-01-18 17:39:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 1156 transitions. [2019-01-18 17:39:55,486 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 1156 transitions. Word has length 5 [2019-01-18 17:39:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:55,486 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 1156 transitions. [2019-01-18 17:39:55,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:39:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 1156 transitions. [2019-01-18 17:39:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:55,487 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:55,487 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:39:55,487 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:55,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:55,487 INFO L82 PathProgramCache]: Analyzing trace with hash 28835766, now seen corresponding path program 1 times [2019-01-18 17:39:55,487 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:55,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:55,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:55,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:55,488 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:39:55,549 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 17:39:55,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-18 17:39:55,549 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:39:55,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 17:39:55,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 17:39:55,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-01-18 17:39:55,550 INFO L87 Difference]: Start difference. First operand 185 states and 1156 transitions. Second operand 4 states. [2019-01-18 17:39:55,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:55,658 INFO L93 Difference]: Finished difference Result 201 states and 1179 transitions. [2019-01-18 17:39:55,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 17:39:55,659 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-01-18 17:39:55,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:55,662 INFO L225 Difference]: With dead ends: 201 [2019-01-18 17:39:55,662 INFO L226 Difference]: Without dead ends: 198 [2019-01-18 17:39:55,663 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-01-18 17:39:55,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-01-18 17:39:55,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2019-01-18 17:39:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-01-18 17:39:55,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 1164 transitions. [2019-01-18 17:39:55,703 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 1164 transitions. Word has length 5 [2019-01-18 17:39:55,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:55,703 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 1164 transitions. [2019-01-18 17:39:55,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 17:39:55,703 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 1164 transitions. [2019-01-18 17:39:55,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:55,704 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:55,704 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:39:55,704 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:55,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:55,704 INFO L82 PathProgramCache]: Analyzing trace with hash 28822248, now seen corresponding path program 1 times [2019-01-18 17:39:55,705 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:55,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:55,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:55,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:55,706 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:39:55,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:55,789 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:55,789 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:39:55,789 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [28], [29] [2019-01-18 17:39:55,790 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:55,790 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:55,792 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:55,792 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:55,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:55,793 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:55,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:55,793 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:55,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:55,801 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:55,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:55,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,832 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 48 treesize of output 54 [2019-01-18 17:39:55,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,866 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 41 treesize of output 53 [2019-01-18 17:39:55,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,906 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 32 treesize of output 61 [2019-01-18 17:39:55,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:55,956 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:39:55,957 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:55,978 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:55,998 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,018 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,044 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:39:56,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 30 [2019-01-18 17:39:56,048 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:39:56,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:56,057 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 30 treesize of output 72 [2019-01-18 17:39:56,063 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:39:56,063 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,088 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,107 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,122 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,135 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,146 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,177 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:56,177 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 17:39:56,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,217 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:39:56,217 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,246 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:56,246 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 17:39:56,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,274 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:56,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-18 17:39:56,275 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,303 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:56,303 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:42 [2019-01-18 17:39:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:56,324 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:56,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:56,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:39:56,362 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:56,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:56,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:56,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:39:56,363 INFO L87 Difference]: Start difference. First operand 187 states and 1164 transitions. Second operand 8 states. [2019-01-18 17:39:56,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:56,668 INFO L93 Difference]: Finished difference Result 208 states and 1202 transitions. [2019-01-18 17:39:56,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:39:56,669 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:39:56,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:56,671 INFO L225 Difference]: With dead ends: 208 [2019-01-18 17:39:56,672 INFO L226 Difference]: Without dead ends: 207 [2019-01-18 17:39:56,672 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:39:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-01-18 17:39:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2019-01-18 17:39:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-01-18 17:39:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 1178 transitions. [2019-01-18 17:39:56,709 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 1178 transitions. Word has length 5 [2019-01-18 17:39:56,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:56,709 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 1178 transitions. [2019-01-18 17:39:56,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 1178 transitions. [2019-01-18 17:39:56,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:56,710 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:56,710 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:39:56,711 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:56,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:56,711 INFO L82 PathProgramCache]: Analyzing trace with hash 29302748, now seen corresponding path program 1 times [2019-01-18 17:39:56,711 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:56,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:56,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:56,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:56,712 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:56,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:56,834 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:56,834 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:39:56,834 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [28], [29] [2019-01-18 17:39:56,835 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:39:56,836 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:39:56,838 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:39:56,838 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:39:56,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:56,838 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:39:56,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:56,839 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:56,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:56,848 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:39:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:56,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:56,856 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 43 treesize of output 39 [2019-01-18 17:39:56,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,874 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 36 treesize of output 49 [2019-01-18 17:39:56,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,910 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 32 treesize of output 57 [2019-01-18 17:39:56,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:56,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:39:56,959 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,979 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:56,999 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,022 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:39:57,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 26 [2019-01-18 17:39:57,057 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 17:39:57,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 17:39:57,070 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 30 treesize of output 68 [2019-01-18 17:39:57,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:39:57,087 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,122 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,139 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,154 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,168 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,179 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,208 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:57,209 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-18 17:39:57,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,251 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2019-01-18 17:39:57,251 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,283 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:57,283 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-01-18 17:39:57,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:57,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-18 17:39:57,314 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:57,342 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:57,342 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:34 [2019-01-18 17:39:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:57,359 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:57,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:57,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:39:57,397 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:57,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:39:57,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:39:57,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:39:57,398 INFO L87 Difference]: Start difference. First operand 189 states and 1178 transitions. Second operand 8 states. [2019-01-18 17:39:57,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:39:57,690 INFO L93 Difference]: Finished difference Result 210 states and 1196 transitions. [2019-01-18 17:39:57,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:39:57,690 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:39:57,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:39:57,693 INFO L225 Difference]: With dead ends: 210 [2019-01-18 17:39:57,693 INFO L226 Difference]: Without dead ends: 208 [2019-01-18 17:39:57,693 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:39:57,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-01-18 17:39:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2019-01-18 17:39:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-01-18 17:39:57,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 1179 transitions. [2019-01-18 17:39:57,726 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 1179 transitions. Word has length 5 [2019-01-18 17:39:57,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:39:57,726 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 1179 transitions. [2019-01-18 17:39:57,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:39:57,726 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 1179 transitions. [2019-01-18 17:39:57,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:39:57,727 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:39:57,727 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:39:57,727 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:39:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:39:57,728 INFO L82 PathProgramCache]: Analyzing trace with hash 29308202, now seen corresponding path program 2 times [2019-01-18 17:39:57,728 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:39:57,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:57,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:39:57,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:39:57,729 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:39:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:39:57,882 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-18 17:39:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:58,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:58,132 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:39:58,132 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:39:58,132 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:39:58,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:39:58,132 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:39:58,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 17:39:58,143 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 17:39:58,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 17:39:58,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:39:58,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:39:58,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,182 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 68 treesize of output 71 [2019-01-18 17:39:58,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,219 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 58 treesize of output 67 [2019-01-18 17:39:58,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,268 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 46 treesize of output 72 [2019-01-18 17:39:58,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,325 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 37 treesize of output 80 [2019-01-18 17:39:58,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:58,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:39:58,425 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:58,454 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:58,482 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:58,513 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:58,545 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:58,584 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 21 treesize of output 24 [2019-01-18 17:39:58,586 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:39:58,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:39:58,591 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:39:58,593 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:39:58,596 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:39:58,597 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:58,952 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:58,972 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:58,987 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,000 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,011 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,055 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:59,055 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 17:39:59,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,091 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:39:59,091 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,135 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:59,135 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:39:59,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,172 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-18 17:39:59,172 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,219 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:39:59,220 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-18 17:39:59,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:39:59,259 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:39:59,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 124 [2019-01-18 17:39:59,261 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:39:59,316 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. [2019-01-18 17:39:59,316 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-18 17:39:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:59,340 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:39:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:39:59,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:39:59,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:39:59,397 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:39:59,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:39:59,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:39:59,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:39:59,398 INFO L87 Difference]: Start difference. First operand 191 states and 1179 transitions. Second operand 10 states. [2019-01-18 17:40:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:00,909 INFO L93 Difference]: Finished difference Result 242 states and 1308 transitions. [2019-01-18 17:40:00,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:40:00,910 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:40:00,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:00,913 INFO L225 Difference]: With dead ends: 242 [2019-01-18 17:40:00,913 INFO L226 Difference]: Without dead ends: 240 [2019-01-18 17:40:00,914 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:40:00,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-01-18 17:40:00,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2019-01-18 17:40:00,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-01-18 17:40:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 1251 transitions. [2019-01-18 17:40:00,946 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 1251 transitions. Word has length 5 [2019-01-18 17:40:00,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:00,946 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 1251 transitions. [2019-01-18 17:40:00,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:40:00,946 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 1251 transitions. [2019-01-18 17:40:00,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:00,947 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:00,947 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:00,947 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:00,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:00,947 INFO L82 PathProgramCache]: Analyzing trace with hash 29307954, now seen corresponding path program 1 times [2019-01-18 17:40:00,947 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:00,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:00,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:40:00,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:00,948 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:01,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:01,022 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:01,023 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:40:01,023 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [24], [27] [2019-01-18 17:40:01,024 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:01,024 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:01,027 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:01,027 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:40:01,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:01,027 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:01,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:01,028 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:01,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:01,038 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:01,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:01,074 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 21 treesize of output 24 [2019-01-18 17:40:01,078 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 24 treesize of output 30 [2019-01-18 17:40:01,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,085 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 26 treesize of output 40 [2019-01-18 17:40:01,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,090 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 28 treesize of output 54 [2019-01-18 17:40:01,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:40:01,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,107 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:40:01,107 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,146 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,168 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,185 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,198 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,211 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,244 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 68 treesize of output 71 [2019-01-18 17:40:01,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,283 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 58 treesize of output 67 [2019-01-18 17:40:01,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,328 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 46 treesize of output 72 [2019-01-18 17:40:01,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,383 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 37 treesize of output 80 [2019-01-18 17:40:01,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,453 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:40:01,454 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,479 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,503 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,571 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,594 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,637 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:01,638 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 17:40:01,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,669 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:40:01,670 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,710 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:01,710 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:01,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,743 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-18 17:40:01,744 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,789 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:01,790 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-18 17:40:01,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:01,827 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:01,828 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 134 [2019-01-18 17:40:01,829 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:01,881 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. [2019-01-18 17:40:01,881 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-18 17:40:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:01,903 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:01,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:01,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:40:01,959 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:01,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:40:01,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:40:01,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:40:01,959 INFO L87 Difference]: Start difference. First operand 202 states and 1251 transitions. Second operand 10 states. [2019-01-18 17:40:02,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:02,596 INFO L93 Difference]: Finished difference Result 249 states and 1369 transitions. [2019-01-18 17:40:02,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:40:02,596 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:40:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:02,599 INFO L225 Difference]: With dead ends: 249 [2019-01-18 17:40:02,599 INFO L226 Difference]: Without dead ends: 247 [2019-01-18 17:40:02,600 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:40:02,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-01-18 17:40:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 212. [2019-01-18 17:40:02,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-01-18 17:40:02,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 1326 transitions. [2019-01-18 17:40:02,632 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 1326 transitions. Word has length 5 [2019-01-18 17:40:02,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:02,632 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 1326 transitions. [2019-01-18 17:40:02,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:40:02,632 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 1326 transitions. [2019-01-18 17:40:02,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:02,633 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:02,633 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:02,633 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:02,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:02,634 INFO L82 PathProgramCache]: Analyzing trace with hash 29294624, now seen corresponding path program 1 times [2019-01-18 17:40:02,634 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:02,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:02,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:02,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:02,635 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:02,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:02,759 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:02,759 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:40:02,759 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [22], [27] [2019-01-18 17:40:02,760 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:02,761 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:02,763 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:02,763 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:40:02,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:02,764 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:02,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:02,764 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:02,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:02,773 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:02,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:02,803 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 21 treesize of output 24 [2019-01-18 17:40:02,805 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 24 treesize of output 30 [2019-01-18 17:40:02,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,824 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 26 treesize of output 40 [2019-01-18 17:40:02,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,834 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 28 treesize of output 54 [2019-01-18 17:40:02,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:40:02,855 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:40:02,855 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:02,883 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:02,905 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:02,922 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:02,935 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:02,948 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:02,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:02,975 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 48 treesize of output 54 [2019-01-18 17:40:03,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,007 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 41 treesize of output 53 [2019-01-18 17:40:03,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,045 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 32 treesize of output 61 [2019-01-18 17:40:03,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,093 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:40:03,093 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:03,109 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:03,124 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:03,139 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:03,170 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:03,171 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 17:40:03,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,226 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:40:03,226 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:03,254 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:03,255 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-18 17:40:03,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,288 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-01-18 17:40:03,289 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:03,323 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:03,323 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:38 [2019-01-18 17:40:03,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:03,359 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:03,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-01-18 17:40:03,360 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:03,413 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:03,414 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2019-01-18 17:40:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:03,432 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:03,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:03,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:40:03,489 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:03,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:40:03,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:40:03,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:40:03,489 INFO L87 Difference]: Start difference. First operand 212 states and 1326 transitions. Second operand 10 states. [2019-01-18 17:40:06,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:06,033 INFO L93 Difference]: Finished difference Result 260 states and 1437 transitions. [2019-01-18 17:40:06,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:40:06,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:40:06,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:06,037 INFO L225 Difference]: With dead ends: 260 [2019-01-18 17:40:06,037 INFO L226 Difference]: Without dead ends: 258 [2019-01-18 17:40:06,037 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=109, Invalid=196, Unknown=1, NotChecked=0, Total=306 [2019-01-18 17:40:06,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-01-18 17:40:06,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 221. [2019-01-18 17:40:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-01-18 17:40:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 1389 transitions. [2019-01-18 17:40:06,071 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 1389 transitions. Word has length 5 [2019-01-18 17:40:06,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:06,071 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 1389 transitions. [2019-01-18 17:40:06,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:40:06,072 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 1389 transitions. [2019-01-18 17:40:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:06,072 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:06,072 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:06,072 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:06,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:06,073 INFO L82 PathProgramCache]: Analyzing trace with hash 29298904, now seen corresponding path program 1 times [2019-01-18 17:40:06,073 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:06,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:06,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:06,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:06,073 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:06,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:06,198 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:06,198 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:40:06,198 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [28], [29] [2019-01-18 17:40:06,199 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:06,199 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:06,202 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:06,202 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:40:06,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:06,202 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:06,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:06,203 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:06,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:06,212 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:06,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:06,238 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 21 treesize of output 24 [2019-01-18 17:40:06,263 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 24 treesize of output 26 [2019-01-18 17:40:06,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,267 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 26 treesize of output 36 [2019-01-18 17:40:06,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,275 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 28 treesize of output 50 [2019-01-18 17:40:06,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,284 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 30 treesize of output 68 [2019-01-18 17:40:06,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,293 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:40:06,294 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,347 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,366 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,380 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,392 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,405 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,431 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 63 treesize of output 56 [2019-01-18 17:40:06,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,450 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 53 treesize of output 63 [2019-01-18 17:40:06,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,491 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 46 treesize of output 68 [2019-01-18 17:40:06,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,542 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 37 treesize of output 76 [2019-01-18 17:40:06,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:40:06,607 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,630 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,653 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,676 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,701 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,743 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:06,743 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-18 17:40:06,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,769 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-18 17:40:06,769 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,810 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:06,810 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-01-18 17:40:06,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:06,841 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:06,842 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 101 [2019-01-18 17:40:06,843 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:06,885 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. [2019-01-18 17:40:06,885 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:77, output treesize:55 [2019-01-18 17:40:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:06,903 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:06,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:06,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:40:06,941 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:06,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:06,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:06,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:06,942 INFO L87 Difference]: Start difference. First operand 221 states and 1389 transitions. Second operand 8 states. [2019-01-18 17:40:07,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:07,253 INFO L93 Difference]: Finished difference Result 244 states and 1417 transitions. [2019-01-18 17:40:07,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:40:07,253 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:40:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:07,256 INFO L225 Difference]: With dead ends: 244 [2019-01-18 17:40:07,257 INFO L226 Difference]: Without dead ends: 243 [2019-01-18 17:40:07,257 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:40:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-01-18 17:40:07,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2019-01-18 17:40:07,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-01-18 17:40:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 1389 transitions. [2019-01-18 17:40:07,302 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 1389 transitions. Word has length 5 [2019-01-18 17:40:07,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:07,302 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 1389 transitions. [2019-01-18 17:40:07,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 1389 transitions. [2019-01-18 17:40:07,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:07,304 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:07,304 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:07,304 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:07,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:07,304 INFO L82 PathProgramCache]: Analyzing trace with hash 29366174, now seen corresponding path program 1 times [2019-01-18 17:40:07,304 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:07,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:07,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:07,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:07,305 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:07,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:07,406 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:07,406 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:40:07,406 INFO L207 CegarAbsIntRunner]: [0], [22], [24], [28], [29] [2019-01-18 17:40:07,407 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:07,407 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:07,408 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:07,408 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:40:07,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:07,410 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:07,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:07,410 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:07,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:07,418 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:07,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:07,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:40:07,433 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 24 treesize of output 26 [2019-01-18 17:40:07,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,440 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 26 treesize of output 36 [2019-01-18 17:40:07,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,451 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 28 treesize of output 50 [2019-01-18 17:40:07,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,464 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 30 treesize of output 68 [2019-01-18 17:40:07,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:40:07,474 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,503 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,524 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,540 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,554 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,565 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,588 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 43 treesize of output 39 [2019-01-18 17:40:07,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,606 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 36 treesize of output 49 [2019-01-18 17:40:07,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,639 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 32 treesize of output 57 [2019-01-18 17:40:07,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,683 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:40:07,684 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,698 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,712 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,726 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:07,754 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:07,755 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-18 17:40:07,941 WARN L181 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-01-18 17:40:07,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:07,993 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 87 [2019-01-18 17:40:08,000 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2019-01-18 17:40:08,325 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 21 dim-0 vars, and 7 xjuncts. [2019-01-18 17:40:08,325 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:425 [2019-01-18 17:40:08,469 WARN L181 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 90 [2019-01-18 17:40:08,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,478 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:08,479 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 88 [2019-01-18 17:40:08,479 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:08,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 92 [2019-01-18 17:40:08,589 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:08,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:08,683 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 71 [2019-01-18 17:40:08,684 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:08,753 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2019-01-18 17:40:08,753 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:194, output treesize:126 [2019-01-18 17:40:09,008 WARN L181 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2019-01-18 17:40:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:09,011 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:09,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:09,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:40:09,068 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:09,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:09,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:09,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:09,068 INFO L87 Difference]: Start difference. First operand 221 states and 1389 transitions. Second operand 8 states. [2019-01-18 17:40:09,485 WARN L181 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2019-01-18 17:40:18,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:18,391 INFO L93 Difference]: Finished difference Result 273 states and 1446 transitions. [2019-01-18 17:40:18,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 17:40:18,392 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:40:18,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:18,395 INFO L225 Difference]: With dead ends: 273 [2019-01-18 17:40:18,395 INFO L226 Difference]: Without dead ends: 272 [2019-01-18 17:40:18,395 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2019-01-18 17:40:18,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-01-18 17:40:18,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 222. [2019-01-18 17:40:18,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-01-18 17:40:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 1396 transitions. [2019-01-18 17:40:18,429 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 1396 transitions. Word has length 5 [2019-01-18 17:40:18,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:18,429 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 1396 transitions. [2019-01-18 17:40:18,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:18,430 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 1396 transitions. [2019-01-18 17:40:18,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:18,430 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:18,430 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:18,430 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:18,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:18,431 INFO L82 PathProgramCache]: Analyzing trace with hash 29353958, now seen corresponding path program 2 times [2019-01-18 17:40:18,431 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:18,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:18,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:18,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:18,432 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:18,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:18,525 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:18,525 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:40:18,525 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:40:18,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:18,526 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:18,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 17:40:18,535 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 17:40:18,541 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 17:40:18,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:40:18,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:18,562 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 21 treesize of output 24 [2019-01-18 17:40:18,565 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:40:18,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,570 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 26 treesize of output 40 [2019-01-18 17:40:18,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,577 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 28 treesize of output 54 [2019-01-18 17:40:18,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,585 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 30 treesize of output 72 [2019-01-18 17:40:18,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,594 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:40:18,595 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:18,632 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:18,654 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:18,672 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:18,685 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:18,698 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:18,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,729 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 68 treesize of output 71 [2019-01-18 17:40:18,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,766 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 58 treesize of output 67 [2019-01-18 17:40:18,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,811 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 46 treesize of output 72 [2019-01-18 17:40:18,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,864 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 37 treesize of output 80 [2019-01-18 17:40:18,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:18,932 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:40:18,933 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:18,958 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:18,982 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:19,006 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:19,031 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:19,074 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:19,075 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 17:40:19,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:40:19,103 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:19,145 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:19,145 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:19,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,176 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:19,177 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2019-01-18 17:40:19,178 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:19,223 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. [2019-01-18 17:40:19,223 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-18 17:40:19,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:19,261 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2019-01-18 17:40:19,262 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:19,307 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. [2019-01-18 17:40:19,307 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2019-01-18 17:40:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:19,326 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:19,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:19,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:40:19,372 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:19,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:40:19,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:40:19,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:40:19,373 INFO L87 Difference]: Start difference. First operand 222 states and 1396 transitions. Second operand 10 states. [2019-01-18 17:40:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:20,087 INFO L93 Difference]: Finished difference Result 274 states and 1519 transitions. [2019-01-18 17:40:20,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:40:20,087 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:40:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:20,091 INFO L225 Difference]: With dead ends: 274 [2019-01-18 17:40:20,091 INFO L226 Difference]: Without dead ends: 273 [2019-01-18 17:40:20,091 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:40:20,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2019-01-18 17:40:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 225. [2019-01-18 17:40:20,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-01-18 17:40:20,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 1417 transitions. [2019-01-18 17:40:20,131 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 1417 transitions. Word has length 5 [2019-01-18 17:40:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:20,132 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 1417 transitions. [2019-01-18 17:40:20,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:40:20,132 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 1417 transitions. [2019-01-18 17:40:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:20,133 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:20,133 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:20,133 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash 29372004, now seen corresponding path program 1 times [2019-01-18 17:40:20,133 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:20,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:20,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:40:20,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:20,134 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:20,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:20,270 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:20,270 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:40:20,270 INFO L207 CegarAbsIntRunner]: [0], [24], [28], [30], [31] [2019-01-18 17:40:20,271 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:20,271 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:20,273 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:20,274 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:40:20,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:20,274 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:20,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:20,274 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:20,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:20,283 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:20,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:20,292 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 63 treesize of output 56 [2019-01-18 17:40:20,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,309 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 53 treesize of output 63 [2019-01-18 17:40:20,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,348 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 46 treesize of output 68 [2019-01-18 17:40:20,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,400 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 37 treesize of output 76 [2019-01-18 17:40:20,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,466 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:40:20,467 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:20,491 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:20,515 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:20,538 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:20,564 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:20,595 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:40:20,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-18 17:40:20,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 17:40:20,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 17:40:20,609 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 17:40:20,614 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:40:20,614 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:20,647 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:20,664 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:20,678 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:20,690 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:20,701 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:20,741 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. [2019-01-18 17:40:20,742 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:84, output treesize:87 [2019-01-18 17:40:20,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:20,762 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-18 17:40:20,762 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:20,804 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. [2019-01-18 17:40:20,804 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:97, output treesize:67 [2019-01-18 17:40:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:20,822 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:20,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:20,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 17:40:20,851 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:20,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 17:40:20,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 17:40:20,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 17:40:20,852 INFO L87 Difference]: Start difference. First operand 225 states and 1417 transitions. Second operand 6 states. [2019-01-18 17:40:21,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:21,052 INFO L93 Difference]: Finished difference Result 242 states and 1433 transitions. [2019-01-18 17:40:21,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 17:40:21,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2019-01-18 17:40:21,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:21,056 INFO L225 Difference]: With dead ends: 242 [2019-01-18 17:40:21,056 INFO L226 Difference]: Without dead ends: 241 [2019-01-18 17:40:21,056 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 17:40:21,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-01-18 17:40:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 225. [2019-01-18 17:40:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-01-18 17:40:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 1417 transitions. [2019-01-18 17:40:21,092 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 1417 transitions. Word has length 5 [2019-01-18 17:40:21,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:21,092 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 1417 transitions. [2019-01-18 17:40:21,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 17:40:21,092 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 1417 transitions. [2019-01-18 17:40:21,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:21,093 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:21,093 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:21,093 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:21,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:21,093 INFO L82 PathProgramCache]: Analyzing trace with hash 29357926, now seen corresponding path program 1 times [2019-01-18 17:40:21,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:21,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:21,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:21,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:21,094 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:21,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:21,187 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:21,187 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:40:21,187 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [24], [27] [2019-01-18 17:40:21,188 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:21,188 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:21,190 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:21,190 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:40:21,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:21,190 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:21,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:21,190 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:21,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:21,200 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:21,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:21,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,230 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 68 treesize of output 71 [2019-01-18 17:40:21,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,268 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 58 treesize of output 67 [2019-01-18 17:40:21,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,312 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 46 treesize of output 72 [2019-01-18 17:40:21,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,367 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 37 treesize of output 80 [2019-01-18 17:40:21,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,437 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:40:21,438 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:21,463 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:21,489 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:21,515 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:21,541 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:21,575 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 21 treesize of output 24 [2019-01-18 17:40:21,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:40:21,582 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:40:21,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:40:21,586 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:40:21,589 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:40:21,589 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:21,623 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:21,652 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:21,666 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:21,678 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:21,689 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:21,730 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:21,731 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 17:40:21,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,764 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:40:21,764 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:21,807 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:21,807 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:21,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-18 17:40:21,841 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:21,886 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:21,887 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-18 17:40:21,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:21,925 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:21,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 128 [2019-01-18 17:40:21,926 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:21,973 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. [2019-01-18 17:40:21,974 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-18 17:40:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:21,996 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:22,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:22,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:40:22,049 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:22,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:40:22,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:40:22,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:40:22,050 INFO L87 Difference]: Start difference. First operand 225 states and 1417 transitions. Second operand 10 states. [2019-01-18 17:40:22,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:22,679 INFO L93 Difference]: Finished difference Result 276 states and 1527 transitions. [2019-01-18 17:40:22,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:40:22,680 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-18 17:40:22,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:22,683 INFO L225 Difference]: With dead ends: 276 [2019-01-18 17:40:22,683 INFO L226 Difference]: Without dead ends: 274 [2019-01-18 17:40:22,683 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:40:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-01-18 17:40:22,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 234. [2019-01-18 17:40:22,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-01-18 17:40:22,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 1480 transitions. [2019-01-18 17:40:22,728 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 1480 transitions. Word has length 5 [2019-01-18 17:40:22,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:22,728 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 1480 transitions. [2019-01-18 17:40:22,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:40:22,728 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 1480 transitions. [2019-01-18 17:40:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:22,729 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:22,729 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:22,729 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:22,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:22,729 INFO L82 PathProgramCache]: Analyzing trace with hash 28933724, now seen corresponding path program 1 times [2019-01-18 17:40:22,730 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:22,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:22,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:22,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:22,730 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:22,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:22,789 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:22,789 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:40:22,789 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [28], [29] [2019-01-18 17:40:22,790 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:22,790 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:22,793 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:22,793 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:40:22,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:22,793 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:22,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:22,793 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:22,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:22,810 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:22,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:22,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:22,835 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 48 treesize of output 54 [2019-01-18 17:40:22,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:22,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:22,866 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 41 treesize of output 53 [2019-01-18 17:40:22,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:22,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:22,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:22,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:22,903 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 32 treesize of output 61 [2019-01-18 17:40:22,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:22,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:22,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:22,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:22,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:22,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:22,955 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:40:22,956 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:22,972 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:22,988 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:23,004 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:23,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:40:23,030 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 30 [2019-01-18 17:40:23,035 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:40:23,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:40:23,040 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 30 treesize of output 72 [2019-01-18 17:40:23,046 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:40:23,047 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:23,071 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:23,090 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:23,105 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:23,117 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:23,128 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:23,159 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. [2019-01-18 17:40:23,160 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-18 17:40:23,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:23,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:40:23,246 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:23,473 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:23,474 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 17:40:23,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:23,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:23,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:23,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:23,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:23,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:23,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:23,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 17:40:23,497 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:23,529 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:23,530 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2019-01-18 17:40:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:23,546 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:23,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:23,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:40:23,583 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:23,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:23,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:23,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:23,584 INFO L87 Difference]: Start difference. First operand 234 states and 1480 transitions. Second operand 8 states. [2019-01-18 17:40:23,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:23,960 INFO L93 Difference]: Finished difference Result 288 states and 1635 transitions. [2019-01-18 17:40:23,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:40:23,961 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:40:23,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:23,964 INFO L225 Difference]: With dead ends: 288 [2019-01-18 17:40:23,964 INFO L226 Difference]: Without dead ends: 287 [2019-01-18 17:40:23,965 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-18 17:40:23,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2019-01-18 17:40:24,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 250. [2019-01-18 17:40:24,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2019-01-18 17:40:24,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 1595 transitions. [2019-01-18 17:40:24,009 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 1595 transitions. Word has length 5 [2019-01-18 17:40:24,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:24,009 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 1595 transitions. [2019-01-18 17:40:24,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 1595 transitions. [2019-01-18 17:40:24,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 17:40:24,010 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:24,010 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 17:40:24,010 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:24,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:24,011 INFO L82 PathProgramCache]: Analyzing trace with hash 28941412, now seen corresponding path program 1 times [2019-01-18 17:40:24,011 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:24,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:24,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:24,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:24,012 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:24,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:24,115 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:24,115 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 17:40:24,115 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [28], [29] [2019-01-18 17:40:24,116 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:24,117 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:24,119 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:24,119 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:40:24,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:24,119 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:24,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:24,119 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:24,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:24,138 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:24,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:24,146 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 21 treesize of output 24 [2019-01-18 17:40:24,150 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 24 treesize of output 26 [2019-01-18 17:40:24,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,170 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 26 treesize of output 36 [2019-01-18 17:40:24,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,185 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 28 treesize of output 50 [2019-01-18 17:40:24,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,195 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 30 treesize of output 68 [2019-01-18 17:40:24,207 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:40:24,207 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:24,232 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:24,252 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:24,266 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:24,278 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:24,289 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:24,311 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 43 treesize of output 39 [2019-01-18 17:40:24,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,326 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 36 treesize of output 49 [2019-01-18 17:40:24,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,360 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 32 treesize of output 57 [2019-01-18 17:40:24,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:40:24,405 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:24,419 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:24,431 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:24,447 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:24,475 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. [2019-01-18 17:40:24,476 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2019-01-18 17:40:24,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,513 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:40:24,514 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:40:24,601 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-18 17:40:24,602 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:92 [2019-01-18 17:40:24,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:24,636 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-01-18 17:40:24,636 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:24,656 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:24,656 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:27 [2019-01-18 17:40:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:24,670 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:24,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:24,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:40:24,703 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:24,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:24,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:24,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:40:24,704 INFO L87 Difference]: Start difference. First operand 250 states and 1595 transitions. Second operand 8 states. [2019-01-18 17:40:25,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:25,080 INFO L93 Difference]: Finished difference Result 319 states and 1823 transitions. [2019-01-18 17:40:25,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:40:25,080 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 17:40:25,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:25,083 INFO L225 Difference]: With dead ends: 319 [2019-01-18 17:40:25,084 INFO L226 Difference]: Without dead ends: 318 [2019-01-18 17:40:25,084 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-01-18 17:40:25,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 276. [2019-01-18 17:40:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2019-01-18 17:40:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 1782 transitions. [2019-01-18 17:40:25,136 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 1782 transitions. Word has length 5 [2019-01-18 17:40:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:25,136 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 1782 transitions. [2019-01-18 17:40:25,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 1782 transitions. [2019-01-18 17:40:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:40:25,137 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:25,137 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-18 17:40:25,138 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:25,138 INFO L82 PathProgramCache]: Analyzing trace with hash 904691166, now seen corresponding path program 1 times [2019-01-18 17:40:25,138 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:25,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:25,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:25,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:25,139 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:40:25,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:25,181 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:25,181 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:40:25,182 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [30], [31] [2019-01-18 17:40:25,185 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:25,185 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:25,187 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:25,187 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 2. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:40:25,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:25,187 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:25,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:25,188 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:25,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:25,197 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:25,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:25,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2019-01-18 17:40:25,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,229 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 36 treesize of output 49 [2019-01-18 17:40:25,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,275 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 32 treesize of output 57 [2019-01-18 17:40:25,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:40:25,361 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:25,380 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:25,398 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:25,420 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:25,447 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:40:25,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 26 [2019-01-18 17:40:25,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 17:40:25,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 17:40:25,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 17:40:25,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:40:25,473 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:25,497 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:25,515 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:25,528 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:25,540 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:25,551 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:25,579 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. [2019-01-18 17:40:25,580 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2019-01-18 17:40:25,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,631 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2019-01-18 17:40:25,631 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:25,655 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:25,655 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-01-18 17:40:25,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:25,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 74 [2019-01-18 17:40:25,680 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:25,708 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:25,709 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:46 [2019-01-18 17:40:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:25,724 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:25,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:25,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2019-01-18 17:40:25,759 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:25,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-01-18 17:40:25,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-01-18 17:40:25,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:40:25,760 INFO L87 Difference]: Start difference. First operand 276 states and 1782 transitions. Second operand 7 states. [2019-01-18 17:40:25,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:25,956 INFO L93 Difference]: Finished difference Result 290 states and 1801 transitions. [2019-01-18 17:40:25,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:40:25,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2019-01-18 17:40:25,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:25,959 INFO L225 Difference]: With dead ends: 290 [2019-01-18 17:40:25,959 INFO L226 Difference]: Without dead ends: 289 [2019-01-18 17:40:25,960 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:25,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2019-01-18 17:40:26,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 276. [2019-01-18 17:40:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2019-01-18 17:40:26,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 1782 transitions. [2019-01-18 17:40:26,023 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 1782 transitions. Word has length 6 [2019-01-18 17:40:26,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:26,023 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 1782 transitions. [2019-01-18 17:40:26,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-01-18 17:40:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 1782 transitions. [2019-01-18 17:40:26,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:40:26,025 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:26,025 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2019-01-18 17:40:26,025 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:26,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:26,026 INFO L82 PathProgramCache]: Analyzing trace with hash 904323688, now seen corresponding path program 3 times [2019-01-18 17:40:26,026 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:26,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:26,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:26,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:26,027 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:40:26,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:26,128 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:26,128 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:40:26,128 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:40:26,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:26,128 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:26,138 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 17:40:26,138 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 17:40:26,144 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 17:40:26,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:40:26,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:26,161 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 21 treesize of output 24 [2019-01-18 17:40:26,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:40:26,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,169 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 26 treesize of output 40 [2019-01-18 17:40:26,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,177 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 28 treesize of output 54 [2019-01-18 17:40:26,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,185 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 30 treesize of output 72 [2019-01-18 17:40:26,199 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:40:26,200 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:26,240 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:26,261 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:26,276 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:26,290 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:26,302 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:26,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,330 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 48 treesize of output 54 [2019-01-18 17:40:26,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,360 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 41 treesize of output 53 [2019-01-18 17:40:26,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,398 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 32 treesize of output 61 [2019-01-18 17:40:26,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:40:26,455 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:26,470 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:26,485 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:26,505 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:26,535 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. [2019-01-18 17:40:26,536 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2019-01-18 17:40:26,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,591 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 17:40:26,592 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:26,618 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:26,618 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 17:40:26,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,648 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 17:40:26,649 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:26,679 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:26,679 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2019-01-18 17:40:26,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,708 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-01-18 17:40:26,709 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:26,743 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:26,744 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:38 [2019-01-18 17:40:26,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:26,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-01-18 17:40:26,776 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:26,813 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:26,813 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:38 [2019-01-18 17:40:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:26,831 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:26,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:26,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2019-01-18 17:40:26,882 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:26,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-18 17:40:26,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-18 17:40:26,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2019-01-18 17:40:26,883 INFO L87 Difference]: Start difference. First operand 276 states and 1782 transitions. Second operand 11 states. [2019-01-18 17:40:27,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:27,417 INFO L93 Difference]: Finished difference Result 423 states and 2543 transitions. [2019-01-18 17:40:27,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-18 17:40:27,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-18 17:40:27,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:27,423 INFO L225 Difference]: With dead ends: 423 [2019-01-18 17:40:27,423 INFO L226 Difference]: Without dead ends: 421 [2019-01-18 17:40:27,423 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:40:27,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2019-01-18 17:40:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 325. [2019-01-18 17:40:27,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2019-01-18 17:40:27,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 2130 transitions. [2019-01-18 17:40:27,493 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 2130 transitions. Word has length 6 [2019-01-18 17:40:27,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:27,493 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 2130 transitions. [2019-01-18 17:40:27,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-18 17:40:27,493 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 2130 transitions. [2019-01-18 17:40:27,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:40:27,494 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:27,495 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:40:27,495 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:27,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:27,495 INFO L82 PathProgramCache]: Analyzing trace with hash 904327844, now seen corresponding path program 1 times [2019-01-18 17:40:27,495 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:27,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:27,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:40:27,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:27,496 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:40:27,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:27,639 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:27,639 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:40:27,639 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [28], [29] [2019-01-18 17:40:27,640 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:27,641 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:27,642 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:27,642 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:40:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:27,642 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:27,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:27,643 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:27,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:27,653 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:27,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:27,678 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 21 treesize of output 24 [2019-01-18 17:40:27,680 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 24 treesize of output 30 [2019-01-18 17:40:27,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,689 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:40:27,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:40:27,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,708 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 30 treesize of output 72 [2019-01-18 17:40:27,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:40:27,718 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,759 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,781 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,798 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,813 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,825 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:27,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,858 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-18 17:40:27,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,893 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 58 treesize of output 67 [2019-01-18 17:40:27,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:27,967 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 46 treesize of output 72 [2019-01-18 17:40:28,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-18 17:40:28,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,090 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:40:28,091 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,116 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,140 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,165 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,190 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,233 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:28,234 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 17:40:28,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,266 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-18 17:40:28,267 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,308 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:28,309 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:28,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-18 17:40:28,344 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,392 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:28,392 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-18 17:40:28,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:28,434 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:28,435 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2019-01-18 17:40:28,436 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:28,495 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. [2019-01-18 17:40:28,496 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-18 17:40:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:28,519 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:28,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:28,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:40:28,637 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:28,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:40:28,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:40:28,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:40:28,638 INFO L87 Difference]: Start difference. First operand 325 states and 2130 transitions. Second operand 10 states. [2019-01-18 17:40:29,242 WARN L181 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2019-01-18 17:40:29,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:29,683 INFO L93 Difference]: Finished difference Result 368 states and 2210 transitions. [2019-01-18 17:40:29,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:40:29,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 17:40:29,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:29,688 INFO L225 Difference]: With dead ends: 368 [2019-01-18 17:40:29,688 INFO L226 Difference]: Without dead ends: 366 [2019-01-18 17:40:29,688 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:40:29,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2019-01-18 17:40:29,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 329. [2019-01-18 17:40:29,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2019-01-18 17:40:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 2135 transitions. [2019-01-18 17:40:29,755 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 2135 transitions. Word has length 6 [2019-01-18 17:40:29,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:29,755 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 2135 transitions. [2019-01-18 17:40:29,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:40:29,756 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 2135 transitions. [2019-01-18 17:40:29,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:40:29,757 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:29,757 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-18 17:40:29,757 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:29,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:29,757 INFO L82 PathProgramCache]: Analyzing trace with hash 904329640, now seen corresponding path program 3 times [2019-01-18 17:40:29,757 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:29,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:29,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:29,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:29,758 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:40:29,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:29,809 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:29,810 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:40:29,810 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:40:29,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:29,810 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:29,821 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 17:40:29,821 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 17:40:29,828 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 17:40:29,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:40:29,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:29,852 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 21 treesize of output 24 [2019-01-18 17:40:29,855 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:40:29,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,862 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 26 treesize of output 40 [2019-01-18 17:40:29,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:40:29,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,906 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 30 treesize of output 72 [2019-01-18 17:40:29,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:29,960 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:40:29,961 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:29,999 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,020 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,038 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,050 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,063 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,095 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 68 treesize of output 71 [2019-01-18 17:40:30,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,132 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 58 treesize of output 67 [2019-01-18 17:40:30,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,176 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 46 treesize of output 72 [2019-01-18 17:40:30,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,229 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 37 treesize of output 80 [2019-01-18 17:40:30,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:40:30,299 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,324 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,348 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,372 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,397 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,441 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:30,441 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 17:40:30,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,467 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-18 17:40:30,468 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,509 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:30,509 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:30,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,540 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-18 17:40:30,541 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,587 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:30,587 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-18 17:40:30,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,616 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:30,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-18 17:40:30,618 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,667 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:30,667 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-18 17:40:30,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:30,711 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 135 [2019-01-18 17:40:30,712 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:30,766 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. [2019-01-18 17:40:30,766 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:45 [2019-01-18 17:40:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:30,789 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:30,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:30,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-01-18 17:40:30,849 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:30,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-18 17:40:30,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-18 17:40:30,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:40:30,849 INFO L87 Difference]: Start difference. First operand 329 states and 2135 transitions. Second operand 11 states. [2019-01-18 17:40:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:31,599 INFO L93 Difference]: Finished difference Result 407 states and 2353 transitions. [2019-01-18 17:40:31,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 17:40:31,600 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-18 17:40:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:31,604 INFO L225 Difference]: With dead ends: 407 [2019-01-18 17:40:31,604 INFO L226 Difference]: Without dead ends: 401 [2019-01-18 17:40:31,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-01-18 17:40:31,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2019-01-18 17:40:31,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 341. [2019-01-18 17:40:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2019-01-18 17:40:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 2222 transitions. [2019-01-18 17:40:31,681 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 2222 transitions. Word has length 6 [2019-01-18 17:40:31,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:31,681 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 2222 transitions. [2019-01-18 17:40:31,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-18 17:40:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 2222 transitions. [2019-01-18 17:40:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:40:31,682 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:31,682 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:40:31,683 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:31,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:31,683 INFO L82 PathProgramCache]: Analyzing trace with hash 904329206, now seen corresponding path program 1 times [2019-01-18 17:40:31,683 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:31,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:31,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:40:31,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:31,684 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:31,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:31,883 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:31,883 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:40:31,883 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [24], [27] [2019-01-18 17:40:31,885 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:31,885 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:31,887 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:31,887 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 17:40:31,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:31,887 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:31,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:31,887 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:31,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:31,903 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:31,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:31,933 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 21 treesize of output 24 [2019-01-18 17:40:31,935 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 24 treesize of output 30 [2019-01-18 17:40:31,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,990 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 26 treesize of output 40 [2019-01-18 17:40:31,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:31,995 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 28 treesize of output 54 [2019-01-18 17:40:31,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,003 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 30 treesize of output 72 [2019-01-18 17:40:32,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,011 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:40:32,012 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,050 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,071 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,089 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,103 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,115 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,147 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 68 treesize of output 71 [2019-01-18 17:40:32,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,184 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 58 treesize of output 67 [2019-01-18 17:40:32,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,228 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 46 treesize of output 72 [2019-01-18 17:40:32,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,282 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 37 treesize of output 80 [2019-01-18 17:40:32,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:40:32,350 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,375 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,398 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,422 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,447 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,490 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:32,490 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 17:40:32,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,525 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-18 17:40:32,526 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,567 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:32,568 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:32,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-18 17:40:32,604 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,650 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:32,651 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-01-18 17:40:32,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,688 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:32,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-18 17:40:32,691 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,742 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:32,743 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-18 17:40:32,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,777 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:32,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:32,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2019-01-18 17:40:32,780 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:32,837 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. [2019-01-18 17:40:32,838 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-01-18 17:40:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:32,862 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:32,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:32,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-18 17:40:32,933 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:32,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 17:40:32,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 17:40:32,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:40:32,933 INFO L87 Difference]: Start difference. First operand 341 states and 2222 transitions. Second operand 12 states. [2019-01-18 17:40:33,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:33,980 INFO L93 Difference]: Finished difference Result 645 states and 3901 transitions. [2019-01-18 17:40:33,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-01-18 17:40:33,980 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 17:40:33,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:33,986 INFO L225 Difference]: With dead ends: 645 [2019-01-18 17:40:33,986 INFO L226 Difference]: Without dead ends: 643 [2019-01-18 17:40:33,987 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2019-01-18 17:40:33,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2019-01-18 17:40:34,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 463. [2019-01-18 17:40:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2019-01-18 17:40:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 3101 transitions. [2019-01-18 17:40:34,090 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 3101 transitions. Word has length 6 [2019-01-18 17:40:34,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:34,091 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 3101 transitions. [2019-01-18 17:40:34,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 17:40:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 3101 transitions. [2019-01-18 17:40:34,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:40:34,092 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:34,092 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:40:34,092 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:34,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:34,092 INFO L82 PathProgramCache]: Analyzing trace with hash 904333674, now seen corresponding path program 1 times [2019-01-18 17:40:34,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:34,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:34,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:34,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:34,093 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:34,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:34,175 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:34,175 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:40:34,175 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [28], [30], [31] [2019-01-18 17:40:34,176 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:34,176 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:34,178 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:34,178 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:40:34,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:34,178 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:34,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:34,179 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:34,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:34,190 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:34,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:34,204 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 21 treesize of output 24 [2019-01-18 17:40:34,208 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 24 treesize of output 26 [2019-01-18 17:40:34,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,217 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 26 treesize of output 36 [2019-01-18 17:40:34,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,227 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 28 treesize of output 50 [2019-01-18 17:40:34,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,237 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 30 treesize of output 68 [2019-01-18 17:40:34,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:40:34,252 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,279 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,296 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,311 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,324 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,336 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,357 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 43 treesize of output 39 [2019-01-18 17:40:34,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,378 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 36 treesize of output 49 [2019-01-18 17:40:34,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,412 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 32 treesize of output 57 [2019-01-18 17:40:34,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:40:34,456 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,471 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,484 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,499 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,528 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:34,528 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-18 17:40:34,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,568 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2019-01-18 17:40:34,569 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:34,594 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:34,594 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-01-18 17:40:34,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:34,682 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 17:40:34,683 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:40:34,775 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-18 17:40:34,776 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:68 [2019-01-18 17:40:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:34,813 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:34,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:34,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2019-01-18 17:40:34,846 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:34,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-18 17:40:34,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-18 17:40:34,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:34,847 INFO L87 Difference]: Start difference. First operand 463 states and 3101 transitions. Second operand 9 states. [2019-01-18 17:40:35,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:35,374 INFO L93 Difference]: Finished difference Result 527 states and 3325 transitions. [2019-01-18 17:40:35,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:40:35,374 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-18 17:40:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:35,380 INFO L225 Difference]: With dead ends: 527 [2019-01-18 17:40:35,380 INFO L226 Difference]: Without dead ends: 524 [2019-01-18 17:40:35,380 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2019-01-18 17:40:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2019-01-18 17:40:35,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 487. [2019-01-18 17:40:35,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2019-01-18 17:40:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 3268 transitions. [2019-01-18 17:40:35,492 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 3268 transitions. Word has length 6 [2019-01-18 17:40:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:35,493 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 3268 transitions. [2019-01-18 17:40:35,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-18 17:40:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 3268 transitions. [2019-01-18 17:40:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:40:35,493 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:35,494 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:40:35,494 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:35,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:35,494 INFO L82 PathProgramCache]: Analyzing trace with hash 904320156, now seen corresponding path program 1 times [2019-01-18 17:40:35,494 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:35,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:35,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:35,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:35,495 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:40:35,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:35,556 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:35,556 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:40:35,556 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [28], [29] [2019-01-18 17:40:35,557 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:35,557 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:35,559 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:35,559 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:40:35,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:35,560 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:35,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:35,560 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:35,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:35,578 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:35,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:35,653 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 21 treesize of output 24 [2019-01-18 17:40:35,655 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 24 treesize of output 30 [2019-01-18 17:40:35,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,659 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 26 treesize of output 40 [2019-01-18 17:40:35,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,663 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 28 treesize of output 54 [2019-01-18 17:40:35,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,680 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 30 treesize of output 72 [2019-01-18 17:40:35,688 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:40:35,689 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,717 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,738 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,755 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,769 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,781 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,807 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-18 17:40:35,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,839 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 41 treesize of output 53 [2019-01-18 17:40:35,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,876 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 32 treesize of output 61 [2019-01-18 17:40:35,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:35,923 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:40:35,923 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,939 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,952 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,968 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:35,998 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:35,999 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 17:40:36,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,047 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 17:40:36,048 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:36,074 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:36,074 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-18 17:40:36,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,104 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 17:40:36,105 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:36,137 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:36,137 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2019-01-18 17:40:36,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:36,173 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:36,174 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 104 [2019-01-18 17:40:36,174 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:36,210 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:36,210 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2019-01-18 17:40:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:36,233 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:36,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:36,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:40:36,288 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:36,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:40:36,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:40:36,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:40:36,288 INFO L87 Difference]: Start difference. First operand 487 states and 3268 transitions. Second operand 10 states. [2019-01-18 17:40:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:36,880 INFO L93 Difference]: Finished difference Result 534 states and 3436 transitions. [2019-01-18 17:40:36,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:40:36,881 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 17:40:36,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:36,888 INFO L225 Difference]: With dead ends: 534 [2019-01-18 17:40:36,888 INFO L226 Difference]: Without dead ends: 533 [2019-01-18 17:40:36,888 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:40:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2019-01-18 17:40:37,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 505. [2019-01-18 17:40:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2019-01-18 17:40:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 3394 transitions. [2019-01-18 17:40:37,012 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 3394 transitions. Word has length 6 [2019-01-18 17:40:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:37,013 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 3394 transitions. [2019-01-18 17:40:37,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:40:37,013 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 3394 transitions. [2019-01-18 17:40:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:40:37,014 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:37,014 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:40:37,014 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:37,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:37,014 INFO L82 PathProgramCache]: Analyzing trace with hash 904806422, now seen corresponding path program 1 times [2019-01-18 17:40:37,015 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:37,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:37,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:37,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:37,015 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:37,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:37,083 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:37,083 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:40:37,084 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [24], [28], [29] [2019-01-18 17:40:37,084 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:37,084 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:37,087 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:37,087 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:40:37,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:37,087 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:37,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:37,087 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:37,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:37,096 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:37,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:37,104 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 21 treesize of output 24 [2019-01-18 17:40:37,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-18 17:40:37,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,123 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 17:40:37,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,130 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 28 treesize of output 50 [2019-01-18 17:40:37,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,139 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 30 treesize of output 68 [2019-01-18 17:40:37,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,151 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:40:37,151 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,187 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,207 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,223 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,236 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,249 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,275 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 63 treesize of output 56 [2019-01-18 17:40:37,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,293 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 53 treesize of output 63 [2019-01-18 17:40:37,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,332 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 46 treesize of output 68 [2019-01-18 17:40:37,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,383 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 37 treesize of output 76 [2019-01-18 17:40:37,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:40:37,449 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,489 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,512 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,534 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,559 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,600 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:37,600 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-18 17:40:37,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,665 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-01-18 17:40:37,665 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,703 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:37,703 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-01-18 17:40:37,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 101 [2019-01-18 17:40:37,745 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,807 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:37,808 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2019-01-18 17:40:37,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,843 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:37,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:37,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 114 [2019-01-18 17:40:37,845 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:37,889 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. [2019-01-18 17:40:37,889 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:43 [2019-01-18 17:40:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:37,913 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:37,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:37,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:40:37,983 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:37,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:40:37,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:40:37,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:40:37,984 INFO L87 Difference]: Start difference. First operand 505 states and 3394 transitions. Second operand 10 states. [2019-01-18 17:40:38,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:38,564 INFO L93 Difference]: Finished difference Result 543 states and 3439 transitions. [2019-01-18 17:40:38,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:40:38,565 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 17:40:38,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:38,570 INFO L225 Difference]: With dead ends: 543 [2019-01-18 17:40:38,570 INFO L226 Difference]: Without dead ends: 542 [2019-01-18 17:40:38,571 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:40:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2019-01-18 17:40:38,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 500. [2019-01-18 17:40:38,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2019-01-18 17:40:38,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 3359 transitions. [2019-01-18 17:40:38,692 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 3359 transitions. Word has length 6 [2019-01-18 17:40:38,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:38,692 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 3359 transitions. [2019-01-18 17:40:38,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:40:38,692 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 3359 transitions. [2019-01-18 17:40:38,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:40:38,693 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:38,694 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:40:38,694 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:38,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:38,694 INFO L82 PathProgramCache]: Analyzing trace with hash 904796812, now seen corresponding path program 1 times [2019-01-18 17:40:38,694 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:38,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:38,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:38,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:38,695 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:38,850 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-18 17:40:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:39,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:39,066 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:39,066 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:40:39,066 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [28], [29] [2019-01-18 17:40:39,068 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:39,068 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:39,069 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:39,069 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:40:39,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:39,069 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:39,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:39,070 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:39,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:39,078 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:39,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:39,088 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 21 treesize of output 24 [2019-01-18 17:40:39,091 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 24 treesize of output 26 [2019-01-18 17:40:39,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,097 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 26 treesize of output 36 [2019-01-18 17:40:39,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 17:40:39,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,118 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 30 treesize of output 68 [2019-01-18 17:40:39,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,132 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:40:39,133 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,172 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,192 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,208 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,221 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,234 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,259 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 63 treesize of output 56 [2019-01-18 17:40:39,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,277 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 53 treesize of output 63 [2019-01-18 17:40:39,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,318 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 46 treesize of output 68 [2019-01-18 17:40:39,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,369 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 37 treesize of output 76 [2019-01-18 17:40:39,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:40:39,434 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,457 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,479 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,501 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,526 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,567 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:39,568 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-18 17:40:39,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,603 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-01-18 17:40:39,603 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,642 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:39,643 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-01-18 17:40:39,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 101 [2019-01-18 17:40:39,680 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,722 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:39,722 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2019-01-18 17:40:39,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:39,764 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:39,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2019-01-18 17:40:39,765 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:39,810 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. [2019-01-18 17:40:39,810 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:45 [2019-01-18 17:40:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:39,834 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:39,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:39,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:40:39,889 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:39,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:40:39,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:40:39,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:40:39,890 INFO L87 Difference]: Start difference. First operand 500 states and 3359 transitions. Second operand 10 states. [2019-01-18 17:40:40,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:40,551 INFO L93 Difference]: Finished difference Result 537 states and 3427 transitions. [2019-01-18 17:40:40,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:40:40,551 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 17:40:40,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:40,556 INFO L225 Difference]: With dead ends: 537 [2019-01-18 17:40:40,556 INFO L226 Difference]: Without dead ends: 536 [2019-01-18 17:40:40,556 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:40:40,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2019-01-18 17:40:40,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 501. [2019-01-18 17:40:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2019-01-18 17:40:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 3366 transitions. [2019-01-18 17:40:40,672 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 3366 transitions. Word has length 6 [2019-01-18 17:40:40,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:40,672 INFO L480 AbstractCegarLoop]: Abstraction has 501 states and 3366 transitions. [2019-01-18 17:40:40,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:40:40,672 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 3366 transitions. [2019-01-18 17:40:40,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:40:40,673 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:40,673 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:40:40,673 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:40,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:40,673 INFO L82 PathProgramCache]: Analyzing trace with hash 904848706, now seen corresponding path program 1 times [2019-01-18 17:40:40,673 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:40,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:40,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:40,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:40,674 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:41,103 WARN L181 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2019-01-18 17:40:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:40:41,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:41,175 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:41,175 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:40:41,175 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [28], [29] [2019-01-18 17:40:41,176 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:41,176 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:41,178 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:41,178 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:40:41,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:41,179 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:41,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:41,179 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:41,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:41,201 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:41,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:41,259 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 21 treesize of output 24 [2019-01-18 17:40:41,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:40:41,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,267 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 26 treesize of output 40 [2019-01-18 17:40:41,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,272 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 28 treesize of output 54 [2019-01-18 17:40:41,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,279 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 30 treesize of output 72 [2019-01-18 17:40:41,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,287 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:40:41,288 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,327 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,349 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,366 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,450 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,463 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,495 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-18 17:40:41,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,532 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 58 treesize of output 67 [2019-01-18 17:40:41,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,577 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-18 17:40:41,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,631 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 37 treesize of output 80 [2019-01-18 17:40:41,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:40:41,699 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,722 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,746 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,771 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,795 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:41,839 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 17:40:41,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:41,873 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-18 17:40:41,874 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:41,987 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:41,987 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:42,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,019 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:42,020 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-01-18 17:40:42,021 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:42,064 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:42,064 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2019-01-18 17:40:42,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:42,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2019-01-18 17:40:42,100 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:42,144 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. [2019-01-18 17:40:42,145 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2019-01-18 17:40:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:42,167 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:42,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:42,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:40:42,223 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:42,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:40:42,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:40:42,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:40:42,223 INFO L87 Difference]: Start difference. First operand 501 states and 3366 transitions. Second operand 10 states. [2019-01-18 17:40:42,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:42,921 INFO L93 Difference]: Finished difference Result 588 states and 3737 transitions. [2019-01-18 17:40:42,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:40:42,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 17:40:42,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:42,926 INFO L225 Difference]: With dead ends: 588 [2019-01-18 17:40:42,926 INFO L226 Difference]: Without dead ends: 587 [2019-01-18 17:40:42,926 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:40:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2019-01-18 17:40:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 534. [2019-01-18 17:40:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2019-01-18 17:40:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 3605 transitions. [2019-01-18 17:40:43,049 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 3605 transitions. Word has length 6 [2019-01-18 17:40:43,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:43,049 INFO L480 AbstractCegarLoop]: Abstraction has 534 states and 3605 transitions. [2019-01-18 17:40:43,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:40:43,049 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 3605 transitions. [2019-01-18 17:40:43,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:40:43,050 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:43,050 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:40:43,050 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:43,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:43,051 INFO L82 PathProgramCache]: Analyzing trace with hash 904869912, now seen corresponding path program 1 times [2019-01-18 17:40:43,051 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:43,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:43,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:43,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:43,052 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:43,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:43,099 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:43,099 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:40:43,099 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [28], [30], [31] [2019-01-18 17:40:43,101 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:43,101 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:43,103 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:43,103 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:40:43,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:43,104 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:43,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:43,104 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:43,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:43,119 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:43,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:43,129 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 21 treesize of output 24 [2019-01-18 17:40:43,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-18 17:40:43,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,140 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 26 treesize of output 36 [2019-01-18 17:40:43,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,150 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 28 treesize of output 50 [2019-01-18 17:40:43,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 17:40:43,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,183 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:40:43,183 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,225 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,243 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,259 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,272 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,284 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,310 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 63 treesize of output 56 [2019-01-18 17:40:43,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,328 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 53 treesize of output 63 [2019-01-18 17:40:43,473 WARN L181 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2019-01-18 17:40:43,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,481 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 46 treesize of output 68 [2019-01-18 17:40:43,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,532 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 37 treesize of output 76 [2019-01-18 17:40:43,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,597 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:40:43,597 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,620 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,643 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,666 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,691 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,731 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:43,732 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-18 17:40:43,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,760 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-01-18 17:40:43,760 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,797 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:43,797 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-01-18 17:40:43,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:43,823 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:43,824 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 102 [2019-01-18 17:40:43,825 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:43,865 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. [2019-01-18 17:40:43,866 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:79, output treesize:55 [2019-01-18 17:40:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:43,885 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:43,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:43,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:40:43,925 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:43,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:40:43,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:40:43,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:43,926 INFO L87 Difference]: Start difference. First operand 534 states and 3605 transitions. Second operand 8 states. [2019-01-18 17:40:44,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:44,397 INFO L93 Difference]: Finished difference Result 558 states and 3635 transitions. [2019-01-18 17:40:44,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:40:44,398 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-18 17:40:44,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:44,402 INFO L225 Difference]: With dead ends: 558 [2019-01-18 17:40:44,402 INFO L226 Difference]: Without dead ends: 557 [2019-01-18 17:40:44,402 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:40:44,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2019-01-18 17:40:44,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 533. [2019-01-18 17:40:44,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2019-01-18 17:40:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 3598 transitions. [2019-01-18 17:40:44,534 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 3598 transitions. Word has length 6 [2019-01-18 17:40:44,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:44,535 INFO L480 AbstractCegarLoop]: Abstraction has 533 states and 3598 transitions. [2019-01-18 17:40:44,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:40:44,535 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 3598 transitions. [2019-01-18 17:40:44,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:40:44,536 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:44,536 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:40:44,536 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:44,536 INFO L82 PathProgramCache]: Analyzing trace with hash 904431632, now seen corresponding path program 1 times [2019-01-18 17:40:44,536 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:44,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:44,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:44,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:44,537 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:44,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:44,613 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:44,614 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:40:44,614 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [28], [29] [2019-01-18 17:40:44,614 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:44,615 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:44,617 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:44,617 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:40:44,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:44,617 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:44,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:44,618 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:44,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:44,628 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:44,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:44,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,660 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 48 treesize of output 54 [2019-01-18 17:40:44,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,692 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 41 treesize of output 53 [2019-01-18 17:40:44,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,727 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 32 treesize of output 61 [2019-01-18 17:40:44,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:44,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:40:44,774 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,790 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,806 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,822 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:40:44,847 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 30 [2019-01-18 17:40:44,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:40:44,853 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:40:44,856 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 30 treesize of output 72 [2019-01-18 17:40:44,863 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:40:44,863 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,912 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,931 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,946 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,958 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:44,969 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:45,000 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:45,000 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 17:40:45,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,035 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 17:40:45,035 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:45,062 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:45,062 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 17:40:45,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,087 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:45,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2019-01-18 17:40:45,089 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:45,119 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:45,119 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:42 [2019-01-18 17:40:45,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:45,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 90 [2019-01-18 17:40:45,147 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:45,178 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:45,178 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:38 [2019-01-18 17:40:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:45,196 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:45,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:45,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:40:45,237 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:45,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:40:45,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:40:45,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:40:45,237 INFO L87 Difference]: Start difference. First operand 533 states and 3598 transitions. Second operand 10 states. [2019-01-18 17:40:45,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:45,895 INFO L93 Difference]: Finished difference Result 795 states and 5176 transitions. [2019-01-18 17:40:45,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 17:40:45,895 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 17:40:45,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:45,899 INFO L225 Difference]: With dead ends: 795 [2019-01-18 17:40:45,899 INFO L226 Difference]: Without dead ends: 794 [2019-01-18 17:40:45,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:40:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2019-01-18 17:40:46,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 484. [2019-01-18 17:40:46,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2019-01-18 17:40:46,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 3230 transitions. [2019-01-18 17:40:46,043 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 3230 transitions. Word has length 6 [2019-01-18 17:40:46,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:46,043 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 3230 transitions. [2019-01-18 17:40:46,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:40:46,043 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 3230 transitions. [2019-01-18 17:40:46,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:40:46,045 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:46,045 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:40:46,045 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:46,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:46,045 INFO L82 PathProgramCache]: Analyzing trace with hash 904452838, now seen corresponding path program 1 times [2019-01-18 17:40:46,045 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:46,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:46,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:46,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:46,046 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:46,201 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-01-18 17:40:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:46,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:46,240 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:46,240 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:40:46,241 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [28], [30], [31] [2019-01-18 17:40:46,241 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:40:46,242 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:40:46,243 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:40:46,244 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:40:46,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:46,244 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:40:46,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:46,244 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:46,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:46,258 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:46,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:46,266 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 21 treesize of output 24 [2019-01-18 17:40:46,269 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 24 treesize of output 26 [2019-01-18 17:40:46,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,276 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 26 treesize of output 36 [2019-01-18 17:40:46,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,282 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 28 treesize of output 50 [2019-01-18 17:40:46,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,292 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 30 treesize of output 68 [2019-01-18 17:40:46,301 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:40:46,301 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,326 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,346 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,361 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,374 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,386 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,408 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 43 treesize of output 39 [2019-01-18 17:40:46,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,424 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 36 treesize of output 49 [2019-01-18 17:40:46,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2019-01-18 17:40:46,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:40:46,503 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,541 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,554 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,570 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,598 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:46,599 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-18 17:40:46,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,640 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2019-01-18 17:40:46,640 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:46,665 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:46,665 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-01-18 17:40:46,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:46,694 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:46,703 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 81 [2019-01-18 17:40:46,703 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:40:46,790 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-18 17:40:46,791 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:76 [2019-01-18 17:40:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:46,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:46,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:46,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2019-01-18 17:40:46,880 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:46,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-18 17:40:46,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-18 17:40:46,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:40:46,880 INFO L87 Difference]: Start difference. First operand 484 states and 3230 transitions. Second operand 9 states. [2019-01-18 17:40:47,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:47,663 INFO L93 Difference]: Finished difference Result 539 states and 3425 transitions. [2019-01-18 17:40:47,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:40:47,664 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-18 17:40:47,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:47,667 INFO L225 Difference]: With dead ends: 539 [2019-01-18 17:40:47,667 INFO L226 Difference]: Without dead ends: 538 [2019-01-18 17:40:47,667 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2019-01-18 17:40:47,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2019-01-18 17:40:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 500. [2019-01-18 17:40:47,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2019-01-18 17:40:47,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 3342 transitions. [2019-01-18 17:40:47,867 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 3342 transitions. Word has length 6 [2019-01-18 17:40:47,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:47,868 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 3342 transitions. [2019-01-18 17:40:47,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-18 17:40:47,868 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 3342 transitions. [2019-01-18 17:40:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:40:47,869 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:47,869 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-18 17:40:47,869 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:47,869 INFO L82 PathProgramCache]: Analyzing trace with hash 893599114, now seen corresponding path program 4 times [2019-01-18 17:40:47,869 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:47,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:47,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:47,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:47,870 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:40:47,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:47,941 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:47,941 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:40:47,941 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:40:47,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:47,941 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:47,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:47,951 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:40:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:47,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:47,974 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 21 treesize of output 24 [2019-01-18 17:40:47,977 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 24 treesize of output 30 [2019-01-18 17:40:47,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,982 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 26 treesize of output 40 [2019-01-18 17:40:47,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,988 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 28 treesize of output 54 [2019-01-18 17:40:47,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:47,996 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 30 treesize of output 72 [2019-01-18 17:40:48,003 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:40:48,003 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:48,031 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:48,052 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:48,068 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:48,082 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:48,094 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:48,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,122 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 48 treesize of output 54 [2019-01-18 17:40:48,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,154 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 41 treesize of output 53 [2019-01-18 17:40:48,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,192 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 32 treesize of output 61 [2019-01-18 17:40:48,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,284 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:40:48,285 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:48,300 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:48,315 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:48,330 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:48,361 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:48,361 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 17:40:48,578 WARN L181 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-18 17:40:48,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-18 17:40:48,616 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:40:48,719 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2019-01-18 17:40:48,720 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:109 [2019-01-18 17:40:48,935 WARN L181 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2019-01-18 17:40:48,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:48,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 81 [2019-01-18 17:40:48,948 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:49,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 91 [2019-01-18 17:40:49,037 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-01-18 17:40:49,155 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 3 xjuncts. [2019-01-18 17:40:49,155 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:129, output treesize:126 [2019-01-18 17:40:49,368 WARN L181 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2019-01-18 17:40:49,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,397 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 101 [2019-01-18 17:40:49,397 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:49,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 111 [2019-01-18 17:40:49,504 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:49,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-01-18 17:40:49,606 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:49,685 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2019-01-18 17:40:49,685 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:159, output treesize:123 [2019-01-18 17:40:49,889 WARN L181 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2019-01-18 17:40:49,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:49,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 125 [2019-01-18 17:40:49,938 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2019-01-18 17:40:50,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-01-18 17:40:50,256 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:50,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,411 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:50,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:50,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2019-01-18 17:40:50,413 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:50,541 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-01-18 17:40:50,541 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:156, output treesize:238 [2019-01-18 17:40:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:50,668 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:50,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:50,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-01-18 17:40:50,759 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:50,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-18 17:40:50,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-18 17:40:50,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:40:50,760 INFO L87 Difference]: Start difference. First operand 500 states and 3342 transitions. Second operand 11 states. [2019-01-18 17:40:51,090 WARN L181 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2019-01-18 17:40:51,725 WARN L181 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2019-01-18 17:40:52,174 WARN L181 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2019-01-18 17:40:52,693 WARN L181 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2019-01-18 17:40:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:53,508 INFO L93 Difference]: Finished difference Result 678 states and 4253 transitions. [2019-01-18 17:40:53,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 17:40:53,509 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-18 17:40:53,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:53,513 INFO L225 Difference]: With dead ends: 678 [2019-01-18 17:40:53,513 INFO L226 Difference]: Without dead ends: 673 [2019-01-18 17:40:53,513 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2019-01-18 17:40:53,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-01-18 17:40:53,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 555. [2019-01-18 17:40:53,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2019-01-18 17:40:53,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 3727 transitions. [2019-01-18 17:40:53,731 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 3727 transitions. Word has length 6 [2019-01-18 17:40:53,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:53,731 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 3727 transitions. [2019-01-18 17:40:53,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-18 17:40:53,732 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 3727 transitions. [2019-01-18 17:40:53,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:40:53,732 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:53,732 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-18 17:40:53,733 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:53,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:53,733 INFO L82 PathProgramCache]: Analyzing trace with hash 893598680, now seen corresponding path program 2 times [2019-01-18 17:40:53,733 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:53,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:53,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:40:53,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:53,734 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:53,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:40:53,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:53,861 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:53,861 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:40:53,861 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:40:53,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:53,861 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:53,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 17:40:53,869 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 17:40:53,875 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 17:40:53,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:40:53,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:53,899 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 21 treesize of output 24 [2019-01-18 17:40:53,902 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 24 treesize of output 30 [2019-01-18 17:40:53,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,907 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 26 treesize of output 40 [2019-01-18 17:40:53,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,914 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 28 treesize of output 54 [2019-01-18 17:40:53,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,923 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 30 treesize of output 72 [2019-01-18 17:40:53,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:53,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:40:53,944 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:53,984 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:54,006 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:54,024 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:54,037 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:54,050 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:54,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,080 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 68 treesize of output 71 [2019-01-18 17:40:54,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,116 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 58 treesize of output 67 [2019-01-18 17:40:54,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,160 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 46 treesize of output 72 [2019-01-18 17:40:54,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-18 17:40:54,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,284 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:40:54,284 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:54,310 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:54,337 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:54,362 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:54,404 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:54,448 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:54,449 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 17:40:54,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,481 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:40:54,482 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:54,528 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:54,528 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:54,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,557 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-18 17:40:54,558 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:54,604 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:54,604 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-18 17:40:54,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,705 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-18 17:40:54,706 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:54,756 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:54,757 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:55 [2019-01-18 17:40:54,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:54,803 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 135 [2019-01-18 17:40:54,804 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:54,857 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. [2019-01-18 17:40:54,858 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:45 [2019-01-18 17:40:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:54,880 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:54,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:54,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-01-18 17:40:54,945 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:54,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-18 17:40:54,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-18 17:40:54,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:40:54,946 INFO L87 Difference]: Start difference. First operand 555 states and 3727 transitions. Second operand 11 states. [2019-01-18 17:40:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:40:55,757 INFO L93 Difference]: Finished difference Result 704 states and 4501 transitions. [2019-01-18 17:40:55,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 17:40:55,757 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-18 17:40:55,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:40:55,762 INFO L225 Difference]: With dead ends: 704 [2019-01-18 17:40:55,762 INFO L226 Difference]: Without dead ends: 703 [2019-01-18 17:40:55,762 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2019-01-18 17:40:55,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2019-01-18 17:40:55,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 655. [2019-01-18 17:40:55,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2019-01-18 17:40:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 4427 transitions. [2019-01-18 17:40:55,996 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 4427 transitions. Word has length 6 [2019-01-18 17:40:55,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:40:55,997 INFO L480 AbstractCegarLoop]: Abstraction has 655 states and 4427 transitions. [2019-01-18 17:40:55,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-18 17:40:55,997 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 4427 transitions. [2019-01-18 17:40:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:40:55,998 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:40:55,998 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:40:55,998 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:40:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:40:55,998 INFO L82 PathProgramCache]: Analyzing trace with hash 893604446, now seen corresponding path program 2 times [2019-01-18 17:40:55,998 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:40:55,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:55,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:40:55,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:40:55,999 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:40:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:40:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:56,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:56,188 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:40:56,188 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:40:56,188 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:40:56,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:40:56,188 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:40:56,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 17:40:56,198 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 17:40:56,204 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 17:40:56,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:40:56,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:40:56,225 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 21 treesize of output 24 [2019-01-18 17:40:56,228 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 24 treesize of output 30 [2019-01-18 17:40:56,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,231 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 26 treesize of output 40 [2019-01-18 17:40:56,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,238 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 28 treesize of output 54 [2019-01-18 17:40:56,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,246 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 30 treesize of output 72 [2019-01-18 17:40:56,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,255 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:40:56,255 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:56,291 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:56,313 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:56,330 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:56,345 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:56,357 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:56,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,389 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 68 treesize of output 71 [2019-01-18 17:40:56,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,427 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 58 treesize of output 67 [2019-01-18 17:40:56,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,472 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 46 treesize of output 72 [2019-01-18 17:40:56,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,525 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 37 treesize of output 80 [2019-01-18 17:40:56,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,593 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:40:56,594 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:56,619 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:56,659 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:56,683 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:56,708 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:40:56,751 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:56,752 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 17:40:56,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,788 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:40:56,788 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:56,830 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:56,831 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-18 17:40:56,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-18 17:40:56,867 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:56,911 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:56,911 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-18 17:40:56,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,951 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:56,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:56,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-18 17:40:56,953 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:57,002 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:40:57,002 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-18 17:40:57,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,039 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:40:57,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:40:57,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2019-01-18 17:40:57,042 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:40:57,090 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. [2019-01-18 17:40:57,091 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-01-18 17:40:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:57,115 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:40:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:40:57,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:40:57,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-18 17:40:57,183 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:40:57,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 17:40:57,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 17:40:57,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:40:57,184 INFO L87 Difference]: Start difference. First operand 655 states and 4427 transitions. Second operand 12 states. [2019-01-18 17:41:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:00,032 INFO L93 Difference]: Finished difference Result 1218 states and 7896 transitions. [2019-01-18 17:41:00,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-18 17:41:00,032 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 17:41:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:00,040 INFO L225 Difference]: With dead ends: 1218 [2019-01-18 17:41:00,040 INFO L226 Difference]: Without dead ends: 1217 [2019-01-18 17:41:00,040 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2019-01-18 17:41:00,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2019-01-18 17:41:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 738. [2019-01-18 17:41:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2019-01-18 17:41:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 5008 transitions. [2019-01-18 17:41:00,410 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 5008 transitions. Word has length 6 [2019-01-18 17:41:00,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:00,410 INFO L480 AbstractCegarLoop]: Abstraction has 738 states and 5008 transitions. [2019-01-18 17:41:00,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 17:41:00,410 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 5008 transitions. [2019-01-18 17:41:00,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:00,411 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:00,411 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:00,411 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:00,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:00,411 INFO L82 PathProgramCache]: Analyzing trace with hash 893724170, now seen corresponding path program 1 times [2019-01-18 17:41:00,411 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:00,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:00,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:41:00,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:00,412 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:41:00,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:00,566 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:00,566 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:41:00,566 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [24], [28], [29] [2019-01-18 17:41:00,567 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:00,567 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:00,568 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:00,568 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:41:00,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:00,569 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:00,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:00,569 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:00,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:00,587 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:00,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:00,646 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 21 treesize of output 24 [2019-01-18 17:41:00,648 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 24 treesize of output 30 [2019-01-18 17:41:00,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,652 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 26 treesize of output 40 [2019-01-18 17:41:00,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,660 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 28 treesize of output 54 [2019-01-18 17:41:00,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,668 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 30 treesize of output 72 [2019-01-18 17:41:00,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,678 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:41:00,679 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,718 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,740 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,757 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,772 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,784 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:00,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,816 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 68 treesize of output 71 [2019-01-18 17:41:00,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,854 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 58 treesize of output 67 [2019-01-18 17:41:00,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-18 17:41:00,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:00,951 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 37 treesize of output 80 [2019-01-18 17:41:01,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:41:01,021 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:01,046 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:01,069 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:01,094 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:01,119 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:01,162 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:01,163 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 17:41:01,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:41:01,197 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:01,239 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:01,240 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:41:01,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,273 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:01,274 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-01-18 17:41:01,274 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:01,319 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:01,319 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:59 [2019-01-18 17:41:01,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:01,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-18 17:41:01,360 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:01,406 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. [2019-01-18 17:41:01,406 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:69, output treesize:47 [2019-01-18 17:41:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:01,431 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:01,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:01,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:41:01,486 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:01,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:41:01,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:41:01,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:41:01,486 INFO L87 Difference]: Start difference. First operand 738 states and 5008 transitions. Second operand 10 states. [2019-01-18 17:41:02,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:02,280 INFO L93 Difference]: Finished difference Result 814 states and 5311 transitions. [2019-01-18 17:41:02,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:41:02,281 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 17:41:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:02,284 INFO L225 Difference]: With dead ends: 814 [2019-01-18 17:41:02,285 INFO L226 Difference]: Without dead ends: 811 [2019-01-18 17:41:02,285 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:41:02,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2019-01-18 17:41:02,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 775. [2019-01-18 17:41:02,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2019-01-18 17:41:02,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 5267 transitions. [2019-01-18 17:41:02,597 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 5267 transitions. Word has length 6 [2019-01-18 17:41:02,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:02,597 INFO L480 AbstractCegarLoop]: Abstraction has 775 states and 5267 transitions. [2019-01-18 17:41:02,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:41:02,597 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 5267 transitions. [2019-01-18 17:41:02,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:02,598 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:02,598 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:02,598 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:02,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:02,598 INFO L82 PathProgramCache]: Analyzing trace with hash 893714560, now seen corresponding path program 1 times [2019-01-18 17:41:02,599 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:02,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:02,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:02,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:02,599 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:41:02,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:02,675 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:02,676 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:41:02,676 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [22], [28], [29] [2019-01-18 17:41:02,677 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:02,677 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:02,679 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:02,679 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:41:02,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:02,679 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:02,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:02,679 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:02,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:02,695 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:02,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:02,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-18 17:41:02,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,747 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 41 treesize of output 53 [2019-01-18 17:41:02,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,783 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 32 treesize of output 61 [2019-01-18 17:41:02,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:02,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:41:02,831 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,848 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,863 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,879 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,902 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:41:02,905 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 30 [2019-01-18 17:41:02,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:41:02,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:41:02,913 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 30 treesize of output 72 [2019-01-18 17:41:02,922 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:41:02,923 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,947 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,966 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,981 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:02,993 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,004 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,035 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:03,035 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 17:41:03,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:41:03,089 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,116 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:03,116 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-18 17:41:03,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,146 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:03,147 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-18 17:41:03,148 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,175 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:03,175 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:42 [2019-01-18 17:41:03,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:03,206 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:03,207 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-18 17:41:03,207 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:03,237 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:03,237 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:42 [2019-01-18 17:41:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:05,266 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:05,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:05,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2019-01-18 17:41:05,320 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:05,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-18 17:41:05,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-18 17:41:05,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=100, Unknown=1, NotChecked=0, Total=156 [2019-01-18 17:41:05,320 INFO L87 Difference]: Start difference. First operand 775 states and 5267 transitions. Second operand 9 states. [2019-01-18 17:41:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:06,150 INFO L93 Difference]: Finished difference Result 812 states and 5339 transitions. [2019-01-18 17:41:06,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:41:06,150 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-18 17:41:06,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:06,153 INFO L225 Difference]: With dead ends: 812 [2019-01-18 17:41:06,153 INFO L226 Difference]: Without dead ends: 811 [2019-01-18 17:41:06,154 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=85, Invalid=154, Unknown=1, NotChecked=0, Total=240 [2019-01-18 17:41:06,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2019-01-18 17:41:06,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 780. [2019-01-18 17:41:06,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2019-01-18 17:41:06,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 5302 transitions. [2019-01-18 17:41:06,471 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 5302 transitions. Word has length 6 [2019-01-18 17:41:06,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:06,471 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 5302 transitions. [2019-01-18 17:41:06,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-18 17:41:06,471 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 5302 transitions. [2019-01-18 17:41:06,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:06,472 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:06,472 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:06,473 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:06,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:06,473 INFO L82 PathProgramCache]: Analyzing trace with hash 893787660, now seen corresponding path program 1 times [2019-01-18 17:41:06,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:06,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:06,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:06,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:06,473 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:41:06,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:06,552 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:06,552 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:41:06,552 INFO L207 CegarAbsIntRunner]: [0], [6], [24], [28], [30], [31] [2019-01-18 17:41:06,553 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:06,553 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:06,555 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:06,555 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:41:06,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:06,555 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:06,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:06,555 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:06,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:06,563 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:06,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:06,581 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 21 treesize of output 24 [2019-01-18 17:41:06,584 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 24 treesize of output 26 [2019-01-18 17:41:06,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,589 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 26 treesize of output 36 [2019-01-18 17:41:06,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,597 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 17:41:06,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 17:41:06,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,614 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:41:06,615 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,651 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,671 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,687 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,700 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,712 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-18 17:41:06,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,755 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 53 treesize of output 63 [2019-01-18 17:41:06,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-18 17:41:06,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,847 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 37 treesize of output 76 [2019-01-18 17:41:06,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:06,913 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:41:06,913 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,935 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,958 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:06,981 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,006 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,046 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:07,047 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-18 17:41:07,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,084 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:41:07,085 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:41:07,223 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-18 17:41:07,223 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:138 [2019-01-18 17:41:07,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:07,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-01-18 17:41:07,272 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:07,304 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:07,305 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:38 [2019-01-18 17:41:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:07,402 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:07,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:07,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:41:07,437 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:07,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:07,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:07,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:41:07,438 INFO L87 Difference]: Start difference. First operand 780 states and 5302 transitions. Second operand 8 states. [2019-01-18 17:41:08,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:08,092 INFO L93 Difference]: Finished difference Result 843 states and 5575 transitions. [2019-01-18 17:41:08,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:41:08,093 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-18 17:41:08,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:08,095 INFO L225 Difference]: With dead ends: 843 [2019-01-18 17:41:08,095 INFO L226 Difference]: Without dead ends: 842 [2019-01-18 17:41:08,095 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-01-18 17:41:08,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2019-01-18 17:41:08,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 813. [2019-01-18 17:41:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2019-01-18 17:41:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 5533 transitions. [2019-01-18 17:41:08,431 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 5533 transitions. Word has length 6 [2019-01-18 17:41:08,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:08,431 INFO L480 AbstractCegarLoop]: Abstraction has 813 states and 5533 transitions. [2019-01-18 17:41:08,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:08,432 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 5533 transitions. [2019-01-18 17:41:08,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:08,433 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:08,433 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:08,433 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:08,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:08,433 INFO L82 PathProgramCache]: Analyzing trace with hash 893774142, now seen corresponding path program 1 times [2019-01-18 17:41:08,433 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:08,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:08,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:08,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:08,434 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:41:08,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:08,491 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:08,491 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:41:08,492 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [24], [28], [29] [2019-01-18 17:41:08,492 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:08,492 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:08,494 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:08,494 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:41:08,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:08,494 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:08,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:08,494 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:08,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:08,502 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:08,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:08,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,530 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 48 treesize of output 54 [2019-01-18 17:41:08,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,561 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 41 treesize of output 53 [2019-01-18 17:41:08,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,601 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 32 treesize of output 61 [2019-01-18 17:41:08,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:41:08,653 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,673 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,693 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,715 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:41:08,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 30 [2019-01-18 17:41:08,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:41:08,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:41:08,753 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:41:08,760 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:41:08,760 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,786 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,805 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,820 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,833 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,844 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:08,873 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:08,874 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 17:41:08,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:08,982 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-18 17:41:08,983 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:41:09,085 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-18 17:41:09,085 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:106 [2019-01-18 17:41:09,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,241 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 103 [2019-01-18 17:41:09,245 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-01-18 17:41:09,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:09,540 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:09,541 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 88 [2019-01-18 17:41:09,542 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:09,696 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 19 dim-0 vars, and 6 xjuncts. [2019-01-18 17:41:09,697 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:126, output treesize:278 [2019-01-18 17:41:10,301 WARN L181 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 103 [2019-01-18 17:41:10,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,307 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 88 [2019-01-18 17:41:10,308 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,432 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:10,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 100 [2019-01-18 17:41:10,434 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,567 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:10,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,569 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 94 [2019-01-18 17:41:10,569 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:10,689 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:10,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-01-18 17:41:10,691 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:10,787 INFO L267 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 4 dim-1 vars, End of recursive call: 16 dim-0 vars, and 4 xjuncts. [2019-01-18 17:41:10,788 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 20 variables, input treesize:227, output treesize:173 [2019-01-18 17:41:10,928 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 81 [2019-01-18 17:41:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:10,933 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:11,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:11,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:41:11,009 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:11,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:41:11,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:41:11,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:41:11,010 INFO L87 Difference]: Start difference. First operand 813 states and 5533 transitions. Second operand 10 states. [2019-01-18 17:41:11,193 WARN L181 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2019-01-18 17:41:13,449 WARN L181 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2019-01-18 17:41:13,789 WARN L181 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2019-01-18 17:41:14,666 WARN L181 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 87 [2019-01-18 17:41:15,575 WARN L181 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2019-01-18 17:41:15,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:15,856 INFO L93 Difference]: Finished difference Result 896 states and 5824 transitions. [2019-01-18 17:41:15,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 17:41:15,857 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 17:41:15,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:15,861 INFO L225 Difference]: With dead ends: 896 [2019-01-18 17:41:15,861 INFO L226 Difference]: Without dead ends: 895 [2019-01-18 17:41:15,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=119, Invalid=222, Unknown=1, NotChecked=0, Total=342 [2019-01-18 17:41:15,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2019-01-18 17:41:16,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 848. [2019-01-18 17:41:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 848 states. [2019-01-18 17:41:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 5778 transitions. [2019-01-18 17:41:16,194 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 5778 transitions. Word has length 6 [2019-01-18 17:41:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:16,195 INFO L480 AbstractCegarLoop]: Abstraction has 848 states and 5778 transitions. [2019-01-18 17:41:16,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:41:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 5778 transitions. [2019-01-18 17:41:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:16,196 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:16,196 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:16,196 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:16,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:16,196 INFO L82 PathProgramCache]: Analyzing trace with hash 893364756, now seen corresponding path program 1 times [2019-01-18 17:41:16,197 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:16,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:16,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:16,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:16,197 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:16,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:16,255 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:16,255 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:41:16,255 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [22], [28], [29] [2019-01-18 17:41:16,255 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:16,256 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:16,257 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:16,257 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:41:16,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:16,258 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:16,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:16,258 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:16,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:16,269 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:16,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:16,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,292 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 48 treesize of output 54 [2019-01-18 17:41:16,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,322 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 41 treesize of output 53 [2019-01-18 17:41:16,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,358 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 32 treesize of output 61 [2019-01-18 17:41:16,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:41:16,405 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,422 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,435 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,451 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:41:16,476 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 30 [2019-01-18 17:41:16,479 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:41:16,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:41:16,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:41:16,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:41:16,491 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,517 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,536 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,551 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,564 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,575 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,606 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:16,606 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2019-01-18 17:41:16,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,648 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:41:16,648 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,677 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:16,677 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2019-01-18 17:41:16,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-01-18 17:41:16,705 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:16,738 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:16,738 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:38 [2019-01-18 17:41:16,951 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2019-01-18 17:41:16,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:16,964 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:16,965 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-01-18 17:41:16,966 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:17,073 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:17,074 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2019-01-18 17:41:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:17,092 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:17,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:17,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:41:17,140 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:17,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:41:17,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:41:17,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:41:17,141 INFO L87 Difference]: Start difference. First operand 848 states and 5778 transitions. Second operand 10 states. [2019-01-18 17:41:18,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:18,086 INFO L93 Difference]: Finished difference Result 975 states and 6393 transitions. [2019-01-18 17:41:18,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:41:18,087 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 17:41:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:18,091 INFO L225 Difference]: With dead ends: 975 [2019-01-18 17:41:18,091 INFO L226 Difference]: Without dead ends: 973 [2019-01-18 17:41:18,092 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:41:18,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2019-01-18 17:41:18,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 930. [2019-01-18 17:41:18,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2019-01-18 17:41:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 6346 transitions. [2019-01-18 17:41:18,447 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 6346 transitions. Word has length 6 [2019-01-18 17:41:18,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:18,447 INFO L480 AbstractCegarLoop]: Abstraction has 930 states and 6346 transitions. [2019-01-18 17:41:18,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:41:18,448 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 6346 transitions. [2019-01-18 17:41:18,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:18,450 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:18,450 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:18,450 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:18,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:18,450 INFO L82 PathProgramCache]: Analyzing trace with hash 893370586, now seen corresponding path program 1 times [2019-01-18 17:41:18,450 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:18,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:18,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:18,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:18,451 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:41:18,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:18,542 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:18,542 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:41:18,542 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [28], [30], [31] [2019-01-18 17:41:18,543 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:18,543 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:18,545 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:18,545 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:41:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:18,545 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:18,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:18,545 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:18,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:18,561 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:18,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:18,571 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 21 treesize of output 24 [2019-01-18 17:41:18,574 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 24 treesize of output 26 [2019-01-18 17:41:18,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,579 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 26 treesize of output 36 [2019-01-18 17:41:18,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,586 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 28 treesize of output 50 [2019-01-18 17:41:18,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,593 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 30 treesize of output 68 [2019-01-18 17:41:18,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:41:18,628 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,653 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,673 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,688 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,700 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,713 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,735 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 43 treesize of output 39 [2019-01-18 17:41:18,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,751 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 36 treesize of output 49 [2019-01-18 17:41:18,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,786 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 32 treesize of output 57 [2019-01-18 17:41:18,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:41:18,831 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,845 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,859 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,874 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:18,905 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:18,906 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-18 17:41:18,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:18,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:41:18,949 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:41:19,036 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-18 17:41:19,036 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:88 [2019-01-18 17:41:19,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,082 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 86 [2019-01-18 17:41:19,083 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:19,147 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:19,148 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 59 [2019-01-18 17:41:19,148 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:19,190 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 2 xjuncts. [2019-01-18 17:41:19,191 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:108, output treesize:84 [2019-01-18 17:41:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:19,256 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:19,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:19,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:41:19,289 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:19,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:19,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:19,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:41:19,290 INFO L87 Difference]: Start difference. First operand 930 states and 6346 transitions. Second operand 8 states. [2019-01-18 17:41:19,934 WARN L181 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2019-01-18 17:41:20,071 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2019-01-18 17:41:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:20,897 INFO L93 Difference]: Finished difference Result 985 states and 6551 transitions. [2019-01-18 17:41:20,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:41:20,897 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-18 17:41:20,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:20,900 INFO L225 Difference]: With dead ends: 985 [2019-01-18 17:41:20,900 INFO L226 Difference]: Without dead ends: 984 [2019-01-18 17:41:20,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:41:20,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2019-01-18 17:41:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 951. [2019-01-18 17:41:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2019-01-18 17:41:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 6492 transitions. [2019-01-18 17:41:21,279 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 6492 transitions. Word has length 6 [2019-01-18 17:41:21,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:21,279 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 6492 transitions. [2019-01-18 17:41:21,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 6492 transitions. [2019-01-18 17:41:21,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:21,281 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:21,281 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:21,281 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:21,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash 908380782, now seen corresponding path program 1 times [2019-01-18 17:41:21,282 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:21,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:21,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:21,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:21,282 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:21,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:21,394 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:21,394 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:41:21,394 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [24], [27] [2019-01-18 17:41:21,395 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:21,395 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:21,396 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:21,396 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 17:41:21,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:21,397 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:21,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:21,397 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:21,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:21,404 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:21,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:21,566 WARN L181 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-01-18 17:41:21,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,593 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 68 treesize of output 71 [2019-01-18 17:41:21,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,629 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 58 treesize of output 67 [2019-01-18 17:41:21,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-18 17:41:21,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,727 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 37 treesize of output 80 [2019-01-18 17:41:21,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:21,797 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:41:21,798 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:21,824 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:21,849 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:21,875 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:21,901 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:21,936 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 21 treesize of output 24 [2019-01-18 17:41:21,939 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:41:21,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:41:21,945 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:41:21,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:41:21,951 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:41:21,952 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:21,986 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,005 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,021 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,033 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,044 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,087 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:22,088 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-18 17:41:22,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,132 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:41:22,132 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,174 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:22,174 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-18 17:41:22,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-18 17:41:22,218 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,262 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:22,262 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-18 17:41:22,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,304 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:22,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-18 17:41:22,306 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,354 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:22,354 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-18 17:41:22,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,394 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:22,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:22,396 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2019-01-18 17:41:22,396 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:22,445 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. [2019-01-18 17:41:22,445 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-01-18 17:41:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:22,597 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:22,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:22,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-18 17:41:22,674 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:22,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 17:41:22,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 17:41:22,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:41:22,675 INFO L87 Difference]: Start difference. First operand 951 states and 6492 transitions. Second operand 12 states. [2019-01-18 17:41:26,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:26,933 INFO L93 Difference]: Finished difference Result 1024 states and 6701 transitions. [2019-01-18 17:41:26,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:41:26,934 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 17:41:26,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:26,938 INFO L225 Difference]: With dead ends: 1024 [2019-01-18 17:41:26,938 INFO L226 Difference]: Without dead ends: 1023 [2019-01-18 17:41:26,938 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2019-01-18 17:41:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2019-01-18 17:41:27,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 948. [2019-01-18 17:41:27,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 948 states. [2019-01-18 17:41:27,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 6467 transitions. [2019-01-18 17:41:27,309 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 6467 transitions. Word has length 6 [2019-01-18 17:41:27,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:27,309 INFO L480 AbstractCegarLoop]: Abstraction has 948 states and 6467 transitions. [2019-01-18 17:41:27,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 17:41:27,309 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 6467 transitions. [2019-01-18 17:41:27,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:27,310 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:27,310 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:27,311 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:27,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:27,311 INFO L82 PathProgramCache]: Analyzing trace with hash 908380906, now seen corresponding path program 1 times [2019-01-18 17:41:27,311 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:27,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:27,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:27,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:27,311 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:27,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:27,469 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:27,469 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:41:27,469 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [24], [27] [2019-01-18 17:41:27,470 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:27,470 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:27,472 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:27,472 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 17:41:27,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:27,473 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:27,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:27,473 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:27,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:27,481 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:27,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:27,507 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 21 treesize of output 24 [2019-01-18 17:41:27,510 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 24 treesize of output 30 [2019-01-18 17:41:27,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,517 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 26 treesize of output 40 [2019-01-18 17:41:27,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,526 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 28 treesize of output 54 [2019-01-18 17:41:27,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,534 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 30 treesize of output 72 [2019-01-18 17:41:27,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,543 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:41:27,543 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,584 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,606 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,623 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,638 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,650 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,684 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 68 treesize of output 71 [2019-01-18 17:41:27,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,720 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 58 treesize of output 67 [2019-01-18 17:41:27,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,764 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 46 treesize of output 72 [2019-01-18 17:41:27,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-18 17:41:27,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:27,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:41:27,890 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,915 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,939 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,964 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:27,989 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:28,033 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:28,033 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-18 17:41:28,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,076 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:41:28,077 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:28,120 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:28,120 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-18 17:41:28,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-18 17:41:28,166 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:28,213 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:28,214 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-18 17:41:28,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,276 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:28,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-18 17:41:28,279 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:28,327 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:28,327 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-18 17:41:28,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:28,369 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:28,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 125 [2019-01-18 17:41:28,371 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:28,420 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. [2019-01-18 17:41:28,420 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:47 [2019-01-18 17:41:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:28,444 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:28,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:28,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-18 17:41:28,517 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:28,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 17:41:28,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 17:41:28,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:41:28,518 INFO L87 Difference]: Start difference. First operand 948 states and 6467 transitions. Second operand 12 states. [2019-01-18 17:41:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:29,761 INFO L93 Difference]: Finished difference Result 1059 states and 6958 transitions. [2019-01-18 17:41:29,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 17:41:29,762 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 17:41:29,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:29,766 INFO L225 Difference]: With dead ends: 1059 [2019-01-18 17:41:29,766 INFO L226 Difference]: Without dead ends: 1057 [2019-01-18 17:41:29,766 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2019-01-18 17:41:29,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2019-01-18 17:41:30,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 945. [2019-01-18 17:41:30,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 945 states. [2019-01-18 17:41:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 6457 transitions. [2019-01-18 17:41:30,155 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 6457 transitions. Word has length 6 [2019-01-18 17:41:30,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:30,155 INFO L480 AbstractCegarLoop]: Abstraction has 945 states and 6457 transitions. [2019-01-18 17:41:30,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 17:41:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 6457 transitions. [2019-01-18 17:41:30,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:30,156 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:30,156 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:30,157 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:30,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:30,157 INFO L82 PathProgramCache]: Analyzing trace with hash 908367452, now seen corresponding path program 1 times [2019-01-18 17:41:30,157 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:30,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:30,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:30,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:30,157 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:30,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:30,248 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:30,248 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:41:30,248 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [27] [2019-01-18 17:41:30,249 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:30,249 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:30,251 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:30,251 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 17:41:30,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:30,252 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:30,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:30,252 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:30,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:30,264 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:30,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:30,287 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 21 treesize of output 24 [2019-01-18 17:41:30,289 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 24 treesize of output 30 [2019-01-18 17:41:30,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,294 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 26 treesize of output 40 [2019-01-18 17:41:30,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,299 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 28 treesize of output 54 [2019-01-18 17:41:30,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,308 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 30 treesize of output 72 [2019-01-18 17:41:30,315 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:41:30,316 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,343 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,364 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,381 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,394 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,407 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,434 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 48 treesize of output 54 [2019-01-18 17:41:30,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,464 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 41 treesize of output 53 [2019-01-18 17:41:30,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,501 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 32 treesize of output 61 [2019-01-18 17:41:30,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,548 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:41:30,548 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,564 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,579 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,594 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,625 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:30,625 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:72, output treesize:71 [2019-01-18 17:41:30,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,690 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:41:30,690 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,716 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:30,716 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2019-01-18 17:41:30,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:41:30,752 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,780 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:30,780 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:38 [2019-01-18 17:41:30,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,815 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:30,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2019-01-18 17:41:30,818 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,851 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:30,851 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:34 [2019-01-18 17:41:30,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:30,884 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:30,885 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 100 [2019-01-18 17:41:30,886 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:30,918 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:30,919 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:38 [2019-01-18 17:41:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:30,939 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:31,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:31,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-18 17:41:31,014 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:31,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 17:41:31,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 17:41:31,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:41:31,015 INFO L87 Difference]: Start difference. First operand 945 states and 6457 transitions. Second operand 12 states. [2019-01-18 17:41:33,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:33,053 INFO L93 Difference]: Finished difference Result 1044 states and 6871 transitions. [2019-01-18 17:41:33,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:41:33,053 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 17:41:33,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:33,057 INFO L225 Difference]: With dead ends: 1044 [2019-01-18 17:41:33,058 INFO L226 Difference]: Without dead ends: 1042 [2019-01-18 17:41:33,058 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2019-01-18 17:41:33,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2019-01-18 17:41:33,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 982. [2019-01-18 17:41:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2019-01-18 17:41:33,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 6716 transitions. [2019-01-18 17:41:33,464 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 6716 transitions. Word has length 6 [2019-01-18 17:41:33,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:33,464 INFO L480 AbstractCegarLoop]: Abstraction has 982 states and 6716 transitions. [2019-01-18 17:41:33,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 17:41:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 6716 transitions. [2019-01-18 17:41:33,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:33,466 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:33,466 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:33,467 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:33,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:33,467 INFO L82 PathProgramCache]: Analyzing trace with hash 908371606, now seen corresponding path program 2 times [2019-01-18 17:41:33,467 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:33,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:33,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:33,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:33,468 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:33,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:33,579 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:33,579 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:41:33,579 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:41:33,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:33,579 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:33,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 17:41:33,588 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 17:41:33,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 17:41:33,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:41:33,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:33,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,618 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 68 treesize of output 71 [2019-01-18 17:41:33,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,655 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 58 treesize of output 67 [2019-01-18 17:41:33,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,699 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 46 treesize of output 72 [2019-01-18 17:41:33,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,754 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 37 treesize of output 80 [2019-01-18 17:41:33,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:33,823 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:41:33,824 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,850 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,875 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,901 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,927 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:33,962 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 21 treesize of output 24 [2019-01-18 17:41:33,965 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:41:33,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:41:33,970 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:41:33,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:41:33,976 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:41:33,977 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,010 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,029 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,044 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,057 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,068 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,112 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:34,112 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-18 17:41:34,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,156 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:41:34,156 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,198 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:34,198 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-18 17:41:34,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-18 17:41:34,237 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,283 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:34,283 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-18 17:41:34,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,330 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:34,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-18 17:41:34,331 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,379 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:34,380 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2019-01-18 17:41:34,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,420 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:34,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:34,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-18 17:41:34,422 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:34,469 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. [2019-01-18 17:41:34,470 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2019-01-18 17:41:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:34,496 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:34,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:34,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-18 17:41:34,571 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:34,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 17:41:34,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 17:41:34,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:41:34,572 INFO L87 Difference]: Start difference. First operand 982 states and 6716 transitions. Second operand 12 states. [2019-01-18 17:41:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:35,798 INFO L93 Difference]: Finished difference Result 1044 states and 6839 transitions. [2019-01-18 17:41:35,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:41:35,799 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 17:41:35,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:35,803 INFO L225 Difference]: With dead ends: 1044 [2019-01-18 17:41:35,804 INFO L226 Difference]: Without dead ends: 1041 [2019-01-18 17:41:35,804 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2019-01-18 17:41:35,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2019-01-18 17:41:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 980. [2019-01-18 17:41:36,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 980 states. [2019-01-18 17:41:36,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 6702 transitions. [2019-01-18 17:41:36,225 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 6702 transitions. Word has length 6 [2019-01-18 17:41:36,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:36,225 INFO L480 AbstractCegarLoop]: Abstraction has 980 states and 6702 transitions. [2019-01-18 17:41:36,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 17:41:36,225 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 6702 transitions. [2019-01-18 17:41:36,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:36,227 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:36,227 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:36,227 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:36,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:36,227 INFO L82 PathProgramCache]: Analyzing trace with hash 908017958, now seen corresponding path program 1 times [2019-01-18 17:41:36,227 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:36,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:36,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:41:36,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:36,228 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:36,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:36,304 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:36,304 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:41:36,304 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [24], [27] [2019-01-18 17:41:36,305 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:36,305 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:36,307 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:36,307 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 17:41:36,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:36,307 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:36,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:36,307 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:36,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:36,315 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:36,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:36,471 WARN L181 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-01-18 17:41:36,482 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 21 treesize of output 24 [2019-01-18 17:41:36,495 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 24 treesize of output 30 [2019-01-18 17:41:36,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,519 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 26 treesize of output 40 [2019-01-18 17:41:36,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,524 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 28 treesize of output 54 [2019-01-18 17:41:36,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,532 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 30 treesize of output 72 [2019-01-18 17:41:36,540 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:41:36,540 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,567 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,587 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,604 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,618 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,630 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,659 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 48 treesize of output 54 [2019-01-18 17:41:36,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,688 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 41 treesize of output 53 [2019-01-18 17:41:36,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2019-01-18 17:41:36,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:41:36,774 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,808 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,823 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,838 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:36,870 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:36,870 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 17:41:36,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:36,972 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-18 17:41:36,973 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:41:37,076 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-18 17:41:37,077 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:106 [2019-01-18 17:41:37,193 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2019-01-18 17:41:37,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,208 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:37,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 93 [2019-01-18 17:41:37,217 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:41:37,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,366 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:37,366 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 80 [2019-01-18 17:41:37,367 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:37,449 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 3 xjuncts. [2019-01-18 17:41:37,450 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:126, output treesize:135 [2019-01-18 17:41:37,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,587 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 95 [2019-01-18 17:41:37,588 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:41:37,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 93 [2019-01-18 17:41:37,765 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:37,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:37,887 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 86 [2019-01-18 17:41:37,888 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:37,980 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 14 dim-0 vars, and 4 xjuncts. [2019-01-18 17:41:37,981 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:165, output treesize:147 [2019-01-18 17:41:38,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 102 [2019-01-18 17:41:38,125 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:38,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,263 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:38,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,279 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 0 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 118 [2019-01-18 17:41:38,280 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2019-01-18 17:41:38,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,546 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:38,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 92 [2019-01-18 17:41:38,548 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:38,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:38,709 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:38,710 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 98 [2019-01-18 17:41:38,711 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:38,845 INFO L267 ElimStorePlain]: Start of recursive call 1: 17 dim-0 vars, 4 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-01-18 17:41:38,845 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 21 variables, input treesize:190, output treesize:230 [2019-01-18 17:41:39,056 WARN L181 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 103 [2019-01-18 17:41:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:39,059 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:39,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:39,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-18 17:41:39,202 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:39,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 17:41:39,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 17:41:39,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:41:39,202 INFO L87 Difference]: Start difference. First operand 980 states and 6702 transitions. Second operand 12 states. [2019-01-18 17:41:39,393 WARN L181 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2019-01-18 17:41:39,656 WARN L181 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2019-01-18 17:41:40,061 WARN L181 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2019-01-18 17:41:40,493 WARN L181 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2019-01-18 17:41:40,966 WARN L181 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 85 [2019-01-18 17:41:41,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:41,820 INFO L93 Difference]: Finished difference Result 1104 states and 7131 transitions. [2019-01-18 17:41:41,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 17:41:41,820 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 17:41:41,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:41,824 INFO L225 Difference]: With dead ends: 1104 [2019-01-18 17:41:41,824 INFO L226 Difference]: Without dead ends: 1102 [2019-01-18 17:41:41,825 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2019-01-18 17:41:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2019-01-18 17:41:42,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 984. [2019-01-18 17:41:42,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2019-01-18 17:41:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 6730 transitions. [2019-01-18 17:41:42,226 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 6730 transitions. Word has length 6 [2019-01-18 17:41:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:42,226 INFO L480 AbstractCegarLoop]: Abstraction has 984 states and 6730 transitions. [2019-01-18 17:41:42,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 17:41:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 6730 transitions. [2019-01-18 17:41:42,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:42,227 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:42,228 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:42,228 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:42,228 INFO L82 PathProgramCache]: Analyzing trace with hash 908017524, now seen corresponding path program 1 times [2019-01-18 17:41:42,228 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:42,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:42,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:42,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:42,229 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:42,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:42,357 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:42,357 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:41:42,357 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [22], [27] [2019-01-18 17:41:42,357 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:42,358 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:42,359 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:42,359 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 17:41:42,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:42,359 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:42,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:42,359 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:42,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:42,376 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:42,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:42,562 WARN L181 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-01-18 17:41:42,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-18 17:41:42,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,612 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 41 treesize of output 53 [2019-01-18 17:41:42,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,651 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 32 treesize of output 61 [2019-01-18 17:41:42,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:41:42,700 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:42,719 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:42,739 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:42,760 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:42,788 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:41:42,790 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 30 [2019-01-18 17:41:42,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:41:42,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:41:42,798 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 30 treesize of output 72 [2019-01-18 17:41:42,806 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:41:42,807 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:42,832 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:42,851 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:42,866 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:42,877 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:42,889 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:42,919 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:42,920 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 17:41:42,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:42,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:41:42,975 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:43,002 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:43,002 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-18 17:41:43,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,071 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:43,072 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-18 17:41:43,072 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:43,101 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:43,101 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:42 [2019-01-18 17:41:43,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:41:43,134 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:43,164 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:43,164 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:34 [2019-01-18 17:41:43,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,198 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:43,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:43,199 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 93 [2019-01-18 17:41:43,200 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:43,233 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:43,233 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:34 [2019-01-18 17:41:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:43,255 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:43,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:43,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-18 17:41:43,316 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:43,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 17:41:43,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 17:41:43,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:41:43,316 INFO L87 Difference]: Start difference. First operand 984 states and 6730 transitions. Second operand 12 states. [2019-01-18 17:41:45,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:45,644 INFO L93 Difference]: Finished difference Result 1313 states and 8698 transitions. [2019-01-18 17:41:45,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-18 17:41:45,644 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 17:41:45,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:45,649 INFO L225 Difference]: With dead ends: 1313 [2019-01-18 17:41:45,649 INFO L226 Difference]: Without dead ends: 1312 [2019-01-18 17:41:45,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2019-01-18 17:41:45,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2019-01-18 17:41:46,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 839. [2019-01-18 17:41:46,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 839 states. [2019-01-18 17:41:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 5721 transitions. [2019-01-18 17:41:46,082 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 5721 transitions. Word has length 6 [2019-01-18 17:41:46,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:46,082 INFO L480 AbstractCegarLoop]: Abstraction has 839 states and 5721 transitions. [2019-01-18 17:41:46,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 17:41:46,082 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 5721 transitions. [2019-01-18 17:41:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:46,083 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:46,083 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:46,083 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:46,084 INFO L82 PathProgramCache]: Analyzing trace with hash 908550478, now seen corresponding path program 1 times [2019-01-18 17:41:46,084 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:46,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:46,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:46,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:46,085 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:46,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:46,139 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:46,139 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:41:46,139 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [24], [28], [29] [2019-01-18 17:41:46,140 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:46,140 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:46,141 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:46,141 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:41:46,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:46,142 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:46,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:46,142 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:46,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:46,150 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:46,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:46,158 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 21 treesize of output 24 [2019-01-18 17:41:46,162 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 24 treesize of output 26 [2019-01-18 17:41:46,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,169 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 26 treesize of output 36 [2019-01-18 17:41:46,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,177 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 28 treesize of output 50 [2019-01-18 17:41:46,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,185 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 30 treesize of output 68 [2019-01-18 17:41:46,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:46,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:41:46,197 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:46,685 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:46,974 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:47,186 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:47,325 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:47,482 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:47,751 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 63 treesize of output 56 [2019-01-18 17:41:47,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-18 17:41:47,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,827 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 46 treesize of output 68 [2019-01-18 17:41:47,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,878 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 37 treesize of output 76 [2019-01-18 17:41:47,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:47,945 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:41:47,945 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:47,969 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:47,991 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,014 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,039 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,080 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:48,081 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-18 17:41:48,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,112 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-18 17:41:48,113 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,152 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:48,152 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-01-18 17:41:48,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 107 [2019-01-18 17:41:48,189 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,232 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:48,233 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:51 [2019-01-18 17:41:48,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:48,326 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:48,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2019-01-18 17:41:48,327 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:48,373 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. [2019-01-18 17:41:48,373 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:45 [2019-01-18 17:41:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:48,396 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:48,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:48,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:41:48,453 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:48,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:41:48,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:41:48,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:41:48,454 INFO L87 Difference]: Start difference. First operand 839 states and 5721 transitions. Second operand 10 states. [2019-01-18 17:41:49,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:49,352 INFO L93 Difference]: Finished difference Result 881 states and 5780 transitions. [2019-01-18 17:41:49,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:41:49,352 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 17:41:49,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:49,355 INFO L225 Difference]: With dead ends: 881 [2019-01-18 17:41:49,355 INFO L226 Difference]: Without dead ends: 880 [2019-01-18 17:41:49,355 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:41:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2019-01-18 17:41:49,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 841. [2019-01-18 17:41:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 841 states. [2019-01-18 17:41:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 5735 transitions. [2019-01-18 17:41:49,788 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 5735 transitions. Word has length 6 [2019-01-18 17:41:49,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:49,788 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 5735 transitions. [2019-01-18 17:41:49,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:41:49,788 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 5735 transitions. [2019-01-18 17:41:49,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:49,789 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:49,789 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:49,789 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:49,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:49,790 INFO L82 PathProgramCache]: Analyzing trace with hash 908133404, now seen corresponding path program 1 times [2019-01-18 17:41:49,790 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:49,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:49,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:49,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:49,790 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:49,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:50,133 WARN L181 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2019-01-18 17:41:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:50,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:50,157 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:50,158 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:41:50,158 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [22], [28], [29] [2019-01-18 17:41:50,158 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:50,159 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:50,160 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:50,160 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:41:50,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:50,162 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:50,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:50,162 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:50,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:50,171 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:50,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:50,184 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 21 treesize of output 24 [2019-01-18 17:41:50,188 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 24 treesize of output 26 [2019-01-18 17:41:50,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,193 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 26 treesize of output 36 [2019-01-18 17:41:50,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,200 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 28 treesize of output 50 [2019-01-18 17:41:50,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 17:41:50,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:41:50,216 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:50,243 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:50,261 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:50,277 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:50,289 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:50,301 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:50,324 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 43 treesize of output 39 [2019-01-18 17:41:50,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,340 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 36 treesize of output 49 [2019-01-18 17:41:50,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,373 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 32 treesize of output 57 [2019-01-18 17:41:50,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:41:50,417 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:50,431 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:50,445 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:50,460 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:50,489 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:50,489 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-18 17:41:50,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,528 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2019-01-18 17:41:50,529 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:50,553 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:50,554 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2019-01-18 17:41:50,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 86 [2019-01-18 17:41:50,589 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:41:50,682 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-18 17:41:50,682 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:72 [2019-01-18 17:41:50,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:50,726 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:50,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 77 [2019-01-18 17:41:50,727 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:50,749 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:50,749 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:27 [2019-01-18 17:41:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:50,764 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:50,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:50,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:41:50,807 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:50,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:41:50,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:41:50,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:41:50,808 INFO L87 Difference]: Start difference. First operand 841 states and 5735 transitions. Second operand 10 states. [2019-01-18 17:41:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:51,990 INFO L93 Difference]: Finished difference Result 1415 states and 9444 transitions. [2019-01-18 17:41:51,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 17:41:51,991 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 17:41:51,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:51,995 INFO L225 Difference]: With dead ends: 1415 [2019-01-18 17:41:51,995 INFO L226 Difference]: Without dead ends: 1413 [2019-01-18 17:41:51,996 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:41:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2019-01-18 17:41:52,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1280. [2019-01-18 17:41:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1280 states. [2019-01-18 17:41:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 8838 transitions. [2019-01-18 17:41:52,692 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 8838 transitions. Word has length 6 [2019-01-18 17:41:52,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:52,692 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 8838 transitions. [2019-01-18 17:41:52,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:41:52,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 8838 transitions. [2019-01-18 17:41:52,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:52,695 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:52,695 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:52,695 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:52,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:52,695 INFO L82 PathProgramCache]: Analyzing trace with hash 909988134, now seen corresponding path program 1 times [2019-01-18 17:41:52,695 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:52,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:52,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:52,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:52,696 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:52,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:52,772 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:52,772 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:41:52,772 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [24], [28], [29] [2019-01-18 17:41:52,773 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:52,773 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:52,774 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:52,774 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:41:52,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:52,775 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:52,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:52,775 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:52,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:52,783 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:52,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:52,792 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 43 treesize of output 39 [2019-01-18 17:41:52,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:52,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:52,807 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 36 treesize of output 49 [2019-01-18 17:41:52,910 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2019-01-18 17:41:52,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:52,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:52,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:52,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:52,919 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 32 treesize of output 57 [2019-01-18 17:41:52,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:52,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:52,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:52,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:52,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:52,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:52,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:41:52,963 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:52,978 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:52,991 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:53,007 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:53,029 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:41:53,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 26 [2019-01-18 17:41:53,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 17:41:53,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 17:41:53,057 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 30 treesize of output 68 [2019-01-18 17:41:53,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:41:53,065 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:53,087 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:53,105 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:53,119 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:53,130 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:53,141 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:53,169 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:53,170 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-18 17:41:53,361 WARN L181 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-01-18 17:41:53,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 87 [2019-01-18 17:41:53,419 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2019-01-18 17:41:53,747 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 21 dim-0 vars, and 7 xjuncts. [2019-01-18 17:41:53,747 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:425 [2019-01-18 17:41:53,899 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 90 [2019-01-18 17:41:53,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:53,907 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 69 [2019-01-18 17:41:53,907 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,007 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:54,016 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 87 [2019-01-18 17:41:54,017 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-01-18 17:41:54,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,156 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:54,164 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 93 [2019-01-18 17:41:54,165 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2019-01-18 17:41:54,321 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 3 dim-1 vars, End of recursive call: 12 dim-0 vars, and 5 xjuncts. [2019-01-18 17:41:54,322 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 11 variables, input treesize:194, output treesize:184 [2019-01-18 17:41:54,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,438 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 75 [2019-01-18 17:41:54,439 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,510 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 69 [2019-01-18 17:41:54,510 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:54,565 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:54,566 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 57 [2019-01-18 17:41:54,566 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:54,610 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 3 xjuncts. [2019-01-18 17:41:54,611 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:132, output treesize:92 [2019-01-18 17:41:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:54,668 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:54,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:54,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:41:54,757 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:54,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:41:54,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:41:54,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:41:54,757 INFO L87 Difference]: Start difference. First operand 1280 states and 8838 transitions. Second operand 10 states. [2019-01-18 17:41:55,141 WARN L181 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2019-01-18 17:41:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:56,568 INFO L93 Difference]: Finished difference Result 1381 states and 9127 transitions. [2019-01-18 17:41:56,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 17:41:56,569 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 17:41:56,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:56,574 INFO L225 Difference]: With dead ends: 1381 [2019-01-18 17:41:56,574 INFO L226 Difference]: Without dead ends: 1379 [2019-01-18 17:41:56,575 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-01-18 17:41:56,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2019-01-18 17:41:57,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1274. [2019-01-18 17:41:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2019-01-18 17:41:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 8796 transitions. [2019-01-18 17:41:57,254 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 8796 transitions. Word has length 6 [2019-01-18 17:41:57,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:57,255 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 8796 transitions. [2019-01-18 17:41:57,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:41:57,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 8796 transitions. [2019-01-18 17:41:57,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:57,257 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:57,257 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:57,257 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:57,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:57,257 INFO L82 PathProgramCache]: Analyzing trace with hash 909993964, now seen corresponding path program 1 times [2019-01-18 17:41:57,257 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:57,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:57,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:57,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:57,258 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:41:57,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:57,303 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:41:57,303 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:41:57,303 INFO L207 CegarAbsIntRunner]: [0], [10], [24], [28], [30], [31] [2019-01-18 17:41:57,304 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:41:57,304 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:41:57,305 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:41:57,305 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:41:57,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:57,306 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:41:57,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:41:57,306 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:41:57,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:57,320 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:41:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:41:57,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:41:57,329 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 63 treesize of output 56 [2019-01-18 17:41:57,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-18 17:41:57,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,390 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 46 treesize of output 68 [2019-01-18 17:41:57,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,462 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 37 treesize of output 76 [2019-01-18 17:41:57,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,526 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:41:57,526 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:57,556 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:57,580 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:57,604 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:57,630 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:57,663 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:41:57,687 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-18 17:41:57,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 17:41:57,695 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 17:41:57,698 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 17:41:57,702 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:41:57,702 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:57,733 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:57,750 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:57,764 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:57,775 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:57,786 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:41:57,827 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:57,827 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-18 17:41:57,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,852 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-18 17:41:57,853 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:41:57,894 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:41:57,894 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-01-18 17:41:57,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:41:57,927 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:41:57,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 112 [2019-01-18 17:41:57,937 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:41:58,075 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2019-01-18 17:41:58,076 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:79, output treesize:110 [2019-01-18 17:41:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:58,127 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:41:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:41:58,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:41:58,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:41:58,167 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:41:58,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:41:58,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:41:58,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:41:58,167 INFO L87 Difference]: Start difference. First operand 1274 states and 8796 transitions. Second operand 8 states. [2019-01-18 17:41:59,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:41:59,254 INFO L93 Difference]: Finished difference Result 1306 states and 8833 transitions. [2019-01-18 17:41:59,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:41:59,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-18 17:41:59,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:41:59,259 INFO L225 Difference]: With dead ends: 1306 [2019-01-18 17:41:59,259 INFO L226 Difference]: Without dead ends: 1305 [2019-01-18 17:41:59,259 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:41:59,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2019-01-18 17:41:59,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1274. [2019-01-18 17:41:59,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2019-01-18 17:41:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 8796 transitions. [2019-01-18 17:41:59,958 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 8796 transitions. Word has length 6 [2019-01-18 17:41:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:41:59,958 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 8796 transitions. [2019-01-18 17:41:59,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:41:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 8796 transitions. [2019-01-18 17:41:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:41:59,960 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:41:59,960 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:41:59,960 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:41:59,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:41:59,961 INFO L82 PathProgramCache]: Analyzing trace with hash 909980134, now seen corresponding path program 1 times [2019-01-18 17:41:59,961 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:41:59,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:59,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:41:59,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:41:59,961 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:41:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:00,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:00,132 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:42:00,132 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:42:00,133 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [24], [27] [2019-01-18 17:42:00,133 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:42:00,134 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:42:00,137 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:42:00,137 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 17:42:00,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:00,137 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:42:00,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:00,137 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:42:00,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:00,148 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:42:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:00,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:42:00,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,174 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 68 treesize of output 71 [2019-01-18 17:42:00,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-18 17:42:00,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,253 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 46 treesize of output 72 [2019-01-18 17:42:00,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,310 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 37 treesize of output 80 [2019-01-18 17:42:00,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:42:00,376 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:00,402 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:00,428 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:00,453 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:00,479 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:00,513 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 21 treesize of output 24 [2019-01-18 17:42:00,516 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:42:00,533 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:42:00,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:42:00,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:42:00,544 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:42:00,545 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:00,577 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:00,596 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:00,611 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:00,624 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:00,635 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:00,678 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:00,678 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-18 17:42:00,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,721 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:42:00,722 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:00,764 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:00,764 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-18 17:42:00,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,804 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:42:00,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2019-01-18 17:42:00,806 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:00,851 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:00,852 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:59 [2019-01-18 17:42:00,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2019-01-18 17:42:00,894 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:00,940 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:00,940 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:73, output treesize:51 [2019-01-18 17:42:00,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:00,983 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:42:00,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 120 [2019-01-18 17:42:00,984 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:01,030 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. [2019-01-18 17:42:01,030 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-01-18 17:42:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:01,060 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:42:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:01,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:42:01,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-18 17:42:01,136 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:42:01,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 17:42:01,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 17:42:01,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:42:01,136 INFO L87 Difference]: Start difference. First operand 1274 states and 8796 transitions. Second operand 12 states. [2019-01-18 17:42:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:42:02,651 INFO L93 Difference]: Finished difference Result 1360 states and 9097 transitions. [2019-01-18 17:42:02,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:42:02,652 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 17:42:02,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:42:02,657 INFO L225 Difference]: With dead ends: 1360 [2019-01-18 17:42:02,657 INFO L226 Difference]: Without dead ends: 1358 [2019-01-18 17:42:02,658 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2019-01-18 17:42:02,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2019-01-18 17:42:03,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1309. [2019-01-18 17:42:03,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2019-01-18 17:42:03,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 9030 transitions. [2019-01-18 17:42:03,348 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 9030 transitions. Word has length 6 [2019-01-18 17:42:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:42:03,348 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 9030 transitions. [2019-01-18 17:42:03,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 17:42:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 9030 transitions. [2019-01-18 17:42:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:42:03,350 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:42:03,350 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:42:03,350 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:42:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash 896939676, now seen corresponding path program 2 times [2019-01-18 17:42:03,351 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:42:03,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:03,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:03,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:03,351 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:42:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:42:03,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:03,477 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:42:03,477 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:42:03,477 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:42:03,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:03,478 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:42:03,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 17:42:03,487 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 17:42:03,494 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 17:42:03,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:42:03,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:42:03,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,518 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 68 treesize of output 71 [2019-01-18 17:42:03,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,582 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 58 treesize of output 67 [2019-01-18 17:42:03,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,626 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 46 treesize of output 72 [2019-01-18 17:42:03,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,681 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 37 treesize of output 80 [2019-01-18 17:42:03,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:03,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:42:03,747 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:03,773 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:03,798 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:03,824 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:03,850 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:03,883 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 21 treesize of output 24 [2019-01-18 17:42:03,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:42:03,888 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:42:03,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:42:03,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:42:03,897 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:42:03,897 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:03,932 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:03,952 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:03,967 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:03,980 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:03,991 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:04,035 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:04,035 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2019-01-18 17:42:04,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,064 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:42:04,065 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:04,110 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:04,110 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:42:04,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-18 17:42:04,139 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:04,186 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:04,186 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-18 17:42:04,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:04,221 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:42:04,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-18 17:42:04,223 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:04,270 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. [2019-01-18 17:42:04,270 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-18 17:42:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:04,293 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:42:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:04,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:42:04,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:42:04,341 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:42:04,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:42:04,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:42:04,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:42:04,341 INFO L87 Difference]: Start difference. First operand 1309 states and 9030 transitions. Second operand 10 states. [2019-01-18 17:42:06,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:42:06,048 INFO L93 Difference]: Finished difference Result 1898 states and 12744 transitions. [2019-01-18 17:42:06,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 17:42:06,049 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 17:42:06,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:42:06,079 INFO L225 Difference]: With dead ends: 1898 [2019-01-18 17:42:06,080 INFO L226 Difference]: Without dead ends: 1896 [2019-01-18 17:42:06,080 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-01-18 17:42:06,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2019-01-18 17:42:07,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1669. [2019-01-18 17:42:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1669 states. [2019-01-18 17:42:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 11590 transitions. [2019-01-18 17:42:07,067 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 11590 transitions. Word has length 6 [2019-01-18 17:42:07,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:42:07,067 INFO L480 AbstractCegarLoop]: Abstraction has 1669 states and 11590 transitions. [2019-01-18 17:42:07,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:42:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 11590 transitions. [2019-01-18 17:42:07,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:42:07,072 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:42:07,072 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:42:07,072 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:42:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:07,072 INFO L82 PathProgramCache]: Analyzing trace with hash 897602894, now seen corresponding path program 1 times [2019-01-18 17:42:07,072 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:42:07,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:07,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:42:07,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:07,073 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:42:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:42:07,155 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 17:42:07,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-01-18 17:42:07,155 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:42:07,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-01-18 17:42:07,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-01-18 17:42:07,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-01-18 17:42:07,155 INFO L87 Difference]: Start difference. First operand 1669 states and 11590 transitions. Second operand 5 states. [2019-01-18 17:42:08,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:42:08,214 INFO L93 Difference]: Finished difference Result 1693 states and 11616 transitions. [2019-01-18 17:42:08,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 17:42:08,214 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-01-18 17:42:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:42:08,219 INFO L225 Difference]: With dead ends: 1693 [2019-01-18 17:42:08,219 INFO L226 Difference]: Without dead ends: 1692 [2019-01-18 17:42:08,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-01-18 17:42:08,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2019-01-18 17:42:09,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1672. [2019-01-18 17:42:09,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2019-01-18 17:42:09,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 11593 transitions. [2019-01-18 17:42:09,252 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 11593 transitions. Word has length 6 [2019-01-18 17:42:09,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:42:09,252 INFO L480 AbstractCegarLoop]: Abstraction has 1672 states and 11593 transitions. [2019-01-18 17:42:09,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-01-18 17:42:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 11593 transitions. [2019-01-18 17:42:09,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:42:09,255 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:42:09,255 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:42:09,255 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:42:09,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:09,255 INFO L82 PathProgramCache]: Analyzing trace with hash 900997082, now seen corresponding path program 1 times [2019-01-18 17:42:09,255 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:42:09,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:09,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:09,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:09,256 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:42:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:09,411 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2019-01-18 17:42:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:09,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:09,422 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:42:09,422 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:42:09,422 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [28], [30], [31] [2019-01-18 17:42:09,423 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:42:09,423 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:42:09,424 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:42:09,424 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:42:09,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:09,424 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:42:09,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:09,424 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:42:09,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:09,434 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:42:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:09,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:42:09,442 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 21 treesize of output 24 [2019-01-18 17:42:09,445 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 24 treesize of output 26 [2019-01-18 17:42:09,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,452 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 26 treesize of output 36 [2019-01-18 17:42:09,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,459 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 28 treesize of output 50 [2019-01-18 17:42:09,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,469 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 30 treesize of output 68 [2019-01-18 17:42:09,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,478 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:42:09,479 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:09,517 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:09,537 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:09,554 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:09,567 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:09,580 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:09,605 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 63 treesize of output 56 [2019-01-18 17:42:09,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,627 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 53 treesize of output 63 [2019-01-18 17:42:09,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,668 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 46 treesize of output 68 [2019-01-18 17:42:09,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,720 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 37 treesize of output 76 [2019-01-18 17:42:09,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:42:09,785 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:09,808 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:09,831 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:09,854 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:09,879 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:09,921 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. [2019-01-18 17:42:09,921 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:84, output treesize:87 [2019-01-18 17:42:09,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:09,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-18 17:42:09,942 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:09,983 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:09,983 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-01-18 17:42:10,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:10,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:10,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:10,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:10,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:10,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:10,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:10,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:10,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 99 [2019-01-18 17:42:10,014 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:10,056 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. [2019-01-18 17:42:10,056 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:77, output treesize:51 [2019-01-18 17:42:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:10,076 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:42:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:10,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:42:10,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:42:10,110 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:42:10,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:42:10,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:42:10,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:42:10,110 INFO L87 Difference]: Start difference. First operand 1672 states and 11593 transitions. Second operand 8 states. [2019-01-18 17:42:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:42:12,136 INFO L93 Difference]: Finished difference Result 2759 states and 18997 transitions. [2019-01-18 17:42:12,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:42:12,136 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-18 17:42:12,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:42:12,144 INFO L225 Difference]: With dead ends: 2759 [2019-01-18 17:42:12,144 INFO L226 Difference]: Without dead ends: 2757 [2019-01-18 17:42:12,145 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:42:12,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2019-01-18 17:42:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2639. [2019-01-18 17:42:13,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2639 states. [2019-01-18 17:42:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 18434 transitions. [2019-01-18 17:42:13,869 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 18434 transitions. Word has length 6 [2019-01-18 17:42:13,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:42:13,869 INFO L480 AbstractCegarLoop]: Abstraction has 2639 states and 18434 transitions. [2019-01-18 17:42:13,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:42:13,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 18434 transitions. [2019-01-18 17:42:13,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:42:13,873 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:42:13,873 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:42:13,873 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:42:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:13,874 INFO L82 PathProgramCache]: Analyzing trace with hash 900629790, now seen corresponding path program 1 times [2019-01-18 17:42:13,874 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:42:13,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:13,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:13,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:13,875 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:42:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:14,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:14,007 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:42:14,007 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-18 17:42:14,008 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [24], [27] [2019-01-18 17:42:14,008 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:42:14,009 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:42:14,010 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:42:14,010 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 17:42:14,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:14,011 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:42:14,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:14,011 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:42:14,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:14,019 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:42:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:14,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:42:14,057 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 21 treesize of output 24 [2019-01-18 17:42:14,059 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 24 treesize of output 30 [2019-01-18 17:42:14,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,064 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 26 treesize of output 40 [2019-01-18 17:42:14,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,071 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 28 treesize of output 54 [2019-01-18 17:42:14,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:42:14,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:42:14,089 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:14,128 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:14,150 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:14,171 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:14,184 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:14,197 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:14,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,229 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 68 treesize of output 71 [2019-01-18 17:42:14,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,266 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 58 treesize of output 67 [2019-01-18 17:42:14,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,316 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 46 treesize of output 72 [2019-01-18 17:42:14,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,368 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 37 treesize of output 80 [2019-01-18 17:42:14,743 WARN L181 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2019-01-18 17:42:14,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,752 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:42:14,753 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:14,776 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:14,801 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:14,825 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:14,850 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:14,894 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:14,894 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 17:42:14,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:14,931 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:42:14,931 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:14,972 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:14,973 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:42:15,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,007 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:42:15,007 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-01-18 17:42:15,008 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:15,049 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:15,049 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:59 [2019-01-18 17:42:15,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-18 17:42:15,085 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:15,129 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:15,129 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:69, output treesize:47 [2019-01-18 17:42:15,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,165 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:42:15,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:15,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-18 17:42:15,167 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:15,216 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. [2019-01-18 17:42:15,216 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2019-01-18 17:42:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:15,239 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:42:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:15,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:42:15,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-18 17:42:15,308 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:42:15,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 17:42:15,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 17:42:15,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:42:15,308 INFO L87 Difference]: Start difference. First operand 2639 states and 18434 transitions. Second operand 12 states. [2019-01-18 17:42:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:42:18,774 INFO L93 Difference]: Finished difference Result 3636 states and 24951 transitions. [2019-01-18 17:42:18,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-18 17:42:18,774 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-18 17:42:18,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:42:18,785 INFO L225 Difference]: With dead ends: 3636 [2019-01-18 17:42:18,785 INFO L226 Difference]: Without dead ends: 3626 [2019-01-18 17:42:18,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2019-01-18 17:42:18,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3626 states. [2019-01-18 17:42:21,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3626 to 2790. [2019-01-18 17:42:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2790 states. [2019-01-18 17:42:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 19490 transitions. [2019-01-18 17:42:21,202 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 19490 transitions. Word has length 6 [2019-01-18 17:42:21,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:42:21,203 INFO L480 AbstractCegarLoop]: Abstraction has 2790 states and 19490 transitions. [2019-01-18 17:42:21,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 17:42:21,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 19490 transitions. [2019-01-18 17:42:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-18 17:42:21,207 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:42:21,207 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-18 17:42:21,207 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:42:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:21,207 INFO L82 PathProgramCache]: Analyzing trace with hash 900752924, now seen corresponding path program 2 times [2019-01-18 17:42:21,207 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:42:21,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:21,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:21,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:21,208 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:42:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:21,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:21,261 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:42:21,261 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:42:21,261 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:42:21,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:21,262 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:42:21,271 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 17:42:21,271 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 17:42:21,277 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 17:42:21,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:42:21,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:42:21,282 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 21 treesize of output 24 [2019-01-18 17:42:21,285 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 24 treesize of output 26 [2019-01-18 17:42:21,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 17:42:21,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,298 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 28 treesize of output 50 [2019-01-18 17:42:21,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,306 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 30 treesize of output 68 [2019-01-18 17:42:21,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,318 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:42:21,318 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:21,355 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:21,373 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:21,388 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:21,401 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:21,414 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:21,441 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 63 treesize of output 56 [2019-01-18 17:42:21,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,460 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 53 treesize of output 63 [2019-01-18 17:42:21,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,501 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 46 treesize of output 68 [2019-01-18 17:42:21,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,553 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 37 treesize of output 76 [2019-01-18 17:42:21,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,617 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:42:21,618 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:21,641 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:21,664 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:21,687 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:21,712 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:21,753 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:21,753 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-18 17:42:21,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,781 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-18 17:42:21,781 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:21,822 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:21,822 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-01-18 17:42:21,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:21,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 111 [2019-01-18 17:42:21,862 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:42:22,004 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-18 17:42:22,004 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:98 [2019-01-18 17:42:22,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:22,103 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:42:22,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 17:42:22,104 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:22,138 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:22,138 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:36 [2019-01-18 17:42:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:22,154 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:42:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:22,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:42:22,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:42:22,210 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:42:22,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:42:22,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:42:22,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:42:22,211 INFO L87 Difference]: Start difference. First operand 2790 states and 19490 transitions. Second operand 10 states. [2019-01-18 17:42:26,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:42:26,238 INFO L93 Difference]: Finished difference Result 4300 states and 29900 transitions. [2019-01-18 17:42:26,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 17:42:26,238 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-18 17:42:26,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:42:26,251 INFO L225 Difference]: With dead ends: 4300 [2019-01-18 17:42:26,251 INFO L226 Difference]: Without dead ends: 4298 [2019-01-18 17:42:26,253 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2019-01-18 17:42:26,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2019-01-18 17:42:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 4076. [2019-01-18 17:42:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4076 states. [2019-01-18 17:42:29,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4076 states to 4076 states and 28660 transitions. [2019-01-18 17:42:29,878 INFO L78 Accepts]: Start accepts. Automaton has 4076 states and 28660 transitions. Word has length 6 [2019-01-18 17:42:29,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:42:29,878 INFO L480 AbstractCegarLoop]: Abstraction has 4076 states and 28660 transitions. [2019-01-18 17:42:29,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:42:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 4076 states and 28660 transitions. [2019-01-18 17:42:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:42:29,884 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:42:29,884 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:42:29,884 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:42:29,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:29,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2030611754, now seen corresponding path program 1 times [2019-01-18 17:42:29,884 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:42:29,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:29,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:42:29,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:29,885 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:42:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:42:29,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:29,954 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:42:29,954 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:42:29,954 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [24], [28], [29] [2019-01-18 17:42:29,955 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:42:29,955 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:42:29,958 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:42:29,958 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 17:42:29,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:29,958 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:42:29,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:29,958 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:42:29,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:29,966 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:42:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:29,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:42:29,992 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 21 treesize of output 24 [2019-01-18 17:42:29,994 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 24 treesize of output 30 [2019-01-18 17:42:29,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:29,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:29,999 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 26 treesize of output 40 [2019-01-18 17:42:30,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,006 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 28 treesize of output 54 [2019-01-18 17:42:30,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,013 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 30 treesize of output 72 [2019-01-18 17:42:30,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,022 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:42:30,023 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:30,062 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:30,084 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:30,102 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:30,116 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:30,129 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:30,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,162 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 68 treesize of output 71 [2019-01-18 17:42:30,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-18 17:42:30,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,256 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 46 treesize of output 72 [2019-01-18 17:42:30,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,310 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 37 treesize of output 80 [2019-01-18 17:42:30,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,379 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:42:30,379 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:30,404 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:30,428 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:30,453 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:30,478 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:30,521 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:30,522 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-18 17:42:30,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-18 17:42:30,563 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:30,604 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:30,604 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-18 17:42:30,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,643 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-18 17:42:30,643 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:30,690 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:30,690 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-01-18 17:42:30,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,738 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:42:30,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2019-01-18 17:42:30,739 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:30,788 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:30,788 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2019-01-18 17:42:30,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,830 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:42:30,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:30,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-18 17:42:30,833 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:30,877 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. [2019-01-18 17:42:30,878 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2019-01-18 17:42:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:30,906 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:42:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:30,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:42:30,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-01-18 17:42:30,977 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:42:30,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-18 17:42:30,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-18 17:42:30,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:42:30,977 INFO L87 Difference]: Start difference. First operand 4076 states and 28660 transitions. Second operand 11 states. [2019-01-18 17:42:35,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:42:35,248 INFO L93 Difference]: Finished difference Result 4236 states and 29539 transitions. [2019-01-18 17:42:35,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:42:35,249 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2019-01-18 17:42:35,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:42:35,262 INFO L225 Difference]: With dead ends: 4236 [2019-01-18 17:42:35,262 INFO L226 Difference]: Without dead ends: 4233 [2019-01-18 17:42:35,263 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-01-18 17:42:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4233 states. [2019-01-18 17:42:38,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4233 to 4163. [2019-01-18 17:42:38,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4163 states. [2019-01-18 17:42:38,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 29269 transitions. [2019-01-18 17:42:38,939 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 29269 transitions. Word has length 7 [2019-01-18 17:42:38,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:42:38,939 INFO L480 AbstractCegarLoop]: Abstraction has 4163 states and 29269 transitions. [2019-01-18 17:42:38,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-18 17:42:38,940 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 29269 transitions. [2019-01-18 17:42:38,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:42:38,945 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:42:38,945 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:42:38,945 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:42:38,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:38,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2030621364, now seen corresponding path program 1 times [2019-01-18 17:42:38,946 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:42:38,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:38,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:38,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:38,946 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:42:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:42:39,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:39,051 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:42:39,051 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:42:39,051 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [22], [28], [29] [2019-01-18 17:42:39,052 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:42:39,052 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:42:39,053 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:42:39,053 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 17:42:39,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:39,054 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:42:39,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:39,054 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:42:39,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:39,063 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:42:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:39,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:42:39,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,086 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 48 treesize of output 54 [2019-01-18 17:42:39,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2019-01-18 17:42:39,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,156 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 32 treesize of output 61 [2019-01-18 17:42:39,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:42:39,208 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:39,226 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:39,243 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:39,261 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:39,382 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:42:39,398 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 30 [2019-01-18 17:42:39,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:42:39,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:42:39,408 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 30 treesize of output 72 [2019-01-18 17:42:39,417 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:42:39,418 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:39,529 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:39,548 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:39,563 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:39,576 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:39,587 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:39,617 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:39,618 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:72, output treesize:71 [2019-01-18 17:42:39,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,682 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 17:42:39,683 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:39,708 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:39,708 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2019-01-18 17:42:39,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 17:42:39,745 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:39,777 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:39,777 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:40 [2019-01-18 17:42:39,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,813 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:42:39,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 94 [2019-01-18 17:42:39,814 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:39,846 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:39,847 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:36 [2019-01-18 17:42:39,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:39,896 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:42:39,896 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-01-18 17:42:39,897 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:39,929 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:39,929 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:40 [2019-01-18 17:42:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:39,954 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:42:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:40,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:42:40,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-18 17:42:40,031 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:42:40,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 17:42:40,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 17:42:40,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:42:40,031 INFO L87 Difference]: Start difference. First operand 4163 states and 29269 transitions. Second operand 12 states. [2019-01-18 17:42:44,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:42:44,152 INFO L93 Difference]: Finished difference Result 4232 states and 29577 transitions. [2019-01-18 17:42:44,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:42:44,153 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-01-18 17:42:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:42:44,166 INFO L225 Difference]: With dead ends: 4232 [2019-01-18 17:42:44,167 INFO L226 Difference]: Without dead ends: 4231 [2019-01-18 17:42:44,168 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2019-01-18 17:42:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2019-01-18 17:42:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 4190. [2019-01-18 17:42:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4190 states. [2019-01-18 17:42:47,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4190 states to 4190 states and 29458 transitions. [2019-01-18 17:42:47,912 INFO L78 Accepts]: Start accepts. Automaton has 4190 states and 29458 transitions. Word has length 7 [2019-01-18 17:42:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:42:47,913 INFO L480 AbstractCegarLoop]: Abstraction has 4190 states and 29458 transitions. [2019-01-18 17:42:47,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 17:42:47,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4190 states and 29458 transitions. [2019-01-18 17:42:47,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:42:47,918 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:42:47,918 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:42:47,918 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:42:47,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:47,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2030548264, now seen corresponding path program 1 times [2019-01-18 17:42:47,919 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:42:47,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:47,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:47,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:47,920 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:42:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:42:48,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:48,033 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:42:48,033 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:42:48,033 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [28], [30], [31] [2019-01-18 17:42:48,034 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:42:48,034 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:42:48,036 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:42:48,036 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:42:48,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:48,037 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:42:48,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:48,037 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:42:48,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:48,046 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:42:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:48,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:42:48,054 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 63 treesize of output 56 [2019-01-18 17:42:48,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,074 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 53 treesize of output 63 [2019-01-18 17:42:48,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,117 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 46 treesize of output 68 [2019-01-18 17:42:48,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,173 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 37 treesize of output 76 [2019-01-18 17:42:48,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:42:48,243 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:48,271 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:48,298 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:48,326 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:48,358 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:48,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:42:48,397 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-18 17:42:48,401 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 17:42:48,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 17:42:48,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 17:42:48,443 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:42:48,444 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:48,475 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:48,493 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:48,506 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:48,518 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:48,529 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:48,570 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:48,570 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-18 17:42:48,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,604 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-01-18 17:42:48,604 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:48,643 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:48,644 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-01-18 17:42:48,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,695 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 113 [2019-01-18 17:42:48,696 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:42:48,837 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-18 17:42:48,837 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:98 [2019-01-18 17:42:48,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,922 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:42:48,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:48,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2019-01-18 17:42:48,925 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:48,958 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:48,958 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2019-01-18 17:42:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:48,982 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:42:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:49,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:42:49,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:42:49,031 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:42:49,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:42:49,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:42:49,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:42:49,031 INFO L87 Difference]: Start difference. First operand 4190 states and 29458 transitions. Second operand 10 states. [2019-01-18 17:42:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:42:53,174 INFO L93 Difference]: Finished difference Result 4570 states and 31903 transitions. [2019-01-18 17:42:53,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:42:53,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-18 17:42:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:42:53,187 INFO L225 Difference]: With dead ends: 4570 [2019-01-18 17:42:53,187 INFO L226 Difference]: Without dead ends: 4569 [2019-01-18 17:42:53,188 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:42:53,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4569 states. [2019-01-18 17:42:57,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4569 to 4419. [2019-01-18 17:42:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4419 states. [2019-01-18 17:42:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 31072 transitions. [2019-01-18 17:42:57,096 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 31072 transitions. Word has length 7 [2019-01-18 17:42:57,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:42:57,096 INFO L480 AbstractCegarLoop]: Abstraction has 4419 states and 31072 transitions. [2019-01-18 17:42:57,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:42:57,096 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 31072 transitions. [2019-01-18 17:42:57,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:42:57,102 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:42:57,102 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:42:57,102 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:42:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:57,102 INFO L82 PathProgramCache]: Analyzing trace with hash -2030561782, now seen corresponding path program 1 times [2019-01-18 17:42:57,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:42:57,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:57,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:57,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:42:57,103 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:42:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:42:57,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:57,313 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:42:57,313 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:42:57,313 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [24], [28], [29] [2019-01-18 17:42:57,314 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:42:57,314 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:42:57,316 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:42:57,316 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 17:42:57,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:42:57,316 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:42:57,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:42:57,316 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:42:57,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:42:57,326 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:42:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:42:57,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:42:57,351 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 21 treesize of output 24 [2019-01-18 17:42:57,353 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 24 treesize of output 30 [2019-01-18 17:42:57,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,357 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 26 treesize of output 40 [2019-01-18 17:42:57,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,363 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 28 treesize of output 54 [2019-01-18 17:42:57,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,371 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 30 treesize of output 72 [2019-01-18 17:42:57,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,380 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:42:57,381 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:57,420 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:57,441 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:57,459 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:57,473 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:57,486 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:57,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,518 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 68 treesize of output 71 [2019-01-18 17:42:57,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-18 17:42:57,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,596 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-18 17:42:57,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,651 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 37 treesize of output 80 [2019-01-18 17:42:57,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:42:57,719 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:57,744 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:57,768 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:57,793 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:57,818 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:42:57,861 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:57,861 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-18 17:42:57,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,904 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-18 17:42:57,905 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:57,945 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:57,945 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-18 17:42:57,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:57,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-18 17:42:57,987 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:58,033 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:58,033 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-01-18 17:42:58,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,075 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:42:58,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-18 17:42:58,078 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:58,355 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:42:58,355 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-18 17:42:58,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:42:58,402 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:42:58,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 131 [2019-01-18 17:42:58,403 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:42:58,455 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. [2019-01-18 17:42:58,455 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:47 [2019-01-18 17:42:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:58,483 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:42:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:42:58,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:42:58,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-18 17:42:58,582 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:42:58,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 17:42:58,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 17:42:58,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:42:58,582 INFO L87 Difference]: Start difference. First operand 4419 states and 31072 transitions. Second operand 12 states. [2019-01-18 17:43:04,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:43:04,519 INFO L93 Difference]: Finished difference Result 5928 states and 41521 transitions. [2019-01-18 17:43:04,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 17:43:04,520 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-01-18 17:43:04,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:43:04,537 INFO L225 Difference]: With dead ends: 5928 [2019-01-18 17:43:04,537 INFO L226 Difference]: Without dead ends: 5927 [2019-01-18 17:43:04,538 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2019-01-18 17:43:04,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5927 states. [2019-01-18 17:43:09,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5927 to 5628. [2019-01-18 17:43:09,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5628 states. [2019-01-18 17:43:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 39710 transitions. [2019-01-18 17:43:09,841 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 39710 transitions. Word has length 7 [2019-01-18 17:43:09,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:43:09,841 INFO L480 AbstractCegarLoop]: Abstraction has 5628 states and 39710 transitions. [2019-01-18 17:43:09,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 17:43:09,841 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 39710 transitions. [2019-01-18 17:43:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:43:09,848 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:43:09,848 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:43:09,848 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:43:09,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:43:09,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2030965338, now seen corresponding path program 1 times [2019-01-18 17:43:09,849 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:43:09,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:43:09,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:43:09,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:43:09,849 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:43:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:43:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:43:09,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:43:09,963 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:43:09,963 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:43:09,964 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [28], [30], [31] [2019-01-18 17:43:09,964 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:43:09,965 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:43:09,966 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:43:09,966 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:43:09,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:43:09,966 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:43:09,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:43:09,966 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:43:09,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:43:09,976 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:43:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:43:09,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:43:09,985 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 21 treesize of output 24 [2019-01-18 17:43:09,987 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 24 treesize of output 26 [2019-01-18 17:43:09,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:09,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:09,995 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 26 treesize of output 36 [2019-01-18 17:43:09,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,002 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 28 treesize of output 50 [2019-01-18 17:43:10,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,010 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 30 treesize of output 68 [2019-01-18 17:43:10,020 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:43:10,020 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:10,051 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:10,071 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:10,087 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:10,099 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:10,111 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:10,132 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 43 treesize of output 39 [2019-01-18 17:43:10,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,148 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 36 treesize of output 49 [2019-01-18 17:43:10,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,183 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 32 treesize of output 57 [2019-01-18 17:43:10,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:43:10,228 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:10,242 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:10,256 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:10,271 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:10,300 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:43:10,300 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:64, output treesize:67 [2019-01-18 17:43:10,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,349 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2019-01-18 17:43:10,350 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:10,373 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:43:10,374 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:46 [2019-01-18 17:43:10,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 88 [2019-01-18 17:43:10,417 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:43:10,530 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-18 17:43:10,530 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:68 [2019-01-18 17:43:10,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,580 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:43:10,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 101 [2019-01-18 17:43:10,581 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:10,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:10,645 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:43:10,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 73 [2019-01-18 17:43:10,646 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:10,686 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 2 xjuncts. [2019-01-18 17:43:10,686 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:88, output treesize:70 [2019-01-18 17:43:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:43:10,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:43:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:43:10,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:43:10,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2019-01-18 17:43:10,791 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:43:10,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-18 17:43:10,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-18 17:43:10,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:43:10,792 INFO L87 Difference]: Start difference. First operand 5628 states and 39710 transitions. Second operand 11 states. [2019-01-18 17:43:17,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:43:17,653 INFO L93 Difference]: Finished difference Result 6511 states and 45570 transitions. [2019-01-18 17:43:17,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 17:43:17,654 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2019-01-18 17:43:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:43:17,673 INFO L225 Difference]: With dead ends: 6511 [2019-01-18 17:43:17,673 INFO L226 Difference]: Without dead ends: 6510 [2019-01-18 17:43:17,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-01-18 17:43:17,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6510 states. [2019-01-18 17:43:24,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6510 to 6405. [2019-01-18 17:43:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6405 states. [2019-01-18 17:43:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6405 states to 6405 states and 45149 transitions. [2019-01-18 17:43:24,455 INFO L78 Accepts]: Start accepts. Automaton has 6405 states and 45149 transitions. Word has length 7 [2019-01-18 17:43:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:43:24,455 INFO L480 AbstractCegarLoop]: Abstraction has 6405 states and 45149 transitions. [2019-01-18 17:43:24,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-18 17:43:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 6405 states and 45149 transitions. [2019-01-18 17:43:24,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:43:24,464 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:43:24,464 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:43:24,464 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:43:24,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:43:24,464 INFO L82 PathProgramCache]: Analyzing trace with hash -2015785446, now seen corresponding path program 1 times [2019-01-18 17:43:24,464 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:43:24,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:43:24,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:43:24,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:43:24,465 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:43:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:43:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:43:24,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:43:24,755 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:43:24,755 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:43:24,755 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [24], [28], [29] [2019-01-18 17:43:24,756 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:43:24,756 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:43:24,757 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:43:24,758 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 17:43:24,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:43:24,758 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:43:24,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:43:24,758 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:43:24,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:43:24,767 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:43:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:43:24,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:43:24,775 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 63 treesize of output 56 [2019-01-18 17:43:24,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,792 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 53 treesize of output 63 [2019-01-18 17:43:24,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,831 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 46 treesize of output 68 [2019-01-18 17:43:24,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,882 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2019-01-18 17:43:24,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:24,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:43:24,949 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:24,971 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:24,995 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:25,019 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:25,045 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:25,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:43:25,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-18 17:43:25,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 17:43:25,090 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 17:43:25,094 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 17:43:25,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:43:25,099 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:25,130 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:25,148 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:25,162 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:25,173 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:25,184 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:25,225 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:43:25,225 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:84, output treesize:87 [2019-01-18 17:43:25,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,296 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2019-01-18 17:43:25,296 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:25,323 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:43:25,323 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2019-01-18 17:43:25,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,363 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2019-01-18 17:43:25,363 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:25,393 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:43:25,393 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:40 [2019-01-18 17:43:25,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,432 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:43:25,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 93 [2019-01-18 17:43:25,434 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:25,467 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:43:25,467 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:34 [2019-01-18 17:43:25,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:25,507 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:43:25,507 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 100 [2019-01-18 17:43:25,508 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:25,540 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:43:25,540 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:38 [2019-01-18 17:43:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:43:25,566 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:43:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:43:25,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:43:25,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2019-01-18 17:43:25,650 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:43:25,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-01-18 17:43:25,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-01-18 17:43:25,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:43:25,651 INFO L87 Difference]: Start difference. First operand 6405 states and 45149 transitions. Second operand 13 states. [2019-01-18 17:43:26,470 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2019-01-18 17:43:34,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:43:34,267 INFO L93 Difference]: Finished difference Result 7179 states and 50083 transitions. [2019-01-18 17:43:34,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-01-18 17:43:34,268 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2019-01-18 17:43:34,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:43:34,290 INFO L225 Difference]: With dead ends: 7179 [2019-01-18 17:43:34,290 INFO L226 Difference]: Without dead ends: 7170 [2019-01-18 17:43:34,292 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2019-01-18 17:43:34,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7170 states. [2019-01-18 17:43:41,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7170 to 6542. [2019-01-18 17:43:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6542 states. [2019-01-18 17:43:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6542 states to 6542 states and 46140 transitions. [2019-01-18 17:43:41,201 INFO L78 Accepts]: Start accepts. Automaton has 6542 states and 46140 transitions. Word has length 7 [2019-01-18 17:43:41,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:43:41,201 INFO L480 AbstractCegarLoop]: Abstraction has 6542 states and 46140 transitions. [2019-01-18 17:43:41,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-01-18 17:43:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 6542 states and 46140 transitions. [2019-01-18 17:43:41,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:43:41,208 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:43:41,208 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:43:41,208 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:43:41,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:43:41,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2015650778, now seen corresponding path program 1 times [2019-01-18 17:43:41,208 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:43:41,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:43:41,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:43:41,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:43:41,209 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:43:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:43:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:43:41,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:43:41,248 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:43:41,249 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:43:41,249 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [28], [30], [32], [33] [2019-01-18 17:43:41,250 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:43:41,250 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:43:41,252 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:43:41,252 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:43:41,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:43:41,252 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:43:41,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:43:41,252 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:43:41,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:43:41,262 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:43:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:43:41,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:43:41,271 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 38 treesize of output 37 [2019-01-18 17:43:41,273 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 37 treesize of output 36 [2019-01-18 17:43:41,385 INFO L303 Elim1Store]: Index analysis took 111 ms [2019-01-18 17:43:41,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2019-01-18 17:43:41,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:41,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:41,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:41,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:41,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 56 [2019-01-18 17:43:41,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:41,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:41,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:41,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:41,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:41,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:41,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:41,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:41,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 37 [2019-01-18 17:43:41,458 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:41,473 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:41,489 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:41,505 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:41,521 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:41,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 21 treesize of output 24 [2019-01-18 17:43:41,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-18 17:43:41,551 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2019-01-18 17:43:41,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2019-01-18 17:43:41,570 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 30 treesize of output 48 [2019-01-18 17:43:41,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:43:41,580 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:41,603 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:41,614 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:41,625 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:41,636 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:41,647 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:43:41,677 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. [2019-01-18 17:43:41,677 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:59, output treesize:67 [2019-01-18 17:43:41,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:41,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 79 [2019-01-18 17:43:41,728 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2019-01-18 17:43:41,981 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 20 dim-0 vars, and 8 xjuncts. [2019-01-18 17:43:41,981 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:369 [2019-01-18 17:43:42,647 WARN L181 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 20 [2019-01-18 17:43:42,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:42,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:42,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:42,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:43:42,655 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 42 [2019-01-18 17:43:42,655 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:43:42,667 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:43:42,667 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:18 [2019-01-18 17:43:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:43:42,680 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:43:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:43:42,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:43:42,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-18 17:43:42,710 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:43:42,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:43:42,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:43:42,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:43:42,711 INFO L87 Difference]: Start difference. First operand 6542 states and 46140 transitions. Second operand 8 states. [2019-01-18 17:43:52,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:43:52,374 INFO L93 Difference]: Finished difference Result 10441 states and 73753 transitions. [2019-01-18 17:43:52,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:43:52,375 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-01-18 17:43:52,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:43:52,408 INFO L225 Difference]: With dead ends: 10441 [2019-01-18 17:43:52,408 INFO L226 Difference]: Without dead ends: 10440 [2019-01-18 17:43:52,410 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:43:52,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10440 states. [2019-01-18 17:44:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10440 to 10397. [2019-01-18 17:44:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10397 states. [2019-01-18 17:44:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10397 states to 10397 states and 73709 transitions. [2019-01-18 17:44:02,912 INFO L78 Accepts]: Start accepts. Automaton has 10397 states and 73709 transitions. Word has length 7 [2019-01-18 17:44:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:44:02,912 INFO L480 AbstractCegarLoop]: Abstraction has 10397 states and 73709 transitions. [2019-01-18 17:44:02,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:44:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 10397 states and 73709 transitions. [2019-01-18 17:44:02,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:44:02,922 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:44:02,922 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:44:02,922 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:44:02,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:44:02,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2014341960, now seen corresponding path program 1 times [2019-01-18 17:44:02,922 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:44:02,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:44:02,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:44:02,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:44:02,923 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:44:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:44:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:44:03,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:44:03,053 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:44:03,053 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:44:03,053 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [24], [28], [30], [31] [2019-01-18 17:44:03,054 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:44:03,054 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:44:03,055 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:44:03,055 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:44:03,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:44:03,056 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:44:03,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:44:03,056 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:44:03,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:44:03,064 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:44:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:44:03,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:44:03,073 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 21 treesize of output 24 [2019-01-18 17:44:03,076 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 24 treesize of output 26 [2019-01-18 17:44:03,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,081 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 26 treesize of output 36 [2019-01-18 17:44:03,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,089 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 28 treesize of output 50 [2019-01-18 17:44:03,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,097 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 17:44:03,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,107 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:44:03,108 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:03,144 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:03,165 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:03,179 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:03,192 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:03,205 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:03,231 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 63 treesize of output 56 [2019-01-18 17:44:03,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,250 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 53 treesize of output 63 [2019-01-18 17:44:03,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,292 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 46 treesize of output 68 [2019-01-18 17:44:03,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,343 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 37 treesize of output 76 [2019-01-18 17:44:03,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:44:03,408 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:03,431 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:03,453 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:03,476 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:03,500 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:03,541 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:44:03,541 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-18 17:44:03,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,572 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-01-18 17:44:03,573 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:03,612 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:44:03,612 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-01-18 17:44:03,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,646 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:44:03,646 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 102 [2019-01-18 17:44:03,647 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:03,689 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:44:03,689 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:55 [2019-01-18 17:44:03,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:03,727 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:44:03,735 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 108 [2019-01-18 17:44:03,737 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:44:03,867 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2019-01-18 17:44:03,868 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:69, output treesize:102 [2019-01-18 17:44:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:44:03,917 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:44:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:44:03,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:44:03,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:44:03,974 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:44:03,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:44:03,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:44:03,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:44:03,975 INFO L87 Difference]: Start difference. First operand 10397 states and 73709 transitions. Second operand 10 states. [2019-01-18 17:44:13,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:44:13,864 INFO L93 Difference]: Finished difference Result 10427 states and 73743 transitions. [2019-01-18 17:44:13,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:44:13,865 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-18 17:44:13,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:44:13,898 INFO L225 Difference]: With dead ends: 10427 [2019-01-18 17:44:13,898 INFO L226 Difference]: Without dead ends: 10426 [2019-01-18 17:44:13,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:44:13,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10426 states. [2019-01-18 17:44:24,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10426 to 10394. [2019-01-18 17:44:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10394 states. [2019-01-18 17:44:24,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10394 states to 10394 states and 73688 transitions. [2019-01-18 17:44:24,504 INFO L78 Accepts]: Start accepts. Automaton has 10394 states and 73688 transitions. Word has length 7 [2019-01-18 17:44:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:44:24,504 INFO L480 AbstractCegarLoop]: Abstraction has 10394 states and 73688 transitions. [2019-01-18 17:44:24,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:44:24,505 INFO L276 IsEmpty]: Start isEmpty. Operand 10394 states and 73688 transitions. [2019-01-18 17:44:24,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:44:24,514 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:44:24,514 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:44:24,514 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:44:24,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:44:24,515 INFO L82 PathProgramCache]: Analyzing trace with hash -2026927280, now seen corresponding path program 1 times [2019-01-18 17:44:24,515 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:44:24,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:44:24,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:44:24,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:44:24,516 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:44:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:44:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:44:24,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:44:24,572 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:44:24,572 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:44:24,572 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [28], [29] [2019-01-18 17:44:24,573 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:44:24,573 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:44:24,574 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:44:24,574 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 17:44:24,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:44:24,574 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:44:24,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:44:24,575 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:44:24,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:44:24,593 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:44:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:44:24,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:44:24,602 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 21 treesize of output 24 [2019-01-18 17:44:24,604 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 24 treesize of output 26 [2019-01-18 17:44:24,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,610 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 26 treesize of output 36 [2019-01-18 17:44:24,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,616 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 28 treesize of output 50 [2019-01-18 17:44:24,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,625 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 30 treesize of output 68 [2019-01-18 17:44:24,634 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:44:24,635 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:24,660 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:24,680 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:24,695 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:24,707 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:24,719 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:24,742 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 43 treesize of output 39 [2019-01-18 17:44:24,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,758 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 36 treesize of output 49 [2019-01-18 17:44:24,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,793 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 32 treesize of output 57 [2019-01-18 17:44:24,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:44:24,836 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:24,850 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:24,863 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:24,879 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:24,907 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:44:24,907 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:64, output treesize:67 [2019-01-18 17:44:24,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:24,957 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2019-01-18 17:44:24,957 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:24,984 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:44:24,985 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2019-01-18 17:44:25,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,010 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:44:25,010 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 60 [2019-01-18 17:44:25,011 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:25,030 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:44:25,030 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:29 [2019-01-18 17:44:25,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,056 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 61 [2019-01-18 17:44:25,056 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:25,075 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:44:25,075 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:29 [2019-01-18 17:44:25,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:25,103 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:44:25,103 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 75 [2019-01-18 17:44:25,104 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:25,126 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:44:25,126 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:33 [2019-01-18 17:44:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:44:25,146 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:44:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:44:25,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:44:25,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-18 17:44:25,216 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:44:25,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 17:44:25,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 17:44:25,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:44:25,216 INFO L87 Difference]: Start difference. First operand 10394 states and 73688 transitions. Second operand 12 states. [2019-01-18 17:44:35,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:44:35,948 INFO L93 Difference]: Finished difference Result 11408 states and 80747 transitions. [2019-01-18 17:44:35,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 17:44:35,949 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-01-18 17:44:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:44:35,989 INFO L225 Difference]: With dead ends: 11408 [2019-01-18 17:44:35,989 INFO L226 Difference]: Without dead ends: 11406 [2019-01-18 17:44:35,992 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2019-01-18 17:44:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11406 states. [2019-01-18 17:44:47,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11406 to 11270. [2019-01-18 17:44:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11270 states. [2019-01-18 17:44:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11270 states to 11270 states and 80138 transitions. [2019-01-18 17:44:47,122 INFO L78 Accepts]: Start accepts. Automaton has 11270 states and 80138 transitions. Word has length 7 [2019-01-18 17:44:47,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:44:47,122 INFO L480 AbstractCegarLoop]: Abstraction has 11270 states and 80138 transitions. [2019-01-18 17:44:47,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 17:44:47,122 INFO L276 IsEmpty]: Start isEmpty. Operand 11270 states and 80138 transitions. [2019-01-18 17:44:47,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:44:47,132 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:44:47,132 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-01-18 17:44:47,133 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:44:47,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:44:47,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2023700554, now seen corresponding path program 2 times [2019-01-18 17:44:47,133 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:44:47,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:44:47,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:44:47,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:44:47,133 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:44:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:44:47,277 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2019-01-18 17:44:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:44:47,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:44:47,355 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:44:47,355 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:44:47,355 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:44:47,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:44:47,355 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:44:47,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 17:44:47,365 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 17:44:47,373 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-01-18 17:44:47,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:44:47,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:44:47,395 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 21 treesize of output 24 [2019-01-18 17:44:47,412 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 24 treesize of output 30 [2019-01-18 17:44:47,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,481 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 26 treesize of output 40 [2019-01-18 17:44:47,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,571 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:44:47,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,674 INFO L303 Elim1Store]: Index analysis took 102 ms [2019-01-18 17:44:47,675 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 30 treesize of output 72 [2019-01-18 17:44:47,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,713 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:44:47,713 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:47,750 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:47,771 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:47,788 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:47,803 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:47,815 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:47,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,848 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 68 treesize of output 71 [2019-01-18 17:44:47,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,885 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 58 treesize of output 67 [2019-01-18 17:44:47,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,930 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 46 treesize of output 72 [2019-01-18 17:44:47,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:47,983 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-18 17:44:48,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,050 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:44:48,051 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:48,076 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:48,100 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:48,124 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:48,149 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:44:48,193 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:44:48,193 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 17:44:48,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,229 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-18 17:44:48,229 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:48,271 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:44:48,271 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-18 17:44:48,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-18 17:44:48,310 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:48,356 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:44:48,356 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-01-18 17:44:48,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,395 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:44:48,396 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-18 17:44:48,396 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:48,444 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:44:48,445 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:49 [2019-01-18 17:44:48,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,554 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:44:48,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,556 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-18 17:44:48,556 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:48,605 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:44:48,605 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:43 [2019-01-18 17:44:48,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:44:48,650 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 125 [2019-01-18 17:44:48,651 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:44:48,701 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. [2019-01-18 17:44:48,702 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:57, output treesize:41 [2019-01-18 17:44:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:44:48,726 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:44:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:44:48,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:44:48,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2019-01-18 17:44:48,818 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:44:48,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-01-18 17:44:48,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-01-18 17:44:48,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2019-01-18 17:44:48,819 INFO L87 Difference]: Start difference. First operand 11270 states and 80138 transitions. Second operand 13 states. [2019-01-18 17:45:03,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:45:03,219 INFO L93 Difference]: Finished difference Result 14692 states and 103813 transitions. [2019-01-18 17:45:03,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-18 17:45:03,220 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2019-01-18 17:45:03,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:45:03,273 INFO L225 Difference]: With dead ends: 14692 [2019-01-18 17:45:03,274 INFO L226 Difference]: Without dead ends: 14688 [2019-01-18 17:45:03,277 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2019-01-18 17:45:03,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14688 states. [2019-01-18 17:45:17,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14688 to 12758. [2019-01-18 17:45:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12758 states. [2019-01-18 17:45:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12758 states to 12758 states and 90546 transitions. [2019-01-18 17:45:17,509 INFO L78 Accepts]: Start accepts. Automaton has 12758 states and 90546 transitions. Word has length 7 [2019-01-18 17:45:17,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:45:17,509 INFO L480 AbstractCegarLoop]: Abstraction has 12758 states and 90546 transitions. [2019-01-18 17:45:17,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-01-18 17:45:17,509 INFO L276 IsEmpty]: Start isEmpty. Operand 12758 states and 90546 transitions. [2019-01-18 17:45:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:45:17,520 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:45:17,520 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:45:17,520 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:45:17,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:45:17,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2023160096, now seen corresponding path program 1 times [2019-01-18 17:45:17,520 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:45:17,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:45:17,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:45:17,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:45:17,521 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:45:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:45:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:45:17,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:45:17,562 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:45:17,562 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:45:17,562 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [24], [28], [30], [31] [2019-01-18 17:45:17,562 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:45:17,563 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:45:17,564 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:45:17,564 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:45:17,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:45:17,565 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:45:17,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:45:17,565 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:45:17,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:45:17,573 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:45:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:45:17,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:45:17,598 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 21 treesize of output 24 [2019-01-18 17:45:17,602 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 24 treesize of output 26 [2019-01-18 17:45:17,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,608 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 26 treesize of output 36 [2019-01-18 17:45:17,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,617 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 28 treesize of output 50 [2019-01-18 17:45:17,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 17:45:17,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,650 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:45:17,650 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:45:17,687 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:17,706 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:17,721 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:17,732 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:17,745 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:17,772 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 63 treesize of output 56 [2019-01-18 17:45:17,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,791 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 53 treesize of output 63 [2019-01-18 17:45:17,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,832 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 46 treesize of output 68 [2019-01-18 17:45:17,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,884 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 37 treesize of output 76 [2019-01-18 17:45:17,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:17,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:45:17,949 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:45:17,972 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:17,994 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:18,017 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:18,042 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:18,083 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:45:18,083 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-18 17:45:18,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,113 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2019-01-18 17:45:18,114 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:45:18,153 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:45:18,153 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-01-18 17:45:18,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 109 [2019-01-18 17:45:18,211 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:45:18,253 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:45:18,253 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2019-01-18 17:45:18,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,286 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:45:18,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:18,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-18 17:45:18,288 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:45:18,332 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. [2019-01-18 17:45:18,332 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:43 [2019-01-18 17:45:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:45:18,353 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:45:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:45:18,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:45:18,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:45:18,402 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:45:18,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:45:18,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:45:18,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:45:18,403 INFO L87 Difference]: Start difference. First operand 12758 states and 90546 transitions. Second operand 10 states. [2019-01-18 17:45:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:45:30,998 INFO L93 Difference]: Finished difference Result 13016 states and 92075 transitions. [2019-01-18 17:45:30,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:45:30,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-18 17:45:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:45:31,042 INFO L225 Difference]: With dead ends: 13016 [2019-01-18 17:45:31,043 INFO L226 Difference]: Without dead ends: 13015 [2019-01-18 17:45:31,045 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:45:31,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13015 states. [2019-01-18 17:45:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13015 to 12958. [2019-01-18 17:45:45,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12958 states. [2019-01-18 17:45:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12958 states to 12958 states and 91946 transitions. [2019-01-18 17:45:45,220 INFO L78 Accepts]: Start accepts. Automaton has 12958 states and 91946 transitions. Word has length 7 [2019-01-18 17:45:45,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:45:45,220 INFO L480 AbstractCegarLoop]: Abstraction has 12958 states and 91946 transitions. [2019-01-18 17:45:45,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:45:45,220 INFO L276 IsEmpty]: Start isEmpty. Operand 12958 states and 91946 transitions. [2019-01-18 17:45:45,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:45:45,232 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:45:45,232 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-01-18 17:45:45,232 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:45:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:45:45,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1920990370, now seen corresponding path program 1 times [2019-01-18 17:45:45,233 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:45:45,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:45:45,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:45:45,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:45:45,234 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:45:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:45:45,454 WARN L181 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 13 [2019-01-18 17:45:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:45:45,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:45:45,465 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:45:45,465 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:45:45,465 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [30], [32], [33] [2019-01-18 17:45:45,466 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:45:45,466 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:45:45,468 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:45:45,468 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 70 root evaluator evaluations with a maximum evaluation depth of 2. Performed 70 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:45:45,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:45:45,469 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:45:45,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:45:45,469 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:45:45,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:45:45,477 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:45:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:45:45,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:45:45,485 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 21 treesize of output 24 [2019-01-18 17:45:45,488 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 24 treesize of output 26 [2019-01-18 17:45:45,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,496 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 26 treesize of output 36 [2019-01-18 17:45:45,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,503 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 28 treesize of output 50 [2019-01-18 17:45:45,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,512 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 30 treesize of output 68 [2019-01-18 17:45:45,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:45:45,520 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:45:45,546 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:45,566 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:45,581 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:45,593 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:45,605 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:45,628 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 43 treesize of output 39 [2019-01-18 17:45:45,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,644 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2019-01-18 17:45:45,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,678 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 32 treesize of output 57 [2019-01-18 17:45:45,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,722 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:45:45,723 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:45:45,737 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:45,750 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:45,766 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:45:45,794 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. [2019-01-18 17:45:45,795 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2019-01-18 17:45:45,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:45,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:45:45,841 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:45:45,929 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-18 17:45:45,929 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:88 [2019-01-18 17:45:46,152 WARN L181 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 24 [2019-01-18 17:45:46,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:46,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:46,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:46,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:46,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:46,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:45:46,162 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:45:46,162 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:45:46,181 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:45:46,181 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:33 [2019-01-18 17:45:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:45:46,196 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:45:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:45:46,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:45:46,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2019-01-18 17:45:46,228 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:45:46,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-01-18 17:45:46,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-01-18 17:45:46,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-18 17:45:46,229 INFO L87 Difference]: Start difference. First operand 12958 states and 91946 transitions. Second operand 7 states. [2019-01-18 17:45:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:45:58,158 INFO L93 Difference]: Finished difference Result 12974 states and 91967 transitions. [2019-01-18 17:45:58,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:45:58,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2019-01-18 17:45:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:45:58,205 INFO L225 Difference]: With dead ends: 12974 [2019-01-18 17:45:58,205 INFO L226 Difference]: Without dead ends: 12973 [2019-01-18 17:45:58,208 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:45:58,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12973 states. [2019-01-18 17:46:11,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12973 to 12958. [2019-01-18 17:46:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12958 states. [2019-01-18 17:46:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12958 states to 12958 states and 91946 transitions. [2019-01-18 17:46:11,830 INFO L78 Accepts]: Start accepts. Automaton has 12958 states and 91946 transitions. Word has length 7 [2019-01-18 17:46:11,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:46:11,830 INFO L480 AbstractCegarLoop]: Abstraction has 12958 states and 91946 transitions. [2019-01-18 17:46:11,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-01-18 17:46:11,830 INFO L276 IsEmpty]: Start isEmpty. Operand 12958 states and 91946 transitions. [2019-01-18 17:46:11,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:46:11,840 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:46:11,840 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:46:11,840 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:46:11,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:46:11,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1935645556, now seen corresponding path program 1 times [2019-01-18 17:46:11,841 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:46:11,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:46:11,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:46:11,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:46:11,842 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:46:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:46:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:46:11,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:46:11,972 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:46:11,973 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:46:11,973 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [24], [28], [30], [31] [2019-01-18 17:46:11,974 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:46:11,974 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:46:11,975 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:46:11,975 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:46:11,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:46:11,976 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:46:11,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:46:11,976 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:46:11,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:46:11,987 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:46:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:46:11,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:46:11,995 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 21 treesize of output 24 [2019-01-18 17:46:11,997 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 24 treesize of output 26 [2019-01-18 17:46:12,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 17:46:12,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,010 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 28 treesize of output 50 [2019-01-18 17:46:12,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,019 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 30 treesize of output 68 [2019-01-18 17:46:12,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,028 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:46:12,029 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:46:12,065 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:12,085 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:12,101 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:12,114 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:12,127 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:12,152 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 63 treesize of output 56 [2019-01-18 17:46:12,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,171 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 53 treesize of output 63 [2019-01-18 17:46:12,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,213 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 46 treesize of output 68 [2019-01-18 17:46:12,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,264 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 37 treesize of output 76 [2019-01-18 17:46:12,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:46:12,331 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:46:12,354 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:12,377 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:12,400 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:12,425 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:12,470 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:46:12,470 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-18 17:46:12,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,511 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:46:12,512 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:46:12,653 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-18 17:46:12,653 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:138 [2019-01-18 17:46:12,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,711 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:46:12,711 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:46:12,712 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:46:12,746 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:46:12,747 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:42 [2019-01-18 17:46:12,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:12,777 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-18 17:46:12,778 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:46:12,809 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:46:12,810 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:34 [2019-01-18 17:46:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:46:12,831 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:46:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:46:12,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:46:12,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:46:12,885 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:46:12,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:46:12,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:46:12,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:46:12,886 INFO L87 Difference]: Start difference. First operand 12958 states and 91946 transitions. Second operand 10 states. [2019-01-18 17:46:25,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:46:25,371 INFO L93 Difference]: Finished difference Result 13106 states and 92752 transitions. [2019-01-18 17:46:25,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 17:46:25,372 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-18 17:46:25,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:46:25,417 INFO L225 Difference]: With dead ends: 13106 [2019-01-18 17:46:25,417 INFO L226 Difference]: Without dead ends: 13105 [2019-01-18 17:46:25,420 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-01-18 17:46:25,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13105 states. [2019-01-18 17:46:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13105 to 13023. [2019-01-18 17:46:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13023 states. [2019-01-18 17:46:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13023 states to 13023 states and 92401 transitions. [2019-01-18 17:46:38,583 INFO L78 Accepts]: Start accepts. Automaton has 13023 states and 92401 transitions. Word has length 7 [2019-01-18 17:46:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:46:38,583 INFO L480 AbstractCegarLoop]: Abstraction has 13023 states and 92401 transitions. [2019-01-18 17:46:38,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:46:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 13023 states and 92401 transitions. [2019-01-18 17:46:38,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:46:38,593 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:46:38,593 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:46:38,593 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:46:38,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:46:38,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1935632038, now seen corresponding path program 1 times [2019-01-18 17:46:38,594 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:46:38,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:46:38,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:46:38,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:46:38,594 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:46:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:46:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:46:38,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:46:38,675 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:46:38,675 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:46:38,676 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [22], [24], [28], [29] [2019-01-18 17:46:38,676 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:46:38,676 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:46:38,678 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:46:38,678 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 17:46:38,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:46:38,678 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:46:38,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:46:38,679 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:46:38,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:46:38,688 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:46:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:46:38,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:46:38,715 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 21 treesize of output 24 [2019-01-18 17:46:38,718 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 24 treesize of output 30 [2019-01-18 17:46:38,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,722 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 26 treesize of output 40 [2019-01-18 17:46:38,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:46:38,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,736 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 30 treesize of output 72 [2019-01-18 17:46:38,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,746 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:46:38,746 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:46:38,785 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:38,808 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:38,825 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:38,838 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:38,851 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:38,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,885 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 68 treesize of output 71 [2019-01-18 17:46:38,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,922 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 58 treesize of output 67 [2019-01-18 17:46:38,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:38,967 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 46 treesize of output 72 [2019-01-18 17:46:39,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,023 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 37 treesize of output 80 [2019-01-18 17:46:39,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,090 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:46:39,091 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:46:39,116 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:39,140 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:39,165 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:39,190 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:46:39,233 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:46:39,233 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-18 17:46:39,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:46:39,277 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:46:39,320 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:46:39,320 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-18 17:46:39,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,386 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:46:39,386 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-01-18 17:46:39,387 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:46:39,431 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:46:39,432 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:59 [2019-01-18 17:46:39,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-18 17:46:39,474 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:46:39,520 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:46:39,520 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:69, output treesize:47 [2019-01-18 17:46:39,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:46:39,563 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:46:39,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-18 17:46:39,564 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:46:39,613 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. [2019-01-18 17:46:39,613 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:49 [2019-01-18 17:46:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:46:39,650 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:46:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:46:39,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:46:39,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-18 17:46:39,731 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:46:39,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-18 17:46:39,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-18 17:46:39,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:46:39,732 INFO L87 Difference]: Start difference. First operand 13023 states and 92401 transitions. Second operand 12 states. [2019-01-18 17:46:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:46:53,517 INFO L93 Difference]: Finished difference Result 13278 states and 93926 transitions. [2019-01-18 17:46:53,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:46:53,518 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-01-18 17:46:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:46:53,560 INFO L225 Difference]: With dead ends: 13278 [2019-01-18 17:46:53,560 INFO L226 Difference]: Without dead ends: 13277 [2019-01-18 17:46:53,562 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2019-01-18 17:46:53,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13277 states. [2019-01-18 17:47:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13277 to 13233. [2019-01-18 17:47:06,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13233 states. [2019-01-18 17:47:06,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13233 states to 13233 states and 93871 transitions. [2019-01-18 17:47:06,556 INFO L78 Accepts]: Start accepts. Automaton has 13233 states and 93871 transitions. Word has length 7 [2019-01-18 17:47:06,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:47:06,556 INFO L480 AbstractCegarLoop]: Abstraction has 13233 states and 93871 transitions. [2019-01-18 17:47:06,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-18 17:47:06,556 INFO L276 IsEmpty]: Start isEmpty. Operand 13233 states and 93871 transitions. [2019-01-18 17:47:06,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:47:06,566 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:47:06,567 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:47:06,567 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:47:06,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:47:06,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1935214964, now seen corresponding path program 1 times [2019-01-18 17:47:06,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:47:06,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:47:06,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:47:06,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:47:06,568 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:47:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:47:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:47:06,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:47:06,705 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:47:06,705 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:47:06,706 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [14], [22], [28], [29] [2019-01-18 17:47:06,706 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:47:06,706 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:47:06,707 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:47:06,708 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 4 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-18 17:47:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:47:06,708 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:47:06,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:47:06,708 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:47:06,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:47:06,718 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:47:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:47:06,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:47:06,745 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 21 treesize of output 24 [2019-01-18 17:47:06,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:47:06,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:06,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:06,752 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 26 treesize of output 40 [2019-01-18 17:47:06,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:06,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:06,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:06,760 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 28 treesize of output 54 [2019-01-18 17:47:06,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:06,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:06,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:06,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:06,768 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 30 treesize of output 72 [2019-01-18 17:47:06,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:47:06,776 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:06,804 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:06,825 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:06,842 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:06,856 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:06,868 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:06,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:06,897 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 48 treesize of output 54 [2019-01-18 17:47:06,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:06,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:06,929 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 41 treesize of output 53 [2019-01-18 17:47:06,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:06,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:06,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:06,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:06,967 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 32 treesize of output 61 [2019-01-18 17:47:07,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:47:07,014 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:07,030 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:07,045 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:07,059 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:07,090 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:47:07,091 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 17:47:07,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,145 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:47:07,145 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:07,173 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:47:07,174 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2019-01-18 17:47:07,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,206 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:47:07,206 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-18 17:47:07,207 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:07,236 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:47:07,236 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:42 [2019-01-18 17:47:07,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-01-18 17:47:07,268 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:07,300 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:47:07,300 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:34 [2019-01-18 17:47:07,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:07,334 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:47:07,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2019-01-18 17:47:07,335 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:07,368 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:47:07,368 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:40 [2019-01-18 17:47:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:47:07,396 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:47:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:47:07,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:47:07,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2019-01-18 17:47:07,472 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:47:07,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-01-18 17:47:07,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-01-18 17:47:07,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:47:07,473 INFO L87 Difference]: Start difference. First operand 13233 states and 93871 transitions. Second operand 13 states. [2019-01-18 17:47:23,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:47:23,418 INFO L93 Difference]: Finished difference Result 17581 states and 124519 transitions. [2019-01-18 17:47:23,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-18 17:47:23,418 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2019-01-18 17:47:23,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:47:23,479 INFO L225 Difference]: With dead ends: 17581 [2019-01-18 17:47:23,479 INFO L226 Difference]: Without dead ends: 17580 [2019-01-18 17:47:23,483 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2019-01-18 17:47:23,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17580 states. [2019-01-18 17:47:33,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17580 to 9927. [2019-01-18 17:47:33,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9927 states. [2019-01-18 17:47:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9927 states to 9927 states and 70376 transitions. [2019-01-18 17:47:33,846 INFO L78 Accepts]: Start accepts. Automaton has 9927 states and 70376 transitions. Word has length 7 [2019-01-18 17:47:33,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:47:33,846 INFO L480 AbstractCegarLoop]: Abstraction has 9927 states and 70376 transitions. [2019-01-18 17:47:33,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-01-18 17:47:33,846 INFO L276 IsEmpty]: Start isEmpty. Operand 9927 states and 70376 transitions. [2019-01-18 17:47:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:47:33,854 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:47:33,854 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:47:33,854 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:47:33,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:47:33,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1935766706, now seen corresponding path program 1 times [2019-01-18 17:47:33,854 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:47:33,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:47:33,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:47:33,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:47:33,855 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:47:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:47:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:47:33,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:47:33,908 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:47:33,909 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:47:33,909 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [28], [30], [32], [33] [2019-01-18 17:47:33,909 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:47:33,909 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:47:33,910 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:47:33,910 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:47:33,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:47:33,911 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:47:33,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:47:33,911 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:47:33,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:47:33,921 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:47:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:47:33,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:47:33,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:47:33,937 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 24 treesize of output 26 [2019-01-18 17:47:33,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:33,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:33,941 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 26 treesize of output 36 [2019-01-18 17:47:33,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:33,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:33,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:33,949 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 28 treesize of output 50 [2019-01-18 17:47:33,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:33,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:33,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:33,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:33,960 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 30 treesize of output 68 [2019-01-18 17:47:33,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:33,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:33,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:33,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:33,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:33,970 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:47:33,971 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:34,009 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:34,029 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:34,045 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:34,058 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:34,071 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:34,098 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 63 treesize of output 56 [2019-01-18 17:47:34,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2019-01-18 17:47:34,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,155 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 46 treesize of output 68 [2019-01-18 17:47:34,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,204 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 37 treesize of output 76 [2019-01-18 17:47:34,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,270 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:47:34,270 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:34,293 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:34,316 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:34,339 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:34,365 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:34,406 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:47:34,406 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-18 17:47:34,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,440 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:47:34,441 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:47:34,581 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-18 17:47:34,581 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:138 [2019-01-18 17:47:34,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:34,630 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:47:34,630 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-18 17:47:34,630 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:34,660 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:47:34,661 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:42 [2019-01-18 17:47:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:47:34,682 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:47:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:47:34,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:47:34,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:47:34,720 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:47:34,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:47:34,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:47:34,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:47:34,721 INFO L87 Difference]: Start difference. First operand 9927 states and 70376 transitions. Second operand 8 states. [2019-01-18 17:47:45,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:47:45,043 INFO L93 Difference]: Finished difference Result 9947 states and 70395 transitions. [2019-01-18 17:47:45,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:47:45,044 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-01-18 17:47:45,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:47:45,076 INFO L225 Difference]: With dead ends: 9947 [2019-01-18 17:47:45,077 INFO L226 Difference]: Without dead ends: 9946 [2019-01-18 17:47:45,079 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:47:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9946 states. [2019-01-18 17:47:55,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9946 to 9927. [2019-01-18 17:47:55,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9927 states. [2019-01-18 17:47:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9927 states to 9927 states and 70376 transitions. [2019-01-18 17:47:55,242 INFO L78 Accepts]: Start accepts. Automaton has 9927 states and 70376 transitions. Word has length 7 [2019-01-18 17:47:55,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:47:55,243 INFO L480 AbstractCegarLoop]: Abstraction has 9927 states and 70376 transitions. [2019-01-18 17:47:55,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:47:55,243 INFO L276 IsEmpty]: Start isEmpty. Operand 9927 states and 70376 transitions. [2019-01-18 17:47:55,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:47:55,251 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:47:55,251 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-01-18 17:47:55,251 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:47:55,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:47:55,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1937303618, now seen corresponding path program 3 times [2019-01-18 17:47:55,251 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:47:55,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:47:55,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:47:55,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:47:55,252 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:47:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:47:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:47:55,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:47:55,307 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:47:55,307 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:47:55,307 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:47:55,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:47:55,308 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:47:55,318 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-18 17:47:55,318 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-01-18 17:47:55,323 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-18 17:47:55,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:47:55,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:47:55,345 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 21 treesize of output 24 [2019-01-18 17:47:55,348 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 24 treesize of output 30 [2019-01-18 17:47:55,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,353 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 26 treesize of output 40 [2019-01-18 17:47:55,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,359 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 28 treesize of output 54 [2019-01-18 17:47:55,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,368 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 30 treesize of output 72 [2019-01-18 17:47:55,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2019-01-18 17:47:55,378 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:55,406 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:55,428 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:55,445 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:55,458 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:55,469 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:55,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2019-01-18 17:47:55,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,526 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 41 treesize of output 53 [2019-01-18 17:47:55,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,564 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 32 treesize of output 61 [2019-01-18 17:47:55,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-18 17:47:55,611 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:55,627 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:55,641 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:55,657 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:47:55,688 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:47:55,688 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2019-01-18 17:47:55,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:55,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2019-01-18 17:47:55,792 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:47:55,894 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2019-01-18 17:47:55,894 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:81, output treesize:109 [2019-01-18 17:47:56,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,005 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:47:56,006 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 72 [2019-01-18 17:47:56,006 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:56,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 107 [2019-01-18 17:47:56,122 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 16 xjuncts. [2019-01-18 17:47:56,424 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 13 dim-0 vars, and 6 xjuncts. [2019-01-18 17:47:56,425 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:126, output treesize:280 [2019-01-18 17:47:56,567 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 92 [2019-01-18 17:47:56,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,582 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:47:56,582 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 93 [2019-01-18 17:47:56,583 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:56,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-01-18 17:47:56,729 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:56,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,866 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:47:56,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 113 [2019-01-18 17:47:56,868 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:56,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:56,991 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 66 [2019-01-18 17:47:56,991 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:57,069 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2019-01-18 17:47:57,069 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:227, output treesize:161 [2019-01-18 17:47:57,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,154 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 78 [2019-01-18 17:47:57,154 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:57,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2019-01-18 17:47:57,277 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:57,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 108 [2019-01-18 17:47:57,403 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:57,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 100 [2019-01-18 17:47:57,530 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:57,630 INFO L267 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: 12 dim-0 vars, and 4 xjuncts. [2019-01-18 17:47:57,630 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:209, output treesize:153 [2019-01-18 17:47:57,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,740 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:47:57,740 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 123 [2019-01-18 17:47:57,741 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:57,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 118 [2019-01-18 17:47:57,874 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:57,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:57,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:58,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:58,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:58,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:58,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:58,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:58,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:58,005 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:47:58,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:58,007 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 125 [2019-01-18 17:47:58,008 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:58,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:58,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:58,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:58,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:58,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:58,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:58,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:47:58,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 88 [2019-01-18 17:47:58,125 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:47:58,203 INFO L267 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 4 dim-1 vars, End of recursive call: 16 dim-0 vars, and 4 xjuncts. [2019-01-18 17:47:58,204 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 20 variables, input treesize:201, output treesize:141 [2019-01-18 17:47:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:47:58,300 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:47:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:47:58,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:47:58,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2019-01-18 17:47:58,462 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:47:58,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-01-18 17:47:58,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-01-18 17:47:58,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2019-01-18 17:47:58,462 INFO L87 Difference]: Start difference. First operand 9927 states and 70376 transitions. Second operand 13 states. [2019-01-18 17:47:58,652 WARN L181 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2019-01-18 17:47:58,916 WARN L181 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2019-01-18 17:47:59,208 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2019-01-18 17:48:00,368 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2019-01-18 17:48:01,940 WARN L181 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 88 [2019-01-18 17:48:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:48:13,664 INFO L93 Difference]: Finished difference Result 12394 states and 87417 transitions. [2019-01-18 17:48:13,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-01-18 17:48:13,665 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2019-01-18 17:48:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:48:13,706 INFO L225 Difference]: With dead ends: 12394 [2019-01-18 17:48:13,707 INFO L226 Difference]: Without dead ends: 12392 [2019-01-18 17:48:13,709 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-01-18 17:48:13,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12392 states. [2019-01-18 17:48:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12392 to 7195. [2019-01-18 17:48:22,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7195 states. [2019-01-18 17:48:22,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7195 states to 7195 states and 51194 transitions. [2019-01-18 17:48:22,613 INFO L78 Accepts]: Start accepts. Automaton has 7195 states and 51194 transitions. Word has length 7 [2019-01-18 17:48:22,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:48:22,613 INFO L480 AbstractCegarLoop]: Abstraction has 7195 states and 51194 transitions. [2019-01-18 17:48:22,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-01-18 17:48:22,614 INFO L276 IsEmpty]: Start isEmpty. Operand 7195 states and 51194 transitions. [2019-01-18 17:48:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:48:22,619 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:48:22,619 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:48:22,620 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:48:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:48:22,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1937075524, now seen corresponding path program 1 times [2019-01-18 17:48:22,620 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:48:22,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:48:22,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:48:22,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:48:22,621 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:48:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:48:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:48:22,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:48:22,690 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:48:22,690 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:48:22,690 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [24], [28], [30], [31] [2019-01-18 17:48:22,691 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:48:22,691 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:48:22,693 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:48:22,693 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:48:22,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:48:22,693 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:48:22,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:48:22,693 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:48:22,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:48:22,705 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:48:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:48:22,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:48:22,713 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:48:22,717 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 24 treesize of output 26 [2019-01-18 17:48:22,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,723 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 26 treesize of output 36 [2019-01-18 17:48:22,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,730 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 28 treesize of output 50 [2019-01-18 17:48:22,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,740 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 17:48:22,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:48:22,751 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:48:22,788 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:22,807 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:22,823 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:22,836 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:22,849 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:22,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2019-01-18 17:48:22,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,895 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 53 treesize of output 63 [2019-01-18 17:48:22,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,934 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 46 treesize of output 68 [2019-01-18 17:48:22,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:22,986 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 37 treesize of output 76 [2019-01-18 17:48:23,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:48:23,052 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:48:23,075 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:23,098 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:23,121 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:23,146 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:23,186 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:48:23,187 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-18 17:48:23,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,229 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:48:23,230 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:48:23,369 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-18 17:48:23,369 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:138 [2019-01-18 17:48:23,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,471 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 90 [2019-01-18 17:48:23,472 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:48:23,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 127 [2019-01-18 17:48:23,559 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:48:23,638 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 2 xjuncts. [2019-01-18 17:48:23,638 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:150, output treesize:94 [2019-01-18 17:48:23,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,687 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:48:23,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,689 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2019-01-18 17:48:23,689 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:48:23,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,773 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:48:23,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:23,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 138 [2019-01-18 17:48:23,775 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 17:48:23,859 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2019-01-18 17:48:23,859 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:118, output treesize:100 [2019-01-18 17:48:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:48:23,931 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:48:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:48:23,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:48:23,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:48:23,985 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:48:23,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:48:23,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:48:23,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:48:23,986 INFO L87 Difference]: Start difference. First operand 7195 states and 51194 transitions. Second operand 10 states. [2019-01-18 17:48:25,532 WARN L181 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2019-01-18 17:48:27,067 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2019-01-18 17:48:34,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:48:34,984 INFO L93 Difference]: Finished difference Result 7367 states and 52064 transitions. [2019-01-18 17:48:34,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 17:48:34,985 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-18 17:48:34,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:48:35,007 INFO L225 Difference]: With dead ends: 7367 [2019-01-18 17:48:35,007 INFO L226 Difference]: Without dead ends: 7366 [2019-01-18 17:48:35,008 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:48:35,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7366 states. [2019-01-18 17:48:44,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7366 to 7259. [2019-01-18 17:48:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7259 states. [2019-01-18 17:48:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7259 states to 7259 states and 51642 transitions. [2019-01-18 17:48:44,397 INFO L78 Accepts]: Start accepts. Automaton has 7259 states and 51642 transitions. Word has length 7 [2019-01-18 17:48:44,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:48:44,398 INFO L480 AbstractCegarLoop]: Abstraction has 7259 states and 51642 transitions. [2019-01-18 17:48:44,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:48:44,398 INFO L276 IsEmpty]: Start isEmpty. Operand 7259 states and 51642 transitions. [2019-01-18 17:48:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:48:44,404 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:48:44,404 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:48:44,404 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:48:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:48:44,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1924490204, now seen corresponding path program 2 times [2019-01-18 17:48:44,404 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:48:44,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:48:44,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:48:44,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:48:44,405 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:48:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:48:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:48:44,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:48:44,548 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:48:44,548 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-18 17:48:44,548 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-18 17:48:44,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:48:44,548 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:48:44,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-18 17:48:44,556 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-18 17:48:44,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-18 17:48:44,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-18 17:48:44,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:48:44,582 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 21 treesize of output 24 [2019-01-18 17:48:44,584 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 24 treesize of output 30 [2019-01-18 17:48:44,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,589 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 26 treesize of output 40 [2019-01-18 17:48:44,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,594 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 28 treesize of output 54 [2019-01-18 17:48:44,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,602 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 30 treesize of output 72 [2019-01-18 17:48:44,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,610 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:48:44,610 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:48:44,651 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:44,672 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:44,690 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:44,703 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:44,716 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:44,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,749 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 68 treesize of output 71 [2019-01-18 17:48:44,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,786 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 58 treesize of output 67 [2019-01-18 17:48:44,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,829 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 46 treesize of output 72 [2019-01-18 17:48:44,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,885 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 37 treesize of output 80 [2019-01-18 17:48:44,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:44,955 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:48:44,955 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:48:44,980 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:45,005 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:45,030 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:45,055 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:48:45,099 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:48:45,099 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2019-01-18 17:48:45,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,187 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:48:45,188 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:48:45,232 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:48:45,233 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-18 17:48:45,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-18 17:48:45,269 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:48:45,317 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:48:45,318 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-18 17:48:45,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,358 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:48:45,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-18 17:48:45,360 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:48:45,407 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:48:45,407 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2019-01-18 17:48:45,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:48:45,447 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:48:45,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-18 17:48:45,448 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:48:45,495 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. [2019-01-18 17:48:45,495 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:49 [2019-01-18 17:48:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:48:45,518 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:48:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:48:45,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:48:45,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2019-01-18 17:48:45,583 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:48:45,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-18 17:48:45,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-18 17:48:45,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2019-01-18 17:48:45,584 INFO L87 Difference]: Start difference. First operand 7259 states and 51642 transitions. Second operand 11 states. [2019-01-18 17:49:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:49:00,954 INFO L93 Difference]: Finished difference Result 9936 states and 70364 transitions. [2019-01-18 17:49:00,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-18 17:49:00,954 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2019-01-18 17:49:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:49:00,984 INFO L225 Difference]: With dead ends: 9936 [2019-01-18 17:49:00,985 INFO L226 Difference]: Without dead ends: 9935 [2019-01-18 17:49:00,986 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2019-01-18 17:49:00,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9935 states. [2019-01-18 17:49:14,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9935 to 8951. [2019-01-18 17:49:14,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8951 states. [2019-01-18 17:49:14,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8951 states to 8951 states and 63743 transitions. [2019-01-18 17:49:14,487 INFO L78 Accepts]: Start accepts. Automaton has 8951 states and 63743 transitions. Word has length 7 [2019-01-18 17:49:14,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:49:14,487 INFO L480 AbstractCegarLoop]: Abstraction has 8951 states and 63743 transitions. [2019-01-18 17:49:14,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-18 17:49:14,487 INFO L276 IsEmpty]: Start isEmpty. Operand 8951 states and 63743 transitions. [2019-01-18 17:49:14,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:49:14,494 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:49:14,495 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:49:14,495 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:49:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:49:14,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1928257388, now seen corresponding path program 1 times [2019-01-18 17:49:14,495 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:49:14,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:49:14,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-18 17:49:14,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:49:14,496 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:49:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:49:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:49:14,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:49:14,589 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:49:14,589 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:49:14,589 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [24], [28], [30], [31] [2019-01-18 17:49:14,590 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:49:14,590 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:49:14,591 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:49:14,591 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:49:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:49:14,592 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:49:14,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:49:14,592 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:49:14,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:49:14,600 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:49:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:49:14,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:49:14,609 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 63 treesize of output 56 [2019-01-18 17:49:14,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,628 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 53 treesize of output 63 [2019-01-18 17:49:14,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,669 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2019-01-18 17:49:14,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,720 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 37 treesize of output 76 [2019-01-18 17:49:14,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:14,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:49:14,787 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:49:14,813 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:14,836 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:14,860 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:14,886 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:14,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:49:14,921 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-18 17:49:14,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 17:49:14,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 17:49:14,932 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 17:49:14,935 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:49:14,935 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:49:14,968 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:14,986 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:15,000 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:15,010 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:15,021 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:15,062 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:49:15,063 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-18 17:49:15,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:15,103 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:49:15,104 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:49:15,242 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-18 17:49:15,242 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:138 [2019-01-18 17:49:15,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:15,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:15,288 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:49:15,289 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2019-01-18 17:49:15,289 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:49:15,318 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:49:15,319 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:42 [2019-01-18 17:49:15,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:15,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:15,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:15,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:15,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:15,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:15,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:15,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:15,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:15,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2019-01-18 17:49:15,347 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:49:15,378 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:49:15,379 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:34 [2019-01-18 17:49:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:49:15,400 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:49:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:49:15,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:49:15,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-18 17:49:15,445 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:49:15,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:49:15,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:49:15,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:49:15,446 INFO L87 Difference]: Start difference. First operand 8951 states and 63743 transitions. Second operand 10 states. [2019-01-18 17:49:29,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:49:29,657 INFO L93 Difference]: Finished difference Result 9235 states and 65371 transitions. [2019-01-18 17:49:29,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-18 17:49:29,657 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-18 17:49:29,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:49:29,687 INFO L225 Difference]: With dead ends: 9235 [2019-01-18 17:49:29,687 INFO L226 Difference]: Without dead ends: 9232 [2019-01-18 17:49:29,689 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-01-18 17:49:29,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9232 states. [2019-01-18 17:49:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9232 to 9044. [2019-01-18 17:49:44,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9044 states. [2019-01-18 17:49:44,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9044 states to 9044 states and 64394 transitions. [2019-01-18 17:49:44,061 INFO L78 Accepts]: Start accepts. Automaton has 9044 states and 64394 transitions. Word has length 7 [2019-01-18 17:49:44,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:49:44,062 INFO L480 AbstractCegarLoop]: Abstraction has 9044 states and 64394 transitions. [2019-01-18 17:49:44,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:49:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand 9044 states and 64394 transitions. [2019-01-18 17:49:44,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:49:44,069 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:49:44,069 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:49:44,069 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:49:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:49:44,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1928378538, now seen corresponding path program 1 times [2019-01-18 17:49:44,069 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:49:44,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:49:44,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:49:44,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:49:44,070 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:49:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:49:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-18 17:49:44,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:49:44,135 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:49:44,135 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:49:44,135 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [28], [30], [32], [33] [2019-01-18 17:49:44,136 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:49:44,136 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:49:44,138 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:49:44,138 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:49:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:49:44,138 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:49:44,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:49:44,138 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:49:44,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:49:44,148 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:49:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:49:44,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:49:44,170 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 43 treesize of output 39 [2019-01-18 17:49:44,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,193 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 36 treesize of output 49 [2019-01-18 17:49:44,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,228 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 32 treesize of output 57 [2019-01-18 17:49:44,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:49:44,271 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-18 17:49:44,286 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:44,299 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:44,315 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:44,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:49:44,339 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 24 treesize of output 26 [2019-01-18 17:49:44,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 17:49:44,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 17:49:44,348 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 30 treesize of output 68 [2019-01-18 17:49:44,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:49:44,357 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:49:44,381 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:44,398 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:44,412 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:44,423 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:44,434 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:49:44,462 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:49:44,463 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-18 17:49:44,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,511 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2019-01-18 17:49:44,511 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:49:44,599 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-18 17:49:44,599 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:88 [2019-01-18 17:49:44,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:49:44,643 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:49:44,644 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 59 [2019-01-18 17:49:44,644 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:49:44,664 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:49:44,664 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:29 [2019-01-18 17:49:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:49:44,681 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:49:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:49:44,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:49:44,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:49:44,720 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:49:44,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:49:44,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:49:44,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:49:44,721 INFO L87 Difference]: Start difference. First operand 9044 states and 64394 transitions. Second operand 8 states. [2019-01-18 17:49:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:49:58,399 INFO L93 Difference]: Finished difference Result 9065 states and 64420 transitions. [2019-01-18 17:49:58,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:49:58,399 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-01-18 17:49:58,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:49:58,429 INFO L225 Difference]: With dead ends: 9065 [2019-01-18 17:49:58,429 INFO L226 Difference]: Without dead ends: 9064 [2019-01-18 17:49:58,431 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:49:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9064 states. [2019-01-18 17:50:12,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9064 to 9045. [2019-01-18 17:50:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9045 states. [2019-01-18 17:50:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9045 states to 9045 states and 64401 transitions. [2019-01-18 17:50:12,568 INFO L78 Accepts]: Start accepts. Automaton has 9045 states and 64401 transitions. Word has length 7 [2019-01-18 17:50:12,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:50:12,568 INFO L480 AbstractCegarLoop]: Abstraction has 9045 states and 64401 transitions. [2019-01-18 17:50:12,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:50:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand 9045 states and 64401 transitions. [2019-01-18 17:50:12,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:50:12,575 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:50:12,575 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:50:12,575 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:50:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:50:12,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1904967206, now seen corresponding path program 1 times [2019-01-18 17:50:12,576 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:50:12,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:50:12,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:50:12,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:50:12,576 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:50:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:50:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:50:12,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:50:12,649 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:50:12,649 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:50:12,649 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [24], [27] [2019-01-18 17:50:12,650 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:50:12,651 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:50:12,652 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:50:12,653 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 5 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-18 17:50:12,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:50:12,653 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:50:12,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:50:12,653 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:50:12,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:50:12,662 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:50:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:50:12,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:50:12,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,692 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 68 treesize of output 71 [2019-01-18 17:50:12,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,730 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 58 treesize of output 67 [2019-01-18 17:50:12,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,777 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 46 treesize of output 72 [2019-01-18 17:50:12,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,834 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 37 treesize of output 80 [2019-01-18 17:50:12,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:12,905 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:50:12,905 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:50:12,935 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:12,964 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:12,992 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:13,023 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:13,063 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 21 treesize of output 24 [2019-01-18 17:50:13,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:50:13,070 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:50:13,071 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:50:13,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:50:13,077 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:50:13,077 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:50:13,111 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:13,130 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:13,145 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:13,158 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:13,169 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:13,212 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:13,212 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:92, output treesize:91 [2019-01-18 17:50:13,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,264 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:50:13,264 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:50:13,307 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:50:13,307 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:101, output treesize:71 [2019-01-18 17:50:13,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-18 17:50:13,358 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:50:13,400 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:50:13,401 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:81, output treesize:55 [2019-01-18 17:50:13,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,495 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:50:13,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-18 17:50:13,498 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:50:13,545 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:50:13,546 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:47 [2019-01-18 17:50:13,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,589 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:50:13,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2019-01-18 17:50:13,591 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:50:13,640 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:50:13,640 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:61, output treesize:49 [2019-01-18 17:50:13,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:13,686 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:50:13,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 127 [2019-01-18 17:50:13,687 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:50:13,734 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. [2019-01-18 17:50:13,735 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:53 [2019-01-18 17:50:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:50:13,760 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:50:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:50:13,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:50:13,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2019-01-18 17:50:13,871 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:50:13,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-01-18 17:50:13,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-01-18 17:50:13,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2019-01-18 17:50:13,871 INFO L87 Difference]: Start difference. First operand 9045 states and 64401 transitions. Second operand 14 states. [2019-01-18 17:50:31,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:50:31,229 INFO L93 Difference]: Finished difference Result 9411 states and 66754 transitions. [2019-01-18 17:50:31,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-18 17:50:31,229 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2019-01-18 17:50:31,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:50:31,260 INFO L225 Difference]: With dead ends: 9411 [2019-01-18 17:50:31,261 INFO L226 Difference]: Without dead ends: 9409 [2019-01-18 17:50:31,263 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2019-01-18 17:50:31,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9409 states. [2019-01-18 17:50:45,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9409 to 8693. [2019-01-18 17:50:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8693 states. [2019-01-18 17:50:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8693 states to 8693 states and 61400 transitions. [2019-01-18 17:50:45,258 INFO L78 Accepts]: Start accepts. Automaton has 8693 states and 61400 transitions. Word has length 7 [2019-01-18 17:50:45,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:50:45,258 INFO L480 AbstractCegarLoop]: Abstraction has 8693 states and 61400 transitions. [2019-01-18 17:50:45,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-01-18 17:50:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 8693 states and 61400 transitions. [2019-01-18 17:50:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:50:45,266 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:50:45,266 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:50:45,267 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:50:45,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:50:45,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1916458534, now seen corresponding path program 1 times [2019-01-18 17:50:45,267 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:50:45,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:50:45,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:50:45,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:50:45,268 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:50:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:50:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:50:45,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:50:45,409 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:50:45,409 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:50:45,409 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [22], [24], [27] [2019-01-18 17:50:45,410 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:50:45,410 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:50:45,412 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:50:45,412 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 5 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-18 17:50:45,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:50:45,412 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:50:45,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:50:45,413 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:50:45,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:50:45,428 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:50:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:50:45,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:50:45,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,460 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 68 treesize of output 71 [2019-01-18 17:50:45,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,499 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 58 treesize of output 67 [2019-01-18 17:50:45,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,543 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 46 treesize of output 72 [2019-01-18 17:50:45,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,596 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 37 treesize of output 80 [2019-01-18 17:50:45,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,666 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-18 17:50:45,666 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:50:45,691 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:45,716 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:45,742 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:45,768 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:45,801 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 21 treesize of output 24 [2019-01-18 17:50:45,804 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2019-01-18 17:50:45,807 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2019-01-18 17:50:45,810 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2019-01-18 17:50:45,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2019-01-18 17:50:45,814 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2019-01-18 17:50:45,814 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:50:45,847 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:45,866 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:45,882 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:45,894 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:45,905 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:50:45,949 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:50:45,949 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2019-01-18 17:50:45,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:45,996 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-18 17:50:45,996 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:50:46,038 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:50:46,039 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-18 17:50:46,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,086 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:50:46,087 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-01-18 17:50:46,087 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:50:46,131 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:50:46,131 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:81, output treesize:59 [2019-01-18 17:50:46,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,174 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-18 17:50:46,174 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:50:46,221 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:50:46,221 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:69, output treesize:47 [2019-01-18 17:50:46,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,264 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:50:46,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 124 [2019-01-18 17:50:46,265 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:50:46,314 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:50:46,314 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:45 [2019-01-18 17:50:46,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,356 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:50:46,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:50:46,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 120 [2019-01-18 17:50:46,358 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:50:46,405 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. [2019-01-18 17:50:46,405 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:57, output treesize:49 [2019-01-18 17:50:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:50:46,435 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:50:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:50:46,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:50:46,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2019-01-18 17:50:46,533 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:50:46,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-01-18 17:50:46,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-01-18 17:50:46,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2019-01-18 17:50:46,533 INFO L87 Difference]: Start difference. First operand 8693 states and 61400 transitions. Second operand 14 states. [2019-01-18 17:51:01,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:51:01,911 INFO L93 Difference]: Finished difference Result 8797 states and 61626 transitions. [2019-01-18 17:51:01,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-18 17:51:01,912 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2019-01-18 17:51:01,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:51:01,937 INFO L225 Difference]: With dead ends: 8797 [2019-01-18 17:51:01,937 INFO L226 Difference]: Without dead ends: 8791 [2019-01-18 17:51:01,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2019-01-18 17:51:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8791 states. [2019-01-18 17:51:09,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8791 to 1900. [2019-01-18 17:51:09,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1900 states. [2019-01-18 17:51:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 13072 transitions. [2019-01-18 17:51:09,804 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 13072 transitions. Word has length 7 [2019-01-18 17:51:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:51:09,804 INFO L480 AbstractCegarLoop]: Abstraction has 1900 states and 13072 transitions. [2019-01-18 17:51:09,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-01-18 17:51:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 13072 transitions. [2019-01-18 17:51:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:51:09,807 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:51:09,807 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:51:09,807 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:51:09,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:51:09,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1899825356, now seen corresponding path program 1 times [2019-01-18 17:51:09,808 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:51:09,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:51:09,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:51:09,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:51:09,808 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:51:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:51:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:51:09,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:51:09,879 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:51:09,879 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:51:09,879 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [24], [28], [30], [31] [2019-01-18 17:51:09,880 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:51:09,880 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:51:09,881 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:51:09,881 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:51:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:51:09,882 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:51:09,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:51:09,882 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:51:09,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:51:09,891 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:51:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:51:09,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:51:09,899 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 63 treesize of output 56 [2019-01-18 17:51:09,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:09,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:09,918 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 53 treesize of output 63 [2019-01-18 17:51:09,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:09,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:09,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:09,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:09,955 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 46 treesize of output 68 [2019-01-18 17:51:09,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:09,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,005 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 37 treesize of output 76 [2019-01-18 17:51:10,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,071 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:51:10,071 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-18 17:51:10,094 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:10,117 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:10,141 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:10,167 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:10,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2019-01-18 17:51:10,204 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-18 17:51:10,207 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2019-01-18 17:51:10,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2019-01-18 17:51:10,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 17:51:10,220 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:51:10,220 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:51:10,252 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:10,270 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:10,283 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:10,295 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:10,306 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:10,347 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:51:10,347 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2019-01-18 17:51:10,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,380 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-18 17:51:10,381 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:51:10,422 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:51:10,422 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2019-01-18 17:51:10,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 107 [2019-01-18 17:51:10,458 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:51:10,500 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:51:10,501 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:51 [2019-01-18 17:51:10,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:10,539 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:51:10,548 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 134 [2019-01-18 17:51:10,549 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:51:10,706 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2019-01-18 17:51:10,706 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:90 [2019-01-18 17:51:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:51:10,749 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:51:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:51:10,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:51:10,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-18 17:51:10,805 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:51:10,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-18 17:51:10,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-18 17:51:10,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-18 17:51:10,805 INFO L87 Difference]: Start difference. First operand 1900 states and 13072 transitions. Second operand 10 states. [2019-01-18 17:51:20,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:51:20,633 INFO L93 Difference]: Finished difference Result 1963 states and 13288 transitions. [2019-01-18 17:51:20,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 17:51:20,634 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-18 17:51:20,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:51:20,639 INFO L225 Difference]: With dead ends: 1963 [2019-01-18 17:51:20,639 INFO L226 Difference]: Without dead ends: 1962 [2019-01-18 17:51:20,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-18 17:51:20,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2019-01-18 17:51:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1925. [2019-01-18 17:51:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1925 states. [2019-01-18 17:51:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 13247 transitions. [2019-01-18 17:51:28,585 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 13247 transitions. Word has length 7 [2019-01-18 17:51:28,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:51:28,585 INFO L480 AbstractCegarLoop]: Abstraction has 1925 states and 13247 transitions. [2019-01-18 17:51:28,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-18 17:51:28,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 13247 transitions. [2019-01-18 17:51:28,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:51:28,589 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:51:28,589 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:51:28,589 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:51:28,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:51:28,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1912516322, now seen corresponding path program 1 times [2019-01-18 17:51:28,590 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:51:28,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:51:28,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:51:28,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:51:28,591 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:51:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:51:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:51:28,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:51:28,705 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:51:28,705 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:51:28,705 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [28], [30], [31] [2019-01-18 17:51:28,706 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:51:28,706 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:51:28,707 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:51:28,708 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-18 17:51:28,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:51:28,708 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:51:28,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:51:28,708 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:51:28,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:51:28,718 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:51:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:51:28,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:51:28,726 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 21 treesize of output 24 [2019-01-18 17:51:28,729 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 24 treesize of output 26 [2019-01-18 17:51:28,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,735 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 26 treesize of output 36 [2019-01-18 17:51:28,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,742 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 28 treesize of output 50 [2019-01-18 17:51:28,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,751 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 30 treesize of output 68 [2019-01-18 17:51:28,760 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:51:28,761 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:51:28,787 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:28,807 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:28,823 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:28,835 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:28,847 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:28,870 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 43 treesize of output 39 [2019-01-18 17:51:28,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,886 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 36 treesize of output 49 [2019-01-18 17:51:28,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,920 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 32 treesize of output 57 [2019-01-18 17:51:28,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:28,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:51:28,965 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:51:28,979 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:28,993 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:29,008 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:29,036 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:51:29,036 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:64, output treesize:67 [2019-01-18 17:51:29,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,082 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 51 [2019-01-18 17:51:29,083 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:51:29,101 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 17:51:29,101 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2019-01-18 17:51:29,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,127 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 65 [2019-01-18 17:51:29,127 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:51:29,147 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:51:29,147 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:25 [2019-01-18 17:51:29,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:29,176 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:51:29,176 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 78 [2019-01-18 17:51:29,177 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:51:29,198 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:51:29,198 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:27 [2019-01-18 17:51:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:51:29,217 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:51:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:51:29,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:51:29,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2019-01-18 17:51:29,275 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:51:29,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-18 17:51:29,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-18 17:51:29,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2019-01-18 17:51:29,276 INFO L87 Difference]: Start difference. First operand 1925 states and 13247 transitions. Second operand 11 states. [2019-01-18 17:51:37,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:51:37,101 INFO L93 Difference]: Finished difference Result 2000 states and 13456 transitions. [2019-01-18 17:51:37,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-18 17:51:37,102 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2019-01-18 17:51:37,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:51:37,107 INFO L225 Difference]: With dead ends: 2000 [2019-01-18 17:51:37,107 INFO L226 Difference]: Without dead ends: 1999 [2019-01-18 17:51:37,108 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-01-18 17:51:37,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2019-01-18 17:51:45,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1945. [2019-01-18 17:51:45,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1945 states. [2019-01-18 17:51:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 13387 transitions. [2019-01-18 17:51:45,112 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 13387 transitions. Word has length 7 [2019-01-18 17:51:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:51:45,112 INFO L480 AbstractCegarLoop]: Abstraction has 1945 states and 13387 transitions. [2019-01-18 17:51:45,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-18 17:51:45,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 13387 transitions. [2019-01-18 17:51:45,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:51:45,115 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:51:45,115 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:51:45,115 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:51:45,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:51:45,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1895531480, now seen corresponding path program 1 times [2019-01-18 17:51:45,116 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:51:45,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:51:45,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:51:45,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:51:45,116 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:51:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:51:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:51:45,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:51:45,136 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:51:45,136 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:51:45,136 INFO L207 CegarAbsIntRunner]: [0], [22], [28], [30], [32], [34], [35] [2019-01-18 17:51:45,137 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:51:45,137 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:51:45,139 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:51:45,139 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 17:51:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:51:45,140 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:51:45,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:51:45,140 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:51:45,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:51:45,148 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:51:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:51:45,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:51:45,155 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 21 treesize of output 24 [2019-01-18 17:51:45,158 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 24 treesize of output 26 [2019-01-18 17:51:45,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2019-01-18 17:51:45,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2019-01-18 17:51:45,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-18 17:51:45,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2019-01-18 17:51:45,209 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:51:45,219 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:45,230 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:45,241 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:45,251 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:45,262 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:45,273 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. [2019-01-18 17:51:45,273 INFO L202 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:21, output treesize:31 [2019-01-18 17:51:45,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:51:45,278 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2019-01-18 17:51:45,278 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:51:45,279 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:51:45,279 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:5 [2019-01-18 17:51:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:51:45,284 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:51:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:51:45,306 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-18 17:51:45,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 4 [2019-01-18 17:51:45,306 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 17:51:45,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 17:51:45,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 17:51:45,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-01-18 17:51:45,306 INFO L87 Difference]: Start difference. First operand 1945 states and 13387 transitions. Second operand 4 states. [2019-01-18 17:51:56,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:51:56,377 INFO L93 Difference]: Finished difference Result 3175 states and 21705 transitions. [2019-01-18 17:51:56,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 17:51:56,377 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-01-18 17:51:56,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:51:56,386 INFO L225 Difference]: With dead ends: 3175 [2019-01-18 17:51:56,386 INFO L226 Difference]: Without dead ends: 3170 [2019-01-18 17:51:56,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-01-18 17:51:56,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3170 states. [2019-01-18 17:52:08,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3170 to 3133. [2019-01-18 17:52:08,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3133 states. [2019-01-18 17:52:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3133 states to 3133 states and 21649 transitions. [2019-01-18 17:52:08,688 INFO L78 Accepts]: Start accepts. Automaton has 3133 states and 21649 transitions. Word has length 7 [2019-01-18 17:52:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:52:08,688 INFO L480 AbstractCegarLoop]: Abstraction has 3133 states and 21649 transitions. [2019-01-18 17:52:08,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 17:52:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3133 states and 21649 transitions. [2019-01-18 17:52:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:52:08,693 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:52:08,693 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:52:08,693 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:52:08,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:52:08,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1908522342, now seen corresponding path program 1 times [2019-01-18 17:52:08,693 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:52:08,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:52:08,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:52:08,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:52:08,694 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:52:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:52:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:52:08,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:52:08,735 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:52:08,735 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:52:08,735 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [28], [30], [32], [33] [2019-01-18 17:52:08,736 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:52:08,736 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:52:08,738 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:52:08,738 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:52:08,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:52:08,738 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:52:08,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:52:08,738 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:52:08,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:52:08,748 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:52:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:52:08,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:52:08,757 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 21 treesize of output 24 [2019-01-18 17:52:08,760 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2019-01-18 17:52:08,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,766 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 26 treesize of output 36 [2019-01-18 17:52:08,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,773 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 28 treesize of output 50 [2019-01-18 17:52:08,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,783 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 30 treesize of output 68 [2019-01-18 17:52:08,794 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2019-01-18 17:52:08,794 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:52:08,821 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:08,839 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:08,855 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:08,867 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:08,879 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:08,902 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 43 treesize of output 39 [2019-01-18 17:52:08,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,918 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 36 treesize of output 49 [2019-01-18 17:52:08,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,953 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 32 treesize of output 57 [2019-01-18 17:52:08,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:08,997 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-18 17:52:08,997 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-18 17:52:09,010 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:09,024 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:09,039 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:09,068 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:52:09,068 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2019-01-18 17:52:09,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:09,102 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 51 [2019-01-18 17:52:09,103 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:52:09,120 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-18 17:52:09,120 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:33 [2019-01-18 17:52:09,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:09,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:09,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:09,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:09,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:09,143 INFO L683 Elim1Store]: detected equality via solver [2019-01-18 17:52:09,143 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 59 [2019-01-18 17:52:09,144 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:52:09,163 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:52:09,164 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:29 [2019-01-18 17:52:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:52:09,180 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:52:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:52:09,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:52:09,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:52:09,216 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:52:09,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:52:09,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:52:09,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:52:09,216 INFO L87 Difference]: Start difference. First operand 3133 states and 21649 transitions. Second operand 8 states. [2019-01-18 17:52:20,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:52:20,611 INFO L93 Difference]: Finished difference Result 3149 states and 21664 transitions. [2019-01-18 17:52:20,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:52:20,612 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-01-18 17:52:20,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:52:20,620 INFO L225 Difference]: With dead ends: 3149 [2019-01-18 17:52:20,621 INFO L226 Difference]: Without dead ends: 3148 [2019-01-18 17:52:20,621 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:52:20,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3148 states. [2019-01-18 17:52:32,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3148 to 3133. [2019-01-18 17:52:32,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3133 states. [2019-01-18 17:52:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3133 states to 3133 states and 21649 transitions. [2019-01-18 17:52:32,929 INFO L78 Accepts]: Start accepts. Automaton has 3133 states and 21649 transitions. Word has length 7 [2019-01-18 17:52:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 17:52:32,929 INFO L480 AbstractCegarLoop]: Abstraction has 3133 states and 21649 transitions. [2019-01-18 17:52:32,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 17:52:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3133 states and 21649 transitions. [2019-01-18 17:52:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-18 17:52:32,934 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 17:52:32,934 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-18 17:52:32,934 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-01-18 17:52:32,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:52:32,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1858652208, now seen corresponding path program 1 times [2019-01-18 17:52:32,934 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 17:52:32,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:52:32,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:52:32,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 17:52:32,935 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 17:52:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:52:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:52:33,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:52:33,035 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 17:52:33,035 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-18 17:52:33,036 INFO L207 CegarAbsIntRunner]: [0], [6], [24], [28], [30], [32], [33] [2019-01-18 17:52:33,036 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 17:52:33,037 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 17:52:33,038 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 17:52:33,038 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 72 root evaluator evaluations with a maximum evaluation depth of 2. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 17:52:33,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 17:52:33,039 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 17:52:33,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 17:52:33,039 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 17:52:33,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 17:52:33,049 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 17:52:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 17:52:33,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 17:52:33,057 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 21 treesize of output 24 [2019-01-18 17:52:33,061 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 24 treesize of output 26 [2019-01-18 17:52:33,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,068 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 26 treesize of output 36 [2019-01-18 17:52:33,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,076 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 28 treesize of output 50 [2019-01-18 17:52:33,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2019-01-18 17:52:33,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,095 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2019-01-18 17:52:33,095 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-18 17:52:33,132 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:33,153 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:33,169 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:33,182 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:33,193 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:33,219 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 63 treesize of output 56 [2019-01-18 17:52:33,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,238 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 53 treesize of output 63 [2019-01-18 17:52:33,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,278 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 46 treesize of output 68 [2019-01-18 17:52:33,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,330 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 37 treesize of output 76 [2019-01-18 17:52:33,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-18 17:52:33,396 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-01-18 17:52:33,419 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:33,441 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:33,464 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:33,489 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 17:52:33,530 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-18 17:52:33,531 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2019-01-18 17:52:33,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,557 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2019-01-18 17:52:33,558 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 17:52:33,599 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-18 17:52:33,599 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2019-01-18 17:52:33,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 17:52:33,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 113 [2019-01-18 17:52:33,638 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-18 17:52:33,783 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2019-01-18 17:52:33,783 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:79, output treesize:106 [2019-01-18 17:52:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:52:33,824 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 17:52:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 17:52:33,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 17:52:33,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 17:52:33,863 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 17:52:33,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 17:52:33,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 17:52:33,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-18 17:52:33,864 INFO L87 Difference]: Start difference. First operand 3133 states and 21649 transitions. Second operand 8 states. [2019-01-18 17:52:45,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 17:52:45,305 INFO L93 Difference]: Finished difference Result 3162 states and 21676 transitions. [2019-01-18 17:52:45,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-18 17:52:45,306 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-01-18 17:52:45,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 17:52:45,314 INFO L225 Difference]: With dead ends: 3162 [2019-01-18 17:52:45,314 INFO L226 Difference]: Without dead ends: 3161 [2019-01-18 17:52:45,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-18 17:52:45,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states.