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-7-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-a9d37a5-m [2019-02-28 10:23:07,862 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-02-28 10:23:07,864 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-02-28 10:23:07,881 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-02-28 10:23:07,881 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-02-28 10:23:07,882 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-02-28 10:23:07,884 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-02-28 10:23:07,887 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-02-28 10:23:07,888 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-02-28 10:23:07,890 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-02-28 10:23:07,891 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-02-28 10:23:07,931 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-02-28 10:23:07,951 INFO L110 SettingsManager]: Loading preferences was successful [2019-02-28 10:23:07,952 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-02-28 10:23:07,952 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-02-28 10:23:07,953 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-02-28 10:23:07,953 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-02-28 10:23:07,953 INFO L133 SettingsManager]: * User list type=DISABLED [2019-02-28 10:23:07,953 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-02-28 10:23:07,953 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-02-28 10:23:07,954 INFO L133 SettingsManager]: * Explicit value domain=true [2019-02-28 10:23:07,954 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-02-28 10:23:07,954 INFO L133 SettingsManager]: * Octagon Domain=false [2019-02-28 10:23:07,954 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-02-28 10:23:07,954 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-02-28 10:23:07,955 INFO L133 SettingsManager]: * Interval Domain=false [2019-02-28 10:23:07,955 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-02-28 10:23:07,955 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-02-28 10:23:07,956 INFO L133 SettingsManager]: * Use SBE=true [2019-02-28 10:23:07,956 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-02-28 10:23:07,956 INFO L133 SettingsManager]: * sizeof long=4 [2019-02-28 10:23:07,956 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-02-28 10:23:07,956 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-02-28 10:23:07,957 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-02-28 10:23:07,957 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-02-28 10:23:07,957 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-02-28 10:23:07,957 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-02-28 10:23:07,957 INFO L133 SettingsManager]: * sizeof long double=12 [2019-02-28 10:23:07,957 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-02-28 10:23:07,958 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-02-28 10:23:07,958 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-02-28 10:23:07,958 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-02-28 10:23:07,958 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-02-28 10:23:07,958 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in -t:200000 [2019-02-28 10:23:07,959 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-02-28 10:23:07,959 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-02-28 10:23:07,959 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-02-28 10:23:07,959 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-02-28 10:23:07,959 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-02-28 10:23:07,959 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in [2019-02-28 10:23:07,960 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-02-28 10:23:07,960 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-02-28 10:23:07,993 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-02-28 10:23:08,004 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-02-28 10:23:08,008 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-02-28 10:23:08,009 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-02-28 10:23:08,010 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-02-28 10:23:08,011 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl [2019-02-28 10:23:08,011 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl' [2019-02-28 10:23:08,050 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-02-28 10:23:08,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-02-28 10:23:08,052 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-02-28 10:23:08,052 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-02-28 10:23:08,052 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-02-28 10:23:08,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:23:08" (1/1) ... [2019-02-28 10:23:08,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:23:08" (1/1) ... [2019-02-28 10:23:08,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-02-28 10:23:08,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-02-28 10:23:08,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-02-28 10:23:08,116 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-02-28 10:23:08,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:23:08" (1/1) ... [2019-02-28 10:23:08,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:23:08" (1/1) ... [2019-02-28 10:23:08,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:23:08" (1/1) ... [2019-02-28 10:23:08,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:23:08" (1/1) ... [2019-02-28 10:23:08,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:23:08" (1/1) ... [2019-02-28 10:23:08,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:23:08" (1/1) ... [2019-02-28 10:23:08,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:23:08" (1/1) ... [2019-02-28 10:23:08,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-02-28 10:23:08,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-02-28 10:23:08,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-02-28 10:23:08,146 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-02-28 10:23:08,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:23:08" (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:16092 -smt2 -in -t:200000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:16092 -smt2 -in -t:200000 [2019-02-28 10:23:08,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-02-28 10:23:08,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-02-28 10:23:08,776 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-02-28 10:23:08,777 INFO L286 CfgBuilder]: Removed 17 assue(true) statements. [2019-02-28 10:23:08,778 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.02 10:23:08 BoogieIcfgContainer [2019-02-28 10:23:08,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-02-28 10:23:08,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-02-28 10:23:08,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-02-28 10:23:08,782 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-02-28 10:23:08,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.02 10:23:08" (1/2) ... [2019-02-28 10:23:08,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c32c7e6 and model type speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.02 10:23:08, skipping insertion in model container [2019-02-28 10:23:08,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.02 10:23:08" (2/2) ... [2019-02-28 10:23:08,785 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-7-limited.bpl [2019-02-28 10:23:08,794 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-02-28 10:23:08,802 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-02-28 10:23:08,815 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-02-28 10:23:08,842 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-02-28 10:23:08,843 INFO L383 AbstractCegarLoop]: Hoare is true [2019-02-28 10:23:08,843 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-02-28 10:23:08,843 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-02-28 10:23:08,843 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-02-28 10:23:08,844 INFO L387 AbstractCegarLoop]: Difference is false [2019-02-28 10:23:08,844 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-02-28 10:23:08,844 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-02-28 10:23:08,858 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-02-28 10:23:08,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-02-28 10:23:08,864 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:23:08,865 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-02-28 10:23:08,869 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:23:08,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:08,874 INFO L82 PathProgramCache]: Analyzing trace with hash 992, now seen corresponding path program 1 times [2019-02-28 10:23:08,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:23:08,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:08,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:08,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:08,922 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:23:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:09,072 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-28 10:23:09,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-28 10:23:09,073 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-28 10:23:09,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-28 10:23:09,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-28 10:23:09,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-28 10:23:09,090 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-02-28 10:23:09,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:23:09,289 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2019-02-28 10:23:09,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-28 10:23:09,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-02-28 10:23:09,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:23:09,305 INFO L225 Difference]: With dead ends: 33 [2019-02-28 10:23:09,305 INFO L226 Difference]: Without dead ends: 28 [2019-02-28 10:23:09,308 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-28 10:23:09,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-02-28 10:23:09,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2019-02-28 10:23:09,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-02-28 10:23:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 29 transitions. [2019-02-28 10:23:09,346 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 29 transitions. Word has length 2 [2019-02-28 10:23:09,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:23:09,348 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 29 transitions. [2019-02-28 10:23:09,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-28 10:23:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 29 transitions. [2019-02-28 10:23:09,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-28 10:23:09,349 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:23:09,349 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-28 10:23:09,350 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:23:09,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:09,350 INFO L82 PathProgramCache]: Analyzing trace with hash 30816, now seen corresponding path program 1 times [2019-02-28 10:23:09,351 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:23:09,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:09,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:09,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:09,352 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:23:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:09,428 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-28 10:23:09,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-28 10:23:09,428 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-28 10:23:09,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-28 10:23:09,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-28 10:23:09,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-28 10:23:09,431 INFO L87 Difference]: Start difference. First operand 16 states and 29 transitions. Second operand 3 states. [2019-02-28 10:23:09,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:23:09,663 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2019-02-28 10:23:09,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-28 10:23:09,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-02-28 10:23:09,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:23:09,665 INFO L225 Difference]: With dead ends: 28 [2019-02-28 10:23:09,665 INFO L226 Difference]: Without dead ends: 27 [2019-02-28 10:23:09,667 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-28 10:23:09,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-02-28 10:23:09,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2019-02-28 10:23:09,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-02-28 10:23:09,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 30 transitions. [2019-02-28 10:23:09,672 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 30 transitions. Word has length 3 [2019-02-28 10:23:09,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:23:09,672 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 30 transitions. [2019-02-28 10:23:09,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-28 10:23:09,672 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 30 transitions. [2019-02-28 10:23:09,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-28 10:23:09,673 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:23:09,673 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-28 10:23:09,673 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:23:09,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:09,674 INFO L82 PathProgramCache]: Analyzing trace with hash 30380, now seen corresponding path program 1 times [2019-02-28 10:23:09,674 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:23:09,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:09,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:09,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:09,676 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:23:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:09,926 WARN L181 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2019-02-28 10:23:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:09,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:09,959 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:23:09,960 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-28 10:23:09,962 INFO L207 CegarAbsIntRunner]: [0], [18], [31] [2019-02-28 10:23:09,999 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:23:09,999 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:23:10,093 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:23:10,094 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-28 10:23:10,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:10,100 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:23:10,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:10,101 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:23:10,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:10,116 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:23:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:10,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 13 conjunts are in the unsatisfiable core [2019-02-28 10:23:10,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:23:10,181 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,187 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,189 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,196 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,210 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,217 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,232 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,239 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-02-28 10:23:10,240 INFO L315 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:10,321 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:10,324 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:10,373 INFO L442 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 24 treesize of output 27 [2019-02-28 10:23:10,384 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,386 INFO L442 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 27 treesize of output 29 [2019-02-28 10:23:10,403 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,404 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,406 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,408 INFO L442 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 29 treesize of output 31 [2019-02-28 10:23:10,425 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,426 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,428 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,430 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,455 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,477 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,480 INFO L442 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 31 treesize of output 33 [2019-02-28 10:23:10,521 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,534 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,536 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,538 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,540 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,542 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,544 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,545 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,550 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,577 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,580 INFO L442 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 33 treesize of output 35 [2019-02-28 10:23:10,598 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,599 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,600 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,626 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,633 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,635 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,637 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,638 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,639 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,643 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,644 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,645 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,646 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,647 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,649 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,653 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2019-02-28 10:23:10,661 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,665 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,667 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,669 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,671 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,673 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,674 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,674 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,675 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,676 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,677 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,678 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,680 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,681 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,683 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,684 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,686 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,687 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,690 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,691 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,692 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:10,695 INFO L442 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 37 treesize of output 36 [2019-02-28 10:23:10,697 INFO L315 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:10,770 INFO L315 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:10,792 INFO L315 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:10,809 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:10,835 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:10,853 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:10,870 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:10,916 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:10,917 INFO L209 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:71, output treesize:54 [2019-02-28 10:23:11,038 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,040 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,042 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,043 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,045 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,046 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,047 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,048 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,049 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,072 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,078 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,079 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,080 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,082 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,084 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,086 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,088 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,092 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,094 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,095 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,096 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:11,099 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-02-28 10:23:11,100 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:11,174 INFO L315 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:11,174 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:56 [2019-02-28 10:23:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:12,598 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:23:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:12,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:23:12,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-28 10:23:12,668 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:23:12,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-28 10:23:12,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-28 10:23:12,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-28 10:23:12,669 INFO L87 Difference]: Start difference. First operand 17 states and 30 transitions. Second operand 6 states. [2019-02-28 10:23:37,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:23:37,443 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2019-02-28 10:23:37,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-28 10:23:37,444 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-28 10:23:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:23:37,445 INFO L225 Difference]: With dead ends: 54 [2019-02-28 10:23:37,445 INFO L226 Difference]: Without dead ends: 52 [2019-02-28 10:23:37,446 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-28 10:23:37,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-02-28 10:23:37,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 20. [2019-02-28 10:23:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-02-28 10:23:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 41 transitions. [2019-02-28 10:23:37,452 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 41 transitions. Word has length 3 [2019-02-28 10:23:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:23:37,453 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 41 transitions. [2019-02-28 10:23:37,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-28 10:23:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 41 transitions. [2019-02-28 10:23:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-28 10:23:37,454 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:23:37,454 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-28 10:23:37,454 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:23:37,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:37,455 INFO L82 PathProgramCache]: Analyzing trace with hash 30008, now seen corresponding path program 1 times [2019-02-28 10:23:37,455 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:23:37,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:37,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:37,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:37,456 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:23:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:37,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:37,533 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:23:37,533 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-28 10:23:37,534 INFO L207 CegarAbsIntRunner]: [0], [6], [31] [2019-02-28 10:23:37,535 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:23:37,535 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:23:37,548 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:23:37,548 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-28 10:23:37,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:37,549 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:23:37,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:37,549 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:23:37,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:37,559 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:23:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:37,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 13 conjunts are in the unsatisfiable core [2019-02-28 10:23:37,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:23:37,593 INFO L442 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 24 treesize of output 27 [2019-02-28 10:23:37,619 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,620 INFO L442 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 27 treesize of output 29 [2019-02-28 10:23:37,634 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,647 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,649 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,650 INFO L442 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 29 treesize of output 31 [2019-02-28 10:23:37,658 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,662 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,664 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,666 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,668 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,670 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,672 INFO L442 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 31 treesize of output 33 [2019-02-28 10:23:37,695 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,698 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,705 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,713 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,715 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,719 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,720 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,721 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,722 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,723 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,725 INFO L442 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 33 treesize of output 35 [2019-02-28 10:23:37,735 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,737 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,739 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,741 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,743 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,753 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,758 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,760 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,762 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,764 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,766 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,768 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,770 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,772 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,774 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,777 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2019-02-28 10:23:37,784 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,786 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,788 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,805 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,807 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,809 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,811 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,812 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,813 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,817 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,818 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,819 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,824 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,825 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,829 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,853 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,855 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,856 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,857 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,859 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,861 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:37,863 INFO L442 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 37 treesize of output 36 [2019-02-28 10:23:37,864 INFO L315 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:37,884 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:37,918 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:37,967 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:37,984 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:38,006 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:38,034 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:38,078 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,079 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,080 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,081 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,087 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,091 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,094 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,095 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-02-28 10:23:38,096 INFO L315 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:38,099 INFO L315 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:38,100 INFO L315 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:38,161 INFO L315 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:38,161 INFO L209 ElimStorePlain]: Needed 11 recursive calls to eliminate 8 variables, input treesize:71, output treesize:54 [2019-02-28 10:23:38,207 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,208 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,208 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,209 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,210 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,211 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,212 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,214 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,215 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,216 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,218 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,219 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,226 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,227 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,228 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,228 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,229 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,230 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,233 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,234 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,235 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,237 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-02-28 10:23:38,238 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:38,268 INFO L315 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:38,269 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-02-28 10:23:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:38,294 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:23:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:38,343 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-02-28 10:23:38,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2019-02-28 10:23:38,344 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-28 10:23:38,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-28 10:23:38,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-28 10:23:38,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-28 10:23:38,345 INFO L87 Difference]: Start difference. First operand 20 states and 41 transitions. Second operand 4 states. [2019-02-28 10:23:38,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:23:38,419 INFO L93 Difference]: Finished difference Result 25 states and 67 transitions. [2019-02-28 10:23:38,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-28 10:23:38,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-02-28 10:23:38,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:23:38,421 INFO L225 Difference]: With dead ends: 25 [2019-02-28 10:23:38,422 INFO L226 Difference]: Without dead ends: 24 [2019-02-28 10:23:38,422 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-28 10:23:38,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-02-28 10:23:38,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-02-28 10:23:38,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-02-28 10:23:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 66 transitions. [2019-02-28 10:23:38,429 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 66 transitions. Word has length 3 [2019-02-28 10:23:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:23:38,429 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 66 transitions. [2019-02-28 10:23:38,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-28 10:23:38,429 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 66 transitions. [2019-02-28 10:23:38,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-28 10:23:38,430 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:23:38,430 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-28 10:23:38,430 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:23:38,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:38,431 INFO L82 PathProgramCache]: Analyzing trace with hash 30132, now seen corresponding path program 1 times [2019-02-28 10:23:38,431 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:23:38,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:38,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:38,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:23:38,432 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:23:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:38,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:38,547 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:23:38,547 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-28 10:23:38,547 INFO L207 CegarAbsIntRunner]: [0], [10], [31] [2019-02-28 10:23:38,548 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:23:38,548 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:23:38,558 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:23:38,558 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-28 10:23:38,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:23:38,558 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:23:38,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:23:38,559 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:23:38,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:23:38,570 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:23:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:23:38,578 WARN L254 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 15 conjunts are in the unsatisfiable core [2019-02-28 10:23:38,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:23:38,608 INFO L442 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 24 treesize of output 27 [2019-02-28 10:23:38,629 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,631 INFO L442 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 27 treesize of output 29 [2019-02-28 10:23:38,643 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,645 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,648 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,649 INFO L442 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 29 treesize of output 31 [2019-02-28 10:23:38,653 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,655 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,657 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,659 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,661 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,663 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,664 INFO L442 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 31 treesize of output 33 [2019-02-28 10:23:38,675 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,677 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,679 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,681 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,683 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,685 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,687 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,688 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,694 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,696 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,697 INFO L442 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 33 treesize of output 35 [2019-02-28 10:23:38,711 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,712 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,713 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,715 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,716 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,718 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,719 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,721 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,722 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,724 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,726 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,728 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,730 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,737 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,738 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,740 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2019-02-28 10:23:38,751 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,752 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,753 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,755 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,756 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,758 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,760 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,779 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,788 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,790 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,791 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,792 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,793 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,794 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,796 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,797 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,799 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,801 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,802 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,804 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,805 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:38,807 INFO L442 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 37 treesize of output 36 [2019-02-28 10:23:38,808 INFO L315 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:38,830 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:38,872 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:38,893 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:38,912 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:38,936 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:38,954 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:39,012 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,014 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,015 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,016 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,018 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,023 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,024 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,028 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,032 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,033 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,035 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,036 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2019-02-28 10:23:39,037 INFO L315 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:39,046 INFO L315 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:39,047 INFO L315 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:39,049 INFO L315 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:23:39,079 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:39,080 INFO L209 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:82, output treesize:54 [2019-02-28 10:23:39,111 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,113 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,115 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,116 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,117 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,118 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,119 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,121 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,122 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,123 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,124 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,126 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,127 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,128 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,129 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,131 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,132 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,134 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,135 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,136 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,137 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:23:39,140 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-02-28 10:23:39,141 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:23:39,183 INFO L315 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-28 10:23:39,184 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:56 [2019-02-28 10:23:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:40,413 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:23:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:23:40,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:23:40,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-28 10:23:40,445 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:23:40,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-28 10:23:40,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-28 10:23:40,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-28 10:23:40,446 INFO L87 Difference]: Start difference. First operand 23 states and 66 transitions. Second operand 6 states. [2019-02-28 10:24:01,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:24:01,273 INFO L93 Difference]: Finished difference Result 57 states and 111 transitions. [2019-02-28 10:24:01,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-28 10:24:01,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-28 10:24:01,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:24:01,277 INFO L225 Difference]: With dead ends: 57 [2019-02-28 10:24:01,277 INFO L226 Difference]: Without dead ends: 56 [2019-02-28 10:24:01,277 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-28 10:24:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-02-28 10:24:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 25. [2019-02-28 10:24:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-02-28 10:24:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 82 transitions. [2019-02-28 10:24:01,285 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 82 transitions. Word has length 3 [2019-02-28 10:24:01,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:24:01,285 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 82 transitions. [2019-02-28 10:24:01,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-28 10:24:01,286 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 82 transitions. [2019-02-28 10:24:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-28 10:24:01,286 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:24:01,286 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-28 10:24:01,286 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:24:01,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:24:01,287 INFO L82 PathProgramCache]: Analyzing trace with hash 30628, now seen corresponding path program 1 times [2019-02-28 10:24:01,287 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:24:01,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:24:01,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:24:01,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:24:01,288 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:24:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:24:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:24:01,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:24:01,418 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:24:01,418 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-28 10:24:01,419 INFO L207 CegarAbsIntRunner]: [0], [26], [31] [2019-02-28 10:24:01,420 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:24:01,420 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:24:01,428 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:24:01,428 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-28 10:24:01,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:24:01,429 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:24:01,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:24:01,429 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:24:01,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:24:01,439 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:24:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:24:01,460 WARN L254 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 15 conjunts are in the unsatisfiable core [2019-02-28 10:24:01,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:24:01,469 INFO L442 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 24 treesize of output 27 [2019-02-28 10:24:01,475 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,476 INFO L442 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 27 treesize of output 29 [2019-02-28 10:24:01,519 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,547 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,569 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,570 INFO L442 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 29 treesize of output 31 [2019-02-28 10:24:01,575 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,576 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,577 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,578 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,579 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,580 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,582 INFO L442 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 31 treesize of output 33 [2019-02-28 10:24:01,591 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,596 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,598 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,600 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,602 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,604 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,606 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,632 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,644 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,645 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,648 INFO L442 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 33 treesize of output 35 [2019-02-28 10:24:01,655 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,656 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,657 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,658 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,659 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,661 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,662 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,663 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,665 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,666 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,668 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,669 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,671 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,672 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,674 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,675 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2019-02-28 10:24:01,682 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,683 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,684 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,685 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,687 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,688 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,689 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,691 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,692 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,694 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,695 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,697 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,698 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,700 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,701 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,702 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,704 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,705 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,707 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,708 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,710 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,711 INFO L442 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 37 treesize of output 36 [2019-02-28 10:24:01,712 INFO L315 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-28 10:24:01,730 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:01,747 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:01,764 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:01,782 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:01,799 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:01,816 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:01,895 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,897 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,898 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,899 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,900 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,905 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,908 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,909 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,917 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,918 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,919 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:01,919 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2019-02-28 10:24:01,920 INFO L315 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-28 10:24:01,923 INFO L315 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:01,924 INFO L315 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:01,926 INFO L315 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:01,966 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:24:01,967 INFO L209 ElimStorePlain]: Needed 12 recursive calls to eliminate 7 variables, input treesize:82, output treesize:54 [2019-02-28 10:24:02,025 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,033 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,035 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,037 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,038 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,038 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,039 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,040 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,041 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,042 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,043 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,044 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,045 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,046 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,048 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,049 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,050 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,051 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,052 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,053 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,054 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:02,056 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-02-28 10:24:02,057 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:24:02,085 INFO L315 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-28 10:24:02,085 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:56 [2019-02-28 10:24:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:24:03,274 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:24:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:24:03,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:24:03,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-28 10:24:03,311 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:24:03,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-28 10:24:03,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-28 10:24:03,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-28 10:24:03,312 INFO L87 Difference]: Start difference. First operand 25 states and 82 transitions. Second operand 6 states. [2019-02-28 10:24:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:24:29,651 INFO L93 Difference]: Finished difference Result 59 states and 127 transitions. [2019-02-28 10:24:29,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-28 10:24:29,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-28 10:24:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:24:29,653 INFO L225 Difference]: With dead ends: 59 [2019-02-28 10:24:29,653 INFO L226 Difference]: Without dead ends: 57 [2019-02-28 10:24:29,654 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-02-28 10:24:29,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-02-28 10:24:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2019-02-28 10:24:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-02-28 10:24:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 101 transitions. [2019-02-28 10:24:29,661 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 101 transitions. Word has length 3 [2019-02-28 10:24:29,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:24:29,661 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 101 transitions. [2019-02-28 10:24:29,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-28 10:24:29,661 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 101 transitions. [2019-02-28 10:24:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-28 10:24:29,662 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:24:29,662 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-28 10:24:29,663 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:24:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:24:29,663 INFO L82 PathProgramCache]: Analyzing trace with hash 955362, now seen corresponding path program 1 times [2019-02-28 10:24:29,663 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:24:29,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:24:29,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:24:29,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:24:29,664 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:24:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:24:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:24:29,722 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-28 10:24:29,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-28 10:24:29,722 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-28 10:24:29,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-28 10:24:29,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-28 10:24:29,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-28 10:24:29,723 INFO L87 Difference]: Start difference. First operand 29 states and 101 transitions. Second operand 3 states. [2019-02-28 10:24:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:24:30,020 INFO L93 Difference]: Finished difference Result 33 states and 102 transitions. [2019-02-28 10:24:30,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-28 10:24:30,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-02-28 10:24:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:24:30,022 INFO L225 Difference]: With dead ends: 33 [2019-02-28 10:24:30,022 INFO L226 Difference]: Without dead ends: 32 [2019-02-28 10:24:30,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-28 10:24:30,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-02-28 10:24:30,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-02-28 10:24:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-02-28 10:24:30,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 100 transitions. [2019-02-28 10:24:30,030 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 100 transitions. Word has length 4 [2019-02-28 10:24:30,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:24:30,030 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 100 transitions. [2019-02-28 10:24:30,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-28 10:24:30,030 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 100 transitions. [2019-02-28 10:24:30,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-28 10:24:30,031 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:24:30,031 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-28 10:24:30,031 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:24:30,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:24:30,031 INFO L82 PathProgramCache]: Analyzing trace with hash 941844, now seen corresponding path program 1 times [2019-02-28 10:24:30,031 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:24:30,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:24:30,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:24:30,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:24:30,032 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:24:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:24:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:24:30,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:24:30,088 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:24:30,088 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-28 10:24:30,088 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [33] [2019-02-28 10:24:30,089 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:24:30,089 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:24:30,099 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:24:30,100 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-28 10:24:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:24:30,100 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:24:30,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:24:30,100 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:24:30,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:24:30,111 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:24:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:24:30,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-02-28 10:24:30,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:24:30,147 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,149 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,150 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,151 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,154 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2019-02-28 10:24:30,155 INFO L315 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-28 10:24:30,157 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:30,175 INFO L442 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 24 treesize of output 27 [2019-02-28 10:24:30,192 INFO L442 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2019-02-28 10:24:30,203 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,212 INFO L442 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2019-02-28 10:24:30,216 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,245 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,246 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,256 INFO L442 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 2 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 36 [2019-02-28 10:24:30,296 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,319 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,355 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,356 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,357 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,359 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,374 INFO L442 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 2 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 38 [2019-02-28 10:24:30,378 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,379 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,380 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,382 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,383 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,384 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,387 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,388 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,406 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,411 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,413 INFO L442 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 4 case distinctions, treesize of input 35 treesize of output 37 [2019-02-28 10:24:30,417 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,417 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,418 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,419 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,420 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,422 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,431 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,452 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,458 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,458 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,459 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,461 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,462 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,464 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,465 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,477 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 39 [2019-02-28 10:24:30,478 INFO L315 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-02-28 10:24:30,492 INFO L315 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:30,505 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:30,519 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:30,533 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:30,547 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:30,561 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:30,590 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:24:30,591 INFO L209 ElimStorePlain]: Needed 10 recursive calls to eliminate 7 variables, input treesize:60, output treesize:55 [2019-02-28 10:24:30,612 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,613 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,614 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,614 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,615 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,617 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,618 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,619 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,621 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,623 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,624 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,625 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,627 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,628 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,630 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:30,643 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 48 [2019-02-28 10:24:30,644 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-28 10:24:30,704 INFO L315 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 11 dim-0 vars, and 2 xjuncts. [2019-02-28 10:24:30,705 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:65, output treesize:110 [2019-02-28 10:24:32,082 WARN L181 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2019-02-28 10:24:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:24:32,086 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:24:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:24:32,225 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-02-28 10:24:32,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2019-02-28 10:24:32,225 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-28 10:24:32,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-28 10:24:32,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-28 10:24:32,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2019-02-28 10:24:32,226 INFO L87 Difference]: Start difference. First operand 29 states and 100 transitions. Second operand 4 states. [2019-02-28 10:24:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:24:32,298 INFO L93 Difference]: Finished difference Result 33 states and 111 transitions. [2019-02-28 10:24:32,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-28 10:24:32,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-02-28 10:24:32,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:24:32,299 INFO L225 Difference]: With dead ends: 33 [2019-02-28 10:24:32,299 INFO L226 Difference]: Without dead ends: 32 [2019-02-28 10:24:32,300 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2019-02-28 10:24:32,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-02-28 10:24:32,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-02-28 10:24:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-02-28 10:24:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 110 transitions. [2019-02-28 10:24:32,307 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 110 transitions. Word has length 4 [2019-02-28 10:24:32,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:24:32,307 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 110 transitions. [2019-02-28 10:24:32,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-28 10:24:32,307 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 110 transitions. [2019-02-28 10:24:32,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-28 10:24:32,308 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:24:32,308 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-28 10:24:32,308 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:24:32,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:24:32,309 INFO L82 PathProgramCache]: Analyzing trace with hash 941532, now seen corresponding path program 1 times [2019-02-28 10:24:32,309 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:24:32,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:24:32,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:24:32,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:24:32,310 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:24:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:24:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:24:32,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:24:32,426 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:24:32,426 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-28 10:24:32,426 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [31] [2019-02-28 10:24:32,428 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:24:32,428 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:24:32,435 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:24:32,435 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-28 10:24:32,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:24:32,436 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:24:32,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:24:32,436 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:24:32,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:24:32,446 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:24:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:24:32,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 14 conjunts are in the unsatisfiable core [2019-02-28 10:24:32,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:24:32,461 INFO L442 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 24 treesize of output 27 [2019-02-28 10:24:32,478 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,478 INFO L442 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 27 treesize of output 29 [2019-02-28 10:24:32,485 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,487 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,489 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,489 INFO L442 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 29 treesize of output 31 [2019-02-28 10:24:32,494 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,495 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,495 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,496 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,497 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,501 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,502 INFO L442 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 31 treesize of output 33 [2019-02-28 10:24:32,507 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,508 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,510 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,513 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,514 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,539 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,561 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,574 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,575 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,576 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,577 INFO L442 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 33 treesize of output 35 [2019-02-28 10:24:32,581 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,582 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,583 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,583 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,584 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,586 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,587 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,588 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,590 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,591 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,592 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,593 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,595 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,596 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,597 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,599 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2019-02-28 10:24:32,602 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,603 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,604 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,606 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,607 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,608 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,610 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,611 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,612 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,613 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,615 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,616 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,617 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,619 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,620 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,621 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,623 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,624 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,625 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,626 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,628 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,629 INFO L442 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 37 treesize of output 36 [2019-02-28 10:24:32,630 INFO L315 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-28 10:24:32,733 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:32,840 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:32,855 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:32,871 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:32,887 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:32,905 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:32,944 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,945 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,946 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,946 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,948 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,951 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,955 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:32,956 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-02-28 10:24:32,956 INFO L315 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-28 10:24:32,958 INFO L315 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:32,959 INFO L315 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:24:32,987 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:24:32,987 INFO L209 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-02-28 10:24:33,036 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,037 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,038 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,039 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,040 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,041 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,042 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,043 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,044 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,045 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,046 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,047 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,048 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,050 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,051 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,052 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,053 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,054 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,055 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,056 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,057 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,059 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-02-28 10:24:33,060 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:24:33,085 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:24:33,085 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:56 [2019-02-28 10:24:33,121 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,122 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,123 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,123 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,124 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,126 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,127 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,128 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,129 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,131 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,132 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,133 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,134 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,136 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,137 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,138 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,140 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,141 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,142 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,143 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,145 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:24:33,147 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 43 [2019-02-28 10:24:33,148 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:24:33,180 INFO L315 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-28 10:24:33,181 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-02-28 10:24:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:24:35,562 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:24:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:24:35,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:24:35,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-28 10:24:35,606 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:24:35,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-28 10:24:35,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-28 10:24:35,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-28 10:24:35,607 INFO L87 Difference]: Start difference. First operand 31 states and 110 transitions. Second operand 8 states. [2019-02-28 10:25:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:25:25,085 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2019-02-28 10:25:25,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-28 10:25:25,085 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-28 10:25:25,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:25:25,087 INFO L225 Difference]: With dead ends: 74 [2019-02-28 10:25:25,087 INFO L226 Difference]: Without dead ends: 72 [2019-02-28 10:25:25,087 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-28 10:25:25,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-02-28 10:25:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 38. [2019-02-28 10:25:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-02-28 10:25:25,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 139 transitions. [2019-02-28 10:25:25,102 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 139 transitions. Word has length 4 [2019-02-28 10:25:25,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:25:25,102 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 139 transitions. [2019-02-28 10:25:25,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-28 10:25:25,102 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 139 transitions. [2019-02-28 10:25:25,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-28 10:25:25,103 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:25:25,103 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-28 10:25:25,103 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:25:25,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:25:25,103 INFO L82 PathProgramCache]: Analyzing trace with hash 941160, now seen corresponding path program 1 times [2019-02-28 10:25:25,104 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:25:25,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:25:25,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:25:25,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:25:25,104 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:25:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:25:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:25:25,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:25:25,233 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:25:25,234 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-28 10:25:25,234 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [31] [2019-02-28 10:25:25,235 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:25:25,235 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:25:25,242 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:25:25,242 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-28 10:25:25,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:25:25,243 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:25:25,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:25:25,243 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:25:25,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:25:25,260 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:25:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:25:25,270 WARN L254 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 16 conjunts are in the unsatisfiable core [2019-02-28 10:25:25,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:25:25,278 INFO L442 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 24 treesize of output 27 [2019-02-28 10:25:25,281 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,282 INFO L442 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 27 treesize of output 29 [2019-02-28 10:25:25,286 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,288 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,292 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,293 INFO L442 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 29 treesize of output 31 [2019-02-28 10:25:25,296 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,297 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,299 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,300 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,302 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,303 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,304 INFO L442 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 31 treesize of output 33 [2019-02-28 10:25:25,309 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,310 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,311 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,312 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,313 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,314 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,316 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,317 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,319 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,320 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,321 INFO L442 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 33 treesize of output 35 [2019-02-28 10:25:25,339 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,340 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,341 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,342 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,343 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,344 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,345 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,347 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,348 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,350 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,351 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,353 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,354 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,356 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,357 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,358 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2019-02-28 10:25:25,363 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,364 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,365 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,366 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,367 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,369 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,370 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,372 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,373 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,375 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,376 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,378 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,379 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,381 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,382 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,384 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,385 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,386 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,388 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,389 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,391 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,392 INFO L442 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 37 treesize of output 36 [2019-02-28 10:25:25,393 INFO L315 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-28 10:25:25,411 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:25:25,431 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:25:25,446 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:25:25,487 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:25:25,506 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:25:25,523 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:25:25,570 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,570 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,572 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,573 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,574 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,578 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,581 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,583 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,584 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,588 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,589 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,590 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,591 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2019-02-28 10:25:25,591 INFO L315 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-28 10:25:25,593 INFO L315 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:25:25,595 INFO L315 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:25:25,597 INFO L315 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:25:25,625 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:25:25,626 INFO L209 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:85, output treesize:54 [2019-02-28 10:25:25,661 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,662 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,663 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,664 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,665 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,666 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,667 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,668 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,669 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,670 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,673 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,674 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,675 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,675 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,676 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,677 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,678 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,679 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,681 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,682 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,683 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,684 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-02-28 10:25:25,685 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:25:25,717 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:25:25,717 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:56 [2019-02-28 10:25:25,879 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,880 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,881 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,882 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,883 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,884 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,888 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,889 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,889 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,890 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,891 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,891 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,892 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,894 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,895 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,896 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,897 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,898 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,899 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,900 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,901 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:25:25,903 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 43 [2019-02-28 10:25:25,903 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:25:25,933 INFO L315 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-28 10:25:25,933 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:58 [2019-02-28 10:25:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:25:28,298 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:25:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:25:28,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:25:28,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-28 10:25:28,384 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:25:28,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-28 10:25:28,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-28 10:25:28,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-28 10:25:28,385 INFO L87 Difference]: Start difference. First operand 38 states and 139 transitions. Second operand 8 states. [2019-02-28 10:26:15,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:26:15,980 INFO L93 Difference]: Finished difference Result 71 states and 181 transitions. [2019-02-28 10:26:15,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-28 10:26:15,980 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-28 10:26:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:26:15,982 INFO L225 Difference]: With dead ends: 71 [2019-02-28 10:26:15,982 INFO L226 Difference]: Without dead ends: 70 [2019-02-28 10:26:15,982 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-02-28 10:26:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-02-28 10:26:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2019-02-28 10:26:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-02-28 10:26:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 139 transitions. [2019-02-28 10:26:15,991 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 139 transitions. Word has length 4 [2019-02-28 10:26:15,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:26:15,991 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 139 transitions. [2019-02-28 10:26:15,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-28 10:26:15,991 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 139 transitions. [2019-02-28 10:26:15,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-28 10:26:15,992 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:26:15,992 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-28 10:26:15,992 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:26:15,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:26:15,993 INFO L82 PathProgramCache]: Analyzing trace with hash 941656, now seen corresponding path program 1 times [2019-02-28 10:26:15,993 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:26:15,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:26:15,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:26:15,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:26:15,994 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:26:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:26:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:26:16,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:26:16,086 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:26:16,086 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-28 10:26:16,086 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [31] [2019-02-28 10:26:16,088 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:26:16,088 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:26:16,094 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:26:16,095 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-28 10:26:16,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:26:16,095 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:26:16,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:26:16,095 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:26:16,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:26:16,108 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:26:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:26:16,120 WARN L254 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 16 conjunts are in the unsatisfiable core [2019-02-28 10:26:16,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:26:16,158 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,159 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,161 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,165 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,166 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,167 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,168 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,169 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,179 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,180 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,181 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,181 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2019-02-28 10:26:16,182 INFO L315 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-02-28 10:26:16,183 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:26:16,185 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:26:16,190 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:26:16,205 INFO L442 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 24 treesize of output 27 [2019-02-28 10:26:16,209 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,210 INFO L442 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 27 treesize of output 29 [2019-02-28 10:26:16,212 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,213 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,214 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,215 INFO L442 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 29 treesize of output 31 [2019-02-28 10:26:16,218 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,218 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,219 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,220 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,222 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,223 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,224 INFO L442 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 31 treesize of output 33 [2019-02-28 10:26:16,245 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,246 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,246 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,247 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,248 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,248 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,249 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,250 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,252 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,253 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,254 INFO L442 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 33 treesize of output 35 [2019-02-28 10:26:16,257 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,258 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,259 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,261 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,262 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,263 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,264 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,265 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,266 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,267 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,269 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,270 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,271 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,272 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,273 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,274 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2019-02-28 10:26:16,277 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,278 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,279 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,280 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,281 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,282 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,283 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,285 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,286 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,287 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,288 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,289 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,290 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,292 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,293 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,294 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,295 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,296 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,297 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,298 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,300 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,301 INFO L442 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 37 treesize of output 36 [2019-02-28 10:26:16,301 INFO L315 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-02-28 10:26:16,347 INFO L315 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:26:16,359 INFO L315 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:26:16,373 INFO L315 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:26:16,387 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:26:16,401 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:26:16,415 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:26:16,444 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:26:16,444 INFO L209 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-02-28 10:26:16,482 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,483 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,484 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,485 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,486 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,487 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,488 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,489 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,490 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,491 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,493 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,494 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,495 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,496 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,497 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,498 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,499 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,500 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,502 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,503 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,504 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,507 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-02-28 10:26:16,508 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:26:16,537 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:26:16,538 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:56 [2019-02-28 10:26:16,624 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,626 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,627 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,628 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,629 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,630 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,631 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,632 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,633 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,635 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,636 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,637 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,638 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,639 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,640 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,641 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,642 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,643 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,645 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,646 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,647 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:26:16,648 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 43 [2019-02-28 10:26:16,649 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:26:16,678 INFO L315 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-28 10:26:16,678 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:58 [2019-02-28 10:26:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:26:19,073 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:26:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:26:19,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:26:19,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-28 10:26:19,114 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:26:19,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-28 10:26:19,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-28 10:26:19,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-28 10:26:19,115 INFO L87 Difference]: Start difference. First operand 38 states and 139 transitions. Second operand 8 states. [2019-02-28 10:27:07,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:27:07,320 INFO L93 Difference]: Finished difference Result 71 states and 181 transitions. [2019-02-28 10:27:07,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-28 10:27:07,320 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-28 10:27:07,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:27:07,321 INFO L225 Difference]: With dead ends: 71 [2019-02-28 10:27:07,322 INFO L226 Difference]: Without dead ends: 69 [2019-02-28 10:27:07,322 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-02-28 10:27:07,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-02-28 10:27:07,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 37. [2019-02-28 10:27:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-02-28 10:27:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 138 transitions. [2019-02-28 10:27:07,330 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 138 transitions. Word has length 4 [2019-02-28 10:27:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:27:07,331 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 138 transitions. [2019-02-28 10:27:07,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-28 10:27:07,331 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 138 transitions. [2019-02-28 10:27:07,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-28 10:27:07,331 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:27:07,331 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-28 10:27:07,332 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:27:07,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:27:07,332 INFO L82 PathProgramCache]: Analyzing trace with hash 941718, now seen corresponding path program 1 times [2019-02-28 10:27:07,332 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:27:07,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:27:07,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:27:07,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:27:07,333 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:27:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:27:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:27:07,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:27:07,466 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:27:07,466 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-28 10:27:07,466 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [31] [2019-02-28 10:27:07,467 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:27:07,467 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:27:07,473 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:27:07,473 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-28 10:27:07,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:27:07,474 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:27:07,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:27:07,474 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:27:07,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:27:07,487 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:27:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:27:07,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 14 conjunts are in the unsatisfiable core [2019-02-28 10:27:07,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:27:07,501 INFO L442 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 24 treesize of output 27 [2019-02-28 10:27:07,505 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,505 INFO L442 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 27 treesize of output 29 [2019-02-28 10:27:07,509 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,510 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,511 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,512 INFO L442 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 29 treesize of output 31 [2019-02-28 10:27:07,517 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,517 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,518 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,519 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,520 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,521 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,523 INFO L442 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 31 treesize of output 33 [2019-02-28 10:27:07,534 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,535 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,536 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,537 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,538 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,539 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,541 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,542 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,543 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,545 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,547 INFO L442 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 33 treesize of output 35 [2019-02-28 10:27:07,561 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,562 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,563 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,564 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,565 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,566 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,568 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,569 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,570 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,572 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,573 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,574 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,575 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,577 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,578 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,579 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2019-02-28 10:27:07,615 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,632 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,651 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,652 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,653 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,653 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,655 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,656 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,657 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,659 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,660 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,661 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,663 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,664 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,665 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,666 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,668 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,669 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,670 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,672 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,673 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,674 INFO L442 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 37 treesize of output 36 [2019-02-28 10:27:07,675 INFO L315 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-28 10:27:07,691 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:27:07,708 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:27:07,724 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:27:07,741 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:27:07,757 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:27:07,795 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:27:07,838 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,840 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,841 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,842 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,843 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,847 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,850 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,851 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-02-28 10:27:07,851 INFO L315 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-28 10:27:07,853 INFO L315 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:27:07,855 INFO L315 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:27:07,884 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:27:07,885 INFO L209 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-02-28 10:27:07,911 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,912 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,912 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,915 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,916 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,917 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,918 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,919 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,920 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,921 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,922 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,924 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,925 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,926 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,928 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,929 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,930 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,931 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,933 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,934 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,935 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:07,937 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-02-28 10:27:07,938 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:27:07,970 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:27:07,970 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:56 [2019-02-28 10:27:08,159 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,160 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,161 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,161 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,163 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,164 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,165 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,166 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,168 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,169 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,170 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,172 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,173 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,174 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,175 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,177 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,178 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,179 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,180 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,182 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,183 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:08,184 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 43 [2019-02-28 10:27:08,185 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:27:08,218 INFO L315 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-28 10:27:08,218 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-02-28 10:27:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:27:10,616 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:27:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:27:10,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:27:10,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-28 10:27:10,658 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:27:10,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-28 10:27:10,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-28 10:27:10,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-28 10:27:10,658 INFO L87 Difference]: Start difference. First operand 37 states and 138 transitions. Second operand 8 states. [2019-02-28 10:27:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:27:56,018 INFO L93 Difference]: Finished difference Result 74 states and 200 transitions. [2019-02-28 10:27:56,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-28 10:27:56,019 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-28 10:27:56,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:27:56,020 INFO L225 Difference]: With dead ends: 74 [2019-02-28 10:27:56,020 INFO L226 Difference]: Without dead ends: 63 [2019-02-28 10:27:56,020 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-28 10:27:56,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-02-28 10:27:56,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 35. [2019-02-28 10:27:56,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-02-28 10:27:56,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 155 transitions. [2019-02-28 10:27:56,027 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 155 transitions. Word has length 4 [2019-02-28 10:27:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:27:56,028 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 155 transitions. [2019-02-28 10:27:56,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-28 10:27:56,028 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 155 transitions. [2019-02-28 10:27:56,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-28 10:27:56,028 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:27:56,029 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-28 10:27:56,029 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:27:56,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:27:56,029 INFO L82 PathProgramCache]: Analyzing trace with hash 941284, now seen corresponding path program 1 times [2019-02-28 10:27:56,029 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:27:56,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:27:56,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:27:56,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:27:56,032 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:27:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:27:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:27:56,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:27:56,128 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:27:56,129 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-28 10:27:56,129 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [31] [2019-02-28 10:27:56,130 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:27:56,130 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:27:56,135 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:27:56,136 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-02-28 10:27:56,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:27:56,136 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:27:56,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:27:56,136 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:27:56,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:27:56,150 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:27:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:27:56,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 14 conjunts are in the unsatisfiable core [2019-02-28 10:27:56,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:27:56,164 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,168 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,169 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,170 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,172 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,173 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,176 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,177 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-02-28 10:27:56,178 INFO L315 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-28 10:27:56,187 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:27:56,188 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:27:56,206 INFO L442 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 24 treesize of output 27 [2019-02-28 10:27:56,215 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,216 INFO L442 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 27 treesize of output 29 [2019-02-28 10:27:56,219 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,220 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,221 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,222 INFO L442 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 29 treesize of output 31 [2019-02-28 10:27:56,225 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,225 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,226 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,227 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,227 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,229 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,229 INFO L442 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 31 treesize of output 33 [2019-02-28 10:27:56,232 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,234 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,235 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,236 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,237 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,238 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,239 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,240 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,241 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,243 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,243 INFO L442 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 33 treesize of output 35 [2019-02-28 10:27:56,246 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,248 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,249 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,250 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,251 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,252 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,253 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,254 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,256 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,257 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,258 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,259 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,260 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,261 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,262 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,263 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2019-02-28 10:27:56,266 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,268 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,269 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,278 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,287 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,288 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,289 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,290 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,290 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,291 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,292 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,293 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,295 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,296 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,297 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,298 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,299 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,300 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,301 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,303 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,304 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,305 INFO L442 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 37 treesize of output 36 [2019-02-28 10:27:56,305 INFO L315 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-28 10:27:56,319 INFO L315 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:27:56,333 INFO L315 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:27:56,347 INFO L315 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:27:56,361 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:27:56,375 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:27:56,389 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:27:56,418 INFO L315 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-28 10:27:56,418 INFO L209 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-02-28 10:27:56,445 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,445 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,446 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,447 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,448 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,449 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,450 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,451 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,452 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,453 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,454 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,455 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,456 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,458 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,459 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,460 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,461 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,462 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,463 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,464 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,465 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,467 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2019-02-28 10:27:56,467 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:27:56,513 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:27:56,513 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:56 [2019-02-28 10:27:56,556 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,556 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,557 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,558 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,559 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,560 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,561 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,562 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,563 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,564 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,565 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,566 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,567 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,569 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,570 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,571 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,572 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,573 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,574 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,575 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,576 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:27:56,577 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 43 [2019-02-28 10:27:56,578 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-28 10:27:56,607 INFO L315 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-28 10:27:56,608 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-02-28 10:27:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:27:58,984 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-02-28 10:27:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:27:59,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-28 10:27:59,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-28 10:27:59,044 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-28 10:27:59,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-28 10:27:59,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-28 10:27:59,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-28 10:27:59,044 INFO L87 Difference]: Start difference. First operand 35 states and 155 transitions. Second operand 8 states. [2019-02-28 10:28:15,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-28 10:28:15,177 INFO L93 Difference]: Finished difference Result 67 states and 213 transitions. [2019-02-28 10:28:15,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-28 10:28:15,177 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-28 10:28:15,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-28 10:28:15,178 INFO L225 Difference]: With dead ends: 67 [2019-02-28 10:28:15,178 INFO L226 Difference]: Without dead ends: 65 [2019-02-28 10:28:15,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-28 10:28:15,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-02-28 10:28:15,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2019-02-28 10:28:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-02-28 10:28:15,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 178 transitions. [2019-02-28 10:28:15,188 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 178 transitions. Word has length 4 [2019-02-28 10:28:15,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-28 10:28:15,188 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 178 transitions. [2019-02-28 10:28:15,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-28 10:28:15,188 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 178 transitions. [2019-02-28 10:28:15,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-28 10:28:15,189 INFO L394 BasicCegarLoop]: Found error trace [2019-02-28 10:28:15,189 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-28 10:28:15,189 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-28 10:28:15,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:28:15,189 INFO L82 PathProgramCache]: Analyzing trace with hash 930312, now seen corresponding path program 1 times [2019-02-28 10:28:15,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-28 10:28:15,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:28:15,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:28:15,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-28 10:28:15,191 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-28 10:28:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:28:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-28 10:28:15,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:28:15,250 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-28 10:28:15,250 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-28 10:28:15,250 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [33] [2019-02-28 10:28:15,252 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-02-28 10:28:15,252 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-28 10:28:15,259 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-28 10:28:15,259 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-02-28 10:28:15,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-28 10:28:15,259 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-28 10:28:15,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-28 10:28:15,260 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:28:15,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-28 10:28:15,270 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-28 10:28:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-28 10:28:15,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 12 conjunts are in the unsatisfiable core [2019-02-28 10:28:15,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-02-28 10:28:15,283 INFO L442 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 24 treesize of output 27 [2019-02-28 10:28:15,294 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,295 INFO L442 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 27 treesize of output 29 [2019-02-28 10:28:15,299 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,300 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,315 INFO L442 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 34 [2019-02-28 10:28:15,318 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,319 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,320 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,323 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,333 INFO L442 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 36 [2019-02-28 10:28:15,336 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,337 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,338 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,340 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,341 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,343 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,346 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,356 INFO L442 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 2 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 38 [2019-02-28 10:28:15,367 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,367 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,368 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,369 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,371 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,372 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,373 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,376 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,377 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,379 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,382 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,383 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,397 INFO L442 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2019-02-28 10:28:15,403 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,404 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,405 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,406 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,407 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,408 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,409 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,411 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,412 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,414 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,416 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,417 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,419 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,421 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,423 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,425 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,426 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,438 INFO L442 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 1 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 39 [2019-02-28 10:28:15,439 INFO L315 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-28 10:28:15,454 INFO L315 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:28:15,470 INFO L315 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:28:15,484 INFO L315 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:28:15,501 INFO L315 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:28:15,517 INFO L315 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:28:15,532 INFO L315 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:28:15,575 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,576 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,577 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,578 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,582 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,583 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-02-28 10:28:15,583 INFO L315 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-02-28 10:28:15,612 INFO L315 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:28:15,616 INFO L315 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-28 10:28:15,646 INFO L315 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-28 10:28:15,646 INFO L209 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:68, output treesize:59 [2019-02-28 10:28:15,667 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,668 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,669 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,670 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,671 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,672 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,673 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,674 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,675 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,677 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,678 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,679 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,681 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,683 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,685 INFO L187 IndexEqualityManager]: detected not equals via solver [2019-02-28 10:28:15,721 INFO L442 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 46 treesize of output 69 [2019-02-28 10:28:15,725 INFO L315 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-02-28 10:28:15,874 INFO L315 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 26 dim-0 vars, and 5 xjuncts. [2019-02-28 10:28:15,875 INFO L209 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:69, output treesize:236 [2019-02-28 10:29:44,476 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-28 10:29:44,478 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 50215 column 7: Overflow encountered when expanding vector at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1420) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:221) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.push(DiffWrapperScript.java:93) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.push(WrapperScript.java:101) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.UndoableWrapperScript.push(UndoableWrapperScript.java:52) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:152) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:581) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:215) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-02-28 10:29:44,482 INFO L168 Benchmark]: Toolchain (without parser) took 396431.68 ms. Allocated memory was 138.9 MB in the beginning and 302.0 MB in the end (delta: 163.1 MB). Free memory was 108.1 MB in the beginning and 184.1 MB in the end (delta: -76.0 MB). Peak memory consumption was 87.0 MB. Max. memory is 7.1 GB. [2019-02-28 10:29:44,483 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 138.9 MB. Free memory is still 109.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-02-28 10:29:44,483 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.31 ms. Allocated memory is still 138.9 MB. Free memory was 107.7 MB in the beginning and 105.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-02-28 10:29:44,483 INFO L168 Benchmark]: Boogie Preprocessor took 29.17 ms. Allocated memory is still 138.9 MB. Free memory was 105.6 MB in the beginning and 104.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-02-28 10:29:44,484 INFO L168 Benchmark]: RCFGBuilder took 633.10 ms. Allocated memory is still 138.9 MB. Free memory was 104.3 MB in the beginning and 91.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2019-02-28 10:29:44,484 INFO L168 Benchmark]: TraceAbstraction took 395702.35 ms. Allocated memory was 138.9 MB in the beginning and 302.0 MB in the end (delta: 163.1 MB). Free memory was 91.5 MB in the beginning and 184.1 MB in the end (delta: -92.6 MB). Peak memory consumption was 70.5 MB. Max. memory is 7.1 GB. [2019-02-28 10:29:44,486 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 138.9 MB. Free memory is still 109.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 63.31 ms. Allocated memory is still 138.9 MB. Free memory was 107.7 MB in the beginning and 105.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.17 ms. Allocated memory is still 138.9 MB. Free memory was 105.6 MB in the beginning and 104.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 633.10 ms. Allocated memory is still 138.9 MB. Free memory was 104.3 MB in the beginning and 91.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 395702.35 ms. Allocated memory was 138.9 MB in the beginning and 302.0 MB in the end (delta: 163.1 MB). Free memory was 91.5 MB in the beginning and 184.1 MB in the end (delta: -92.6 MB). Peak memory consumption was 70.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 50215 column 7: Overflow encountered when expanding vector de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 50215 column 7: Overflow encountered when expanding vector: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1420) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...