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-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-e1a14da [2018-12-24 13:59:50,735 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-24 13:59:50,737 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-24 13:59:50,753 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-24 13:59:50,754 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-24 13:59:50,758 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-24 13:59:50,759 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-24 13:59:50,761 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-24 13:59:50,763 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-24 13:59:50,771 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-24 13:59:50,772 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-24 13:59:50,813 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 [2018-12-24 13:59:50,841 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-24 13:59:50,842 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-24 13:59:50,843 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-24 13:59:50,843 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-24 13:59:50,843 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-24 13:59:50,843 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-24 13:59:50,843 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2018-12-24 13:59:50,844 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-24 13:59:50,844 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-24 13:59:50,844 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-24 13:59:50,844 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-24 13:59:50,844 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-24 13:59:50,845 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-24 13:59:50,845 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-24 13:59:50,846 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-24 13:59:50,847 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-24 13:59:50,848 INFO L133 SettingsManager]: * Use SBE=true [2018-12-24 13:59:50,848 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-24 13:59:50,849 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-24 13:59:50,849 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-24 13:59:50,849 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-24 13:59:50,849 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-24 13:59:50,849 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-24 13:59:50,851 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-24 13:59:50,851 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-24 13:59:50,851 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-24 13:59:50,851 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-24 13:59:50,852 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-24 13:59:50,852 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-24 13:59:50,852 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-24 13:59:50,852 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-24 13:59:50,853 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-24 13:59:50,854 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-24 13:59:50,854 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-24 13:59:50,854 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-24 13:59:50,854 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-24 13:59:50,855 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-24 13:59:50,855 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-24 13:59:50,855 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-24 13:59:50,855 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-24 13:59:50,904 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-24 13:59:50,918 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-24 13:59:50,924 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-24 13:59:50,926 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-24 13:59:50,927 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-24 13:59:50,928 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-unlimited.bpl [2018-12-24 13:59:50,928 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-unlimited.bpl' [2018-12-24 13:59:50,989 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-24 13:59:50,991 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-24 13:59:50,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-24 13:59:50,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-24 13:59:50,992 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-24 13:59:51,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:50" (1/1) ... [2018-12-24 13:59:51,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:50" (1/1) ... [2018-12-24 13:59:51,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-24 13:59:51,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-24 13:59:51,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-24 13:59:51,065 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-24 13:59:51,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:50" (1/1) ... [2018-12-24 13:59:51,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:50" (1/1) ... [2018-12-24 13:59:51,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:50" (1/1) ... [2018-12-24 13:59:51,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:50" (1/1) ... [2018-12-24 13:59:51,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:50" (1/1) ... [2018-12-24 13:59:51,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:50" (1/1) ... [2018-12-24 13:59:51,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:50" (1/1) ... [2018-12-24 13:59:51,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-24 13:59:51,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-24 13:59:51,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-24 13:59:51,102 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-24 13:59:51,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-24 13:59:51,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-24 13:59:51,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-24 13:59:51,527 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-24 13:59:51,528 INFO L280 CfgBuilder]: Removed 17 assue(true) statements. [2018-12-24 13:59:51,528 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 01:59:51 BoogieIcfgContainer [2018-12-24 13:59:51,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-24 13:59:51,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-24 13:59:51,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-24 13:59:51,538 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-24 13:59:51,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:50" (1/2) ... [2018-12-24 13:59:51,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37575b2d and model type speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 01:59:51, skipping insertion in model container [2018-12-24 13:59:51,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 01:59:51" (2/2) ... [2018-12-24 13:59:51,543 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-7-unlimited.bpl [2018-12-24 13:59:51,558 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-24 13:59:51,568 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-12-24 13:59:51,587 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2018-12-24 13:59:51,628 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-24 13:59:51,628 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-24 13:59:51,628 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-24 13:59:51,628 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-24 13:59:51,629 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-24 13:59:51,629 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-24 13:59:51,629 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-24 13:59:51,629 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-24 13:59:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2018-12-24 13:59:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-12-24 13:59:51,664 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:51,665 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2018-12-24 13:59:51,668 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:51,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:51,678 INFO L82 PathProgramCache]: Analyzing trace with hash 992, now seen corresponding path program 1 times [2018-12-24 13:59:51,681 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:51,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:51,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:51,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:51,732 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:51,904 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 13:59:51,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-24 13:59:51,905 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 13:59:51,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 13:59:51,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 13:59:51,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 13:59:51,929 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2018-12-24 13:59:52,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:52,125 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2018-12-24 13:59:52,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 13:59:52,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-12-24 13:59:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:52,145 INFO L225 Difference]: With dead ends: 33 [2018-12-24 13:59:52,146 INFO L226 Difference]: Without dead ends: 28 [2018-12-24 13:59:52,149 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 [2018-12-24 13:59:52,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-24 13:59:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2018-12-24 13:59:52,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-24 13:59:52,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 29 transitions. [2018-12-24 13:59:52,186 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 29 transitions. Word has length 2 [2018-12-24 13:59:52,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:52,188 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 29 transitions. [2018-12-24 13:59:52,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 13:59:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 29 transitions. [2018-12-24 13:59:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:52,189 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:52,189 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:52,190 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:52,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:52,190 INFO L82 PathProgramCache]: Analyzing trace with hash 30816, now seen corresponding path program 1 times [2018-12-24 13:59:52,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:52,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:52,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:52,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:52,192 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:52,244 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 13:59:52,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-24 13:59:52,245 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 13:59:52,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 13:59:52,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 13:59:52,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 13:59:52,249 INFO L87 Difference]: Start difference. First operand 16 states and 29 transitions. Second operand 3 states. [2018-12-24 13:59:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:52,562 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2018-12-24 13:59:52,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 13:59:52,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-24 13:59:52,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:52,564 INFO L225 Difference]: With dead ends: 28 [2018-12-24 13:59:52,564 INFO L226 Difference]: Without dead ends: 27 [2018-12-24 13:59:52,565 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 [2018-12-24 13:59:52,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-24 13:59:52,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2018-12-24 13:59:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-24 13:59:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 30 transitions. [2018-12-24 13:59:52,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 30 transitions. Word has length 3 [2018-12-24 13:59:52,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:52,571 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 30 transitions. [2018-12-24 13:59:52,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 13:59:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 30 transitions. [2018-12-24 13:59:52,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:52,571 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:52,572 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:52,572 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:52,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:52,573 INFO L82 PathProgramCache]: Analyzing trace with hash 30380, now seen corresponding path program 1 times [2018-12-24 13:59:52,573 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:52,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:52,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:52,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:52,574 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:52,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:52,681 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:52,682 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 13:59:52,684 INFO L207 CegarAbsIntRunner]: [0], [18], [31] [2018-12-24 13:59:52,720 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:52,720 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:52,804 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:52,806 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 2. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:52,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:52,813 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:52,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:52,814 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 [2018-12-24 13:59:52,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:52,835 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:52,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:52,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,972 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 13:59:53,141 WARN L181 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2018-12-24 13:59:53,188 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 13:59:53,357 WARN L181 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-12-24 13:59:53,376 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,380 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,384 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 13:59:53,497 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2018-12-24 13:59:53,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 13:59:54,054 WARN L181 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2018-12-24 13:59:54,068 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,076 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,077 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:54,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 13:59:54,098 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,153 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,202 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,246 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,293 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,380 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 13:59:54,391 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 13:59:54,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 13:59:54,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 13:59:54,436 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 13:59:54,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 13:59:54,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 13:59:54,469 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,544 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,711 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,757 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,787 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,806 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,823 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,977 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:54,978 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2018-12-24 13:59:55,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:55,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 13:59:55,122 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:55,281 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:55,281 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 13:59:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:55,347 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:55,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:55,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 13:59:55,433 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:55,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 13:59:55,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 13:59:55,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:55,435 INFO L87 Difference]: Start difference. First operand 17 states and 30 transitions. Second operand 6 states. [2018-12-24 13:59:55,689 WARN L181 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2018-12-24 13:59:56,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:56,005 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2018-12-24 13:59:56,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 13:59:56,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 13:59:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:56,008 INFO L225 Difference]: With dead ends: 54 [2018-12-24 13:59:56,008 INFO L226 Difference]: Without dead ends: 52 [2018-12-24 13:59:56,009 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 13:59:56,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-24 13:59:56,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 20. [2018-12-24 13:59:56,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-24 13:59:56,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 41 transitions. [2018-12-24 13:59:56,015 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 41 transitions. Word has length 3 [2018-12-24 13:59:56,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:56,016 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 41 transitions. [2018-12-24 13:59:56,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 13:59:56,016 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 41 transitions. [2018-12-24 13:59:56,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:56,016 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:56,016 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:56,017 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:56,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:56,017 INFO L82 PathProgramCache]: Analyzing trace with hash 30008, now seen corresponding path program 1 times [2018-12-24 13:59:56,017 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:56,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:56,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:56,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:56,019 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:56,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:56,092 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:56,092 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 13:59:56,093 INFO L207 CegarAbsIntRunner]: [0], [6], [31] [2018-12-24 13:59:56,095 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:56,095 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:56,104 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:56,104 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 2. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:56,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:56,105 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:56,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:56,105 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 [2018-12-24 13:59:56,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:56,114 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:56,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:56,168 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 13:59:56,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 13:59:56,182 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,184 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,185 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 13:59:56,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,249 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 13:59:56,299 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 75 [2018-12-24 13:59:56,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,353 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 13:59:56,392 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 13:59:56,393 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,440 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,507 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,539 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,573 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,591 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,609 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:56,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 13:59:56,691 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 13:59:56,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,743 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 13:59:56,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,812 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,813 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,815 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:56,820 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 13:59:56,983 WARN L181 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2018-12-24 13:59:57,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,004 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,010 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 13:59:57,014 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:57,043 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:57,070 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:57,096 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:57,137 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:57,187 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:57,187 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 8 variables, input treesize:95, output treesize:96 [2018-12-24 13:59:57,334 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,335 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 13:59:57,336 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:57,422 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:57,422 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 13:59:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:57,442 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:57,470 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 13:59:57,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2018-12-24 13:59:57,470 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 13:59:57,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 13:59:57,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 13:59:57,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 13:59:57,471 INFO L87 Difference]: Start difference. First operand 20 states and 41 transitions. Second operand 4 states. [2018-12-24 13:59:57,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:57,570 INFO L93 Difference]: Finished difference Result 25 states and 67 transitions. [2018-12-24 13:59:57,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 13:59:57,570 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-12-24 13:59:57,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:57,571 INFO L225 Difference]: With dead ends: 25 [2018-12-24 13:59:57,571 INFO L226 Difference]: Without dead ends: 24 [2018-12-24 13:59:57,571 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 13:59:57,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-24 13:59:57,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-12-24 13:59:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-24 13:59:57,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 66 transitions. [2018-12-24 13:59:57,578 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 66 transitions. Word has length 3 [2018-12-24 13:59:57,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:57,578 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 66 transitions. [2018-12-24 13:59:57,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 13:59:57,578 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 66 transitions. [2018-12-24 13:59:57,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:57,579 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:57,579 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:57,579 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:57,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:57,580 INFO L82 PathProgramCache]: Analyzing trace with hash 30132, now seen corresponding path program 1 times [2018-12-24 13:59:57,580 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:57,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:57,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:57,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:57,581 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:57,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:57,659 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:57,660 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 13:59:57,660 INFO L207 CegarAbsIntRunner]: [0], [10], [31] [2018-12-24 13:59:57,661 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:57,662 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:57,669 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:57,669 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 2. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:57,670 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:57,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:57,670 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 [2018-12-24 13:59:57,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:57,680 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:57,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:57,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 13:59:57,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 13:59:57,774 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,794 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 13:59:57,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,862 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 13:59:57,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,876 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,878 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 13:59:57,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,935 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:57,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 13:59:57,955 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 13:59:57,956 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,025 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,065 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,095 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,116 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,134 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,164 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 13:59:58,241 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 13:59:58,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,289 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,291 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 13:59:58,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,370 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,374 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 13:59:58,662 WARN L181 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2018-12-24 13:59:58,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,669 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 13:59:58,680 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,709 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,737 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,766 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,796 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:58,851 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:58,852 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2018-12-24 13:59:58,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:58,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 13:59:58,898 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,059 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 13:59:59,060 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 13:59:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:59,080 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:59,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:59,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 13:59:59,114 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:59,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 13:59:59,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 13:59:59,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:59,115 INFO L87 Difference]: Start difference. First operand 23 states and 66 transitions. Second operand 6 states. [2018-12-24 13:59:59,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:59,435 INFO L93 Difference]: Finished difference Result 57 states and 111 transitions. [2018-12-24 13:59:59,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 13:59:59,435 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 13:59:59,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:59,437 INFO L225 Difference]: With dead ends: 57 [2018-12-24 13:59:59,438 INFO L226 Difference]: Without dead ends: 56 [2018-12-24 13:59:59,439 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 13:59:59,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-24 13:59:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 25. [2018-12-24 13:59:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-24 13:59:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 82 transitions. [2018-12-24 13:59:59,448 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 82 transitions. Word has length 3 [2018-12-24 13:59:59,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:59,448 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 82 transitions. [2018-12-24 13:59:59,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 13:59:59,449 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 82 transitions. [2018-12-24 13:59:59,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:59,449 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:59,449 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:59,449 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:59,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:59,450 INFO L82 PathProgramCache]: Analyzing trace with hash 30628, now seen corresponding path program 1 times [2018-12-24 13:59:59,450 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:59,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:59,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:59,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:59,451 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 13:59:59,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:59,578 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:59,578 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 13:59:59,578 INFO L207 CegarAbsIntRunner]: [0], [26], [31] [2018-12-24 13:59:59,579 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:59,580 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:59,586 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:59,587 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 2. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:59,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:59,587 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:59,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:59,587 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 [2018-12-24 13:59:59,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:59,596 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:59,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:59,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 13:59:59,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 13:59:59,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 13:59:59,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,663 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 13:59:59,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 75 [2018-12-24 13:59:59,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 13:59:59,724 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 13:59:59,725 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,774 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,813 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,843 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,867 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,885 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,903 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:59,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:59,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:00,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:00,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,086 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,088 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,089 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:00,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,150 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:00,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,221 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:00,226 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,256 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,285 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,315 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,345 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,401 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:00,402 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2018-12-24 14:00:00,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:00,471 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:00:00,472 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:00,553 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:00,554 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:00,599 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:00,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:00,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:00:00,647 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:00,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:00:00,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:00:00,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:00:00,648 INFO L87 Difference]: Start difference. First operand 25 states and 82 transitions. Second operand 6 states. [2018-12-24 14:00:01,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:01,120 INFO L93 Difference]: Finished difference Result 59 states and 127 transitions. [2018-12-24 14:00:01,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:00:01,122 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:00:01,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:01,123 INFO L225 Difference]: With dead ends: 59 [2018-12-24 14:00:01,123 INFO L226 Difference]: Without dead ends: 57 [2018-12-24 14:00:01,126 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:00:01,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-24 14:00:01,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2018-12-24 14:00:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-24 14:00:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 101 transitions. [2018-12-24 14:00:01,138 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 101 transitions. Word has length 3 [2018-12-24 14:00:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:01,139 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 101 transitions. [2018-12-24 14:00:01,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:00:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 101 transitions. [2018-12-24 14:00:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:01,143 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:01,143 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:01,143 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:01,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:01,143 INFO L82 PathProgramCache]: Analyzing trace with hash 955362, now seen corresponding path program 1 times [2018-12-24 14:00:01,144 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:01,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:01,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:01,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:01,145 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:01,274 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:00:01,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-24 14:00:01,274 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:00:01,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:00:01,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:00:01,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-24 14:00:01,275 INFO L87 Difference]: Start difference. First operand 29 states and 101 transitions. Second operand 4 states. [2018-12-24 14:00:01,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:01,386 INFO L93 Difference]: Finished difference Result 37 states and 114 transitions. [2018-12-24 14:00:01,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:00:01,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-24 14:00:01,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:01,388 INFO L225 Difference]: With dead ends: 37 [2018-12-24 14:00:01,388 INFO L226 Difference]: Without dead ends: 36 [2018-12-24 14:00:01,388 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-24 14:00:01,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-24 14:00:01,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2018-12-24 14:00:01,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-24 14:00:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 111 transitions. [2018-12-24 14:00:01,397 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 111 transitions. Word has length 4 [2018-12-24 14:00:01,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:01,397 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 111 transitions. [2018-12-24 14:00:01,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:00:01,397 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 111 transitions. [2018-12-24 14:00:01,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:01,398 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:01,398 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:01,398 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:01,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:01,398 INFO L82 PathProgramCache]: Analyzing trace with hash 941844, now seen corresponding path program 1 times [2018-12-24 14:00:01,399 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:01,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:01,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:01,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:01,400 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:01,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:01,564 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:01,564 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:01,564 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [33] [2018-12-24 14:00:01,566 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:01,566 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:01,576 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:01,576 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:00:01,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:01,576 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:01,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:01,577 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 [2018-12-24 14:00:01,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:01,588 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:01,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:01,638 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:01,680 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,683 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:01,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,734 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,736 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:01,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,801 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:01,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:01,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:01,877 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,904 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,931 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,957 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:01,986 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:00:02,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:00:02,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:00:02,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:00:02,038 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:00:02,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 97 [2018-12-24 14:00:02,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:00:02,100 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,137 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,166 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,189 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,207 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,223 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,238 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,585 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:02,585 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2018-12-24 14:00:02,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:02,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:00:02,637 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:02,694 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:02,695 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:02,720 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:02,748 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 14:00:02,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2018-12-24 14:00:02,749 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:00:02,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:00:02,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:00:02,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:00:02,750 INFO L87 Difference]: Start difference. First operand 32 states and 111 transitions. Second operand 4 states. [2018-12-24 14:00:02,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:02,875 INFO L93 Difference]: Finished difference Result 36 states and 122 transitions. [2018-12-24 14:00:02,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:00:02,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-24 14:00:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:02,877 INFO L225 Difference]: With dead ends: 36 [2018-12-24 14:00:02,877 INFO L226 Difference]: Without dead ends: 35 [2018-12-24 14:00:02,878 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:00:02,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-24 14:00:02,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-12-24 14:00:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-24 14:00:02,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 121 transitions. [2018-12-24 14:00:02,885 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 121 transitions. Word has length 4 [2018-12-24 14:00:02,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:02,885 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 121 transitions. [2018-12-24 14:00:02,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:00:02,885 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 121 transitions. [2018-12-24 14:00:02,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:02,886 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:02,886 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:02,887 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:02,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:02,887 INFO L82 PathProgramCache]: Analyzing trace with hash 941532, now seen corresponding path program 1 times [2018-12-24 14:00:02,887 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:02,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:02,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:02,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:02,888 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:03,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:03,033 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:03,033 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:03,033 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [31] [2018-12-24 14:00:03,036 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:03,036 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:03,042 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:03,042 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:03,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:03,042 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:03,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:03,042 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 [2018-12-24 14:00:03,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:03,053 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:03,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:03,089 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:00:03,093 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:00:03,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:00:03,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 57 [2018-12-24 14:00:03,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:00:03,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,136 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,141 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 97 [2018-12-24 14:00:03,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:00:03,154 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,194 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,227 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,253 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,273 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,290 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,306 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,346 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:03,380 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,382 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:03,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:03,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,484 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,487 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:03,550 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,551 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,552 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:03,560 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,591 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,622 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,646 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,672 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,721 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:03,721 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:00:03,768 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:03,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:00:03,770 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:03,995 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:03,996 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:04,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:04,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2018-12-24 14:00:04,037 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:04,092 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:04,092 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2018-12-24 14:00:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:04,119 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:04,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:04,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:04,162 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:04,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:04,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:04,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:04,163 INFO L87 Difference]: Start difference. First operand 34 states and 121 transitions. Second operand 8 states. [2018-12-24 14:00:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:04,695 INFO L93 Difference]: Finished difference Result 79 states and 193 transitions. [2018-12-24 14:00:04,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:04,695 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:00:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:04,697 INFO L225 Difference]: With dead ends: 79 [2018-12-24 14:00:04,697 INFO L226 Difference]: Without dead ends: 77 [2018-12-24 14:00:04,698 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-12-24 14:00:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2018-12-24 14:00:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-24 14:00:04,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 150 transitions. [2018-12-24 14:00:04,707 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 150 transitions. Word has length 4 [2018-12-24 14:00:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:04,707 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 150 transitions. [2018-12-24 14:00:04,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 150 transitions. [2018-12-24 14:00:04,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:04,708 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:04,708 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:04,708 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:04,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:04,709 INFO L82 PathProgramCache]: Analyzing trace with hash 941160, now seen corresponding path program 1 times [2018-12-24 14:00:04,709 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:04,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:04,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:04,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:04,710 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:05,009 WARN L181 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-12-24 14:00:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:05,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:05,216 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:05,216 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:05,216 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [31] [2018-12-24 14:00:05,217 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:05,218 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:05,230 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:05,230 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:05,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:05,231 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:05,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:05,231 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 [2018-12-24 14:00:05,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:05,248 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:05,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:05,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2018-12-24 14:00:05,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:00:05,372 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,374 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,375 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:00:05,382 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,384 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,386 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,387 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:00:05,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,399 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:00:05,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,414 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:00:05,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:00:05,432 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,476 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,507 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,533 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,553 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,570 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,586 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:05,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:05,707 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,710 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:05,761 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,768 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:05,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,838 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,843 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:05,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:05,846 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,873 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,898 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,925 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:05,951 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:06,000 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:06,001 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:00:06,439 WARN L181 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2018-12-24 14:00:06,451 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,453 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:00:06,454 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:06,496 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:06,497 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:06,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,533 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:06,535 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:06,537 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2018-12-24 14:00:06,538 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:06,597 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:06,597 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2018-12-24 14:00:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:06,625 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:06,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:06,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:06,667 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:06,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:06,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:06,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:06,668 INFO L87 Difference]: Start difference. First operand 41 states and 150 transitions. Second operand 8 states. [2018-12-24 14:00:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:07,152 INFO L93 Difference]: Finished difference Result 74 states and 192 transitions. [2018-12-24 14:00:07,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:07,153 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:00:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:07,154 INFO L225 Difference]: With dead ends: 74 [2018-12-24 14:00:07,154 INFO L226 Difference]: Without dead ends: 73 [2018-12-24 14:00:07,155 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:07,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-24 14:00:07,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2018-12-24 14:00:07,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-24 14:00:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 150 transitions. [2018-12-24 14:00:07,165 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 150 transitions. Word has length 4 [2018-12-24 14:00:07,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:07,165 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 150 transitions. [2018-12-24 14:00:07,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 150 transitions. [2018-12-24 14:00:07,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:07,166 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:07,166 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:07,167 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:07,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:07,167 INFO L82 PathProgramCache]: Analyzing trace with hash 941656, now seen corresponding path program 1 times [2018-12-24 14:00:07,167 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:07,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:07,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:07,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:07,168 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:07,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:07,309 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:07,309 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:07,309 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [31] [2018-12-24 14:00:07,310 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:07,311 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:07,315 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:07,316 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:07,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:07,316 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:07,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:07,317 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 [2018-12-24 14:00:07,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:07,330 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:07,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:07,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:07,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:07,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:07,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:07,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,643 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,645 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:07,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:07,653 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,699 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,800 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,902 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:07,998 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:00:08,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:00:08,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:00:08,043 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:00:08,045 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:00:08,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:00:08,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:00:08,125 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,160 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,189 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,212 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,232 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,251 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,264 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,374 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:08,374 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:00:08,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:00:08,482 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,595 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:08,596 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:08,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,638 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:08,639 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:08,641 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2018-12-24 14:00:08,642 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:08,757 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:08,757 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2018-12-24 14:00:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:08,782 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:08,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:08,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:08,824 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:08,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:08,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:08,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:08,826 INFO L87 Difference]: Start difference. First operand 41 states and 150 transitions. Second operand 8 states. [2018-12-24 14:00:09,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:09,306 INFO L93 Difference]: Finished difference Result 74 states and 192 transitions. [2018-12-24 14:00:09,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:09,306 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:00:09,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:09,307 INFO L225 Difference]: With dead ends: 74 [2018-12-24 14:00:09,307 INFO L226 Difference]: Without dead ends: 72 [2018-12-24 14:00:09,307 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:00:09,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-12-24 14:00:09,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2018-12-24 14:00:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-24 14:00:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 149 transitions. [2018-12-24 14:00:09,316 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 149 transitions. Word has length 4 [2018-12-24 14:00:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:09,316 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 149 transitions. [2018-12-24 14:00:09,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 149 transitions. [2018-12-24 14:00:09,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:09,317 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:09,317 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:09,317 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:09,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:09,318 INFO L82 PathProgramCache]: Analyzing trace with hash 941718, now seen corresponding path program 1 times [2018-12-24 14:00:09,318 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:09,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:09,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:09,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:09,319 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:09,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:09,455 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:09,455 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:09,455 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [31] [2018-12-24 14:00:09,456 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:09,457 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:09,461 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:09,461 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:09,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:09,462 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:09,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:09,462 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 [2018-12-24 14:00:09,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:09,474 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:09,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:09,684 WARN L181 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-24 14:00:09,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:00:09,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:00:09,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,780 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:00:09,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,791 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:00:09,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,801 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:00:09,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,812 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:09,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 97 [2018-12-24 14:00:09,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:00:09,874 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,915 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,947 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,973 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:09,994 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:10,009 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:10,023 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:10,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,058 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:10,094 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,095 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:10,141 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,146 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:10,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:10,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,286 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,289 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:10,291 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:10,318 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:10,343 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:10,368 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:10,394 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:10,443 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:10,443 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:00:10,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,493 INFO L478 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 100 [2018-12-24 14:00:10,495 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:00:10,647 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2018-12-24 14:00:10,648 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:106, output treesize:150 [2018-12-24 14:00:10,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,699 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,721 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,721 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:10,722 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 97 [2018-12-24 14:00:10,723 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:10,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:10,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 142 [2018-12-24 14:00:10,942 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 32 xjuncts. [2018-12-24 14:00:11,657 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 36 dim-0 vars, and 7 xjuncts. [2018-12-24 14:00:11,658 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:172, output treesize:455 [2018-12-24 14:00:21,567 WARN L181 SmtUtils]: Spent 9.76 s on a formula simplification. DAG size of input: 264 DAG size of output: 121 [2018-12-24 14:00:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:21,568 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:21,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:21,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:00:21,625 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:21,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:21,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:21,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:00:21,626 INFO L87 Difference]: Start difference. First operand 40 states and 149 transitions. Second operand 8 states. [2018-12-24 14:00:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:31,474 INFO L93 Difference]: Finished difference Result 79 states and 233 transitions. [2018-12-24 14:00:31,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:00:31,474 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:00:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:31,476 INFO L225 Difference]: With dead ends: 79 [2018-12-24 14:00:31,476 INFO L226 Difference]: Without dead ends: 71 [2018-12-24 14:00:31,477 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-24 14:00:31,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2018-12-24 14:00:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-24 14:00:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 177 transitions. [2018-12-24 14:00:31,487 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 177 transitions. Word has length 4 [2018-12-24 14:00:31,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:31,487 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 177 transitions. [2018-12-24 14:00:31,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:31,487 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 177 transitions. [2018-12-24 14:00:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:31,488 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:31,488 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:31,488 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:31,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:31,488 INFO L82 PathProgramCache]: Analyzing trace with hash 930312, now seen corresponding path program 1 times [2018-12-24 14:00:31,489 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:31,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:31,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:31,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:31,490 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:00:31,725 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:00:31,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-24 14:00:31,725 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:00:31,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:00:31,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:00:31,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-24 14:00:31,726 INFO L87 Difference]: Start difference. First operand 41 states and 177 transitions. Second operand 4 states. [2018-12-24 14:00:32,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:32,308 INFO L93 Difference]: Finished difference Result 53 states and 195 transitions. [2018-12-24 14:00:32,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:00:32,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-24 14:00:32,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:32,309 INFO L225 Difference]: With dead ends: 53 [2018-12-24 14:00:32,309 INFO L226 Difference]: Without dead ends: 52 [2018-12-24 14:00:32,310 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-24 14:00:32,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-24 14:00:32,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2018-12-24 14:00:32,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-24 14:00:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 186 transitions. [2018-12-24 14:00:32,324 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 186 transitions. Word has length 4 [2018-12-24 14:00:32,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:32,324 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 186 transitions. [2018-12-24 14:00:32,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:00:32,326 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 186 transitions. [2018-12-24 14:00:32,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:32,327 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:32,327 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:32,327 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:32,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:32,329 INFO L82 PathProgramCache]: Analyzing trace with hash 929876, now seen corresponding path program 1 times [2018-12-24 14:00:32,329 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:32,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:32,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:32,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:32,330 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:32,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:32,420 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:32,421 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:32,421 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [31] [2018-12-24 14:00:32,422 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:32,422 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:32,428 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:32,429 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:32,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:32,429 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:32,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:32,429 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 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 [2018-12-24 14:00:32,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:32,438 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:32,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:32,500 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:32,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:32,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:32,645 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,651 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:32,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,718 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,720 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:32,725 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:32,726 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,754 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,780 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,806 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,833 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:00:32,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:00:32,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:00:32,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:00:32,884 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:00:32,887 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 97 [2018-12-24 14:00:32,896 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:00:32,897 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,936 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,964 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:32,988 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:33,008 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:33,025 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:33,040 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:33,093 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:33,094 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2018-12-24 14:00:33,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:00:33,149 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:33,205 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:33,205 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:33,234 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,235 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,240 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:33,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:00:33,245 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:33,298 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:33,299 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2018-12-24 14:00:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:33,318 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:33,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:33,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:00:33,362 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:33,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:33,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:33,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:00:33,363 INFO L87 Difference]: Start difference. First operand 43 states and 186 transitions. Second operand 8 states. [2018-12-24 14:00:33,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:33,980 INFO L93 Difference]: Finished difference Result 87 states and 278 transitions. [2018-12-24 14:00:33,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:00:33,980 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:00:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:33,982 INFO L225 Difference]: With dead ends: 87 [2018-12-24 14:00:33,982 INFO L226 Difference]: Without dead ends: 85 [2018-12-24 14:00:33,982 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:33,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-12-24 14:00:33,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 41. [2018-12-24 14:00:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-24 14:00:33,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 149 transitions. [2018-12-24 14:00:33,994 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 149 transitions. Word has length 4 [2018-12-24 14:00:33,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:33,994 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 149 transitions. [2018-12-24 14:00:33,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:33,994 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 149 transitions. [2018-12-24 14:00:33,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:33,995 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:33,995 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:33,995 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:33,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:33,996 INFO L82 PathProgramCache]: Analyzing trace with hash 945688, now seen corresponding path program 1 times [2018-12-24 14:00:33,996 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:33,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:33,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:33,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:33,997 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:34,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:34,032 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:34,032 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:34,032 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [33] [2018-12-24 14:00:34,034 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:34,034 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:34,040 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:34,040 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:00:34,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:34,043 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:34,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:34,043 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 [2018-12-24 14:00:34,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:34,052 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:34,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:34,093 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:00:34,097 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:00:34,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:00:34,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 57 [2018-12-24 14:00:34,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,139 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 75 [2018-12-24 14:00:34,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:00:34,195 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:00:34,197 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,259 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,288 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,313 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,333 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,347 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,363 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,399 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:34,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:34,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:34,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:34,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:34,661 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,686 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,710 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,735 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,760 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,806 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:34,806 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2018-12-24 14:00:34,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:34,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:00:34,842 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:34,882 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:34,882 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:34,900 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:34,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:34,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:00:34,962 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:34,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:00:34,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:00:34,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:00:34,963 INFO L87 Difference]: Start difference. First operand 41 states and 149 transitions. Second operand 6 states. [2018-12-24 14:00:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:35,354 INFO L93 Difference]: Finished difference Result 64 states and 185 transitions. [2018-12-24 14:00:35,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:00:35,355 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 14:00:35,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:35,356 INFO L225 Difference]: With dead ends: 64 [2018-12-24 14:00:35,356 INFO L226 Difference]: Without dead ends: 63 [2018-12-24 14:00:35,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:00:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-24 14:00:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2018-12-24 14:00:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-24 14:00:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 157 transitions. [2018-12-24 14:00:35,367 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 157 transitions. Word has length 4 [2018-12-24 14:00:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:35,367 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 157 transitions. [2018-12-24 14:00:35,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:00:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 157 transitions. [2018-12-24 14:00:35,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:35,368 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:35,368 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:35,368 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:35,368 INFO L82 PathProgramCache]: Analyzing trace with hash 945004, now seen corresponding path program 1 times [2018-12-24 14:00:35,369 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:35,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:35,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:35,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:35,370 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:35,573 WARN L181 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2018-12-24 14:00:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:35,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:35,598 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:35,598 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:35,598 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [31] [2018-12-24 14:00:35,600 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:35,600 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:35,604 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:35,604 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:35,605 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:35,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:35,605 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:35,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:35,615 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:35,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:35,644 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:00:35,648 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:00:35,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,654 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:00:35,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:00:35,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:00:35,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,759 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,790 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:00:35,799 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:00:35,800 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,839 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,868 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,893 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,912 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,927 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,942 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:35,977 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:35,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:36,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,014 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:36,053 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,055 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,057 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:36,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:36,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,177 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:36,181 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,204 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,228 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,253 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,278 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,332 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:36,333 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:00:36,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,393 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:00:36,393 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,436 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:36,436 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:36,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:36,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:00:36,469 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:36,516 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:36,516 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2018-12-24 14:00:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:36,537 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:36,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:36,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:00:36,571 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:36,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:36,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:36,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:00:36,571 INFO L87 Difference]: Start difference. First operand 42 states and 157 transitions. Second operand 8 states. [2018-12-24 14:00:37,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:37,474 INFO L93 Difference]: Finished difference Result 98 states and 268 transitions. [2018-12-24 14:00:37,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:00:37,475 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:00:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:37,476 INFO L225 Difference]: With dead ends: 98 [2018-12-24 14:00:37,477 INFO L226 Difference]: Without dead ends: 97 [2018-12-24 14:00:37,477 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:00:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-12-24 14:00:37,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 47. [2018-12-24 14:00:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-24 14:00:37,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 197 transitions. [2018-12-24 14:00:37,488 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 197 transitions. Word has length 4 [2018-12-24 14:00:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:37,489 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 197 transitions. [2018-12-24 14:00:37,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:37,489 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 197 transitions. [2018-12-24 14:00:37,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:37,490 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:37,490 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:37,490 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:37,490 INFO L82 PathProgramCache]: Analyzing trace with hash 945500, now seen corresponding path program 1 times [2018-12-24 14:00:37,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:37,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:37,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:37,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:37,491 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:37,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:37,555 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:37,556 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:37,556 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [31] [2018-12-24 14:00:37,557 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:37,557 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:37,561 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:37,561 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:37,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:37,561 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:37,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:37,562 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:37,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:37,574 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:37,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:37,609 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2018-12-24 14:00:37,617 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 33 [2018-12-24 14:00:37,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,625 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:00:37,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,629 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:00:37,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,689 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,692 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:00:37,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,699 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:37,701 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:00:37,833 INFO L303 Elim1Store]: Index analysis took 129 ms [2018-12-24 14:00:37,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:00:37,835 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,045 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,077 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,102 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,122 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,137 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,153 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,188 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,189 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:38,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:38,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,274 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:38,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,327 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,328 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:38,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,397 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:38,398 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,430 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,459 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,486 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,519 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,564 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:38,564 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:00:38,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:00:38,608 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,651 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:38,651 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:38,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,680 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,685 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:00:38,686 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,732 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:38,733 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2018-12-24 14:00:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:38,756 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:38,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:38,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:38,805 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:38,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:38,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:38,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:38,805 INFO L87 Difference]: Start difference. First operand 47 states and 197 transitions. Second operand 8 states. [2018-12-24 14:00:39,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:39,198 INFO L93 Difference]: Finished difference Result 91 states and 282 transitions. [2018-12-24 14:00:39,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:39,199 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:00:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:39,200 INFO L225 Difference]: With dead ends: 91 [2018-12-24 14:00:39,200 INFO L226 Difference]: Without dead ends: 89 [2018-12-24 14:00:39,201 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:39,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-12-24 14:00:39,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2018-12-24 14:00:39,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-24 14:00:39,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 243 transitions. [2018-12-24 14:00:39,215 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 243 transitions. Word has length 4 [2018-12-24 14:00:39,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:39,215 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 243 transitions. [2018-12-24 14:00:39,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:39,215 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 243 transitions. [2018-12-24 14:00:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:39,216 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:39,216 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:39,216 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:39,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:39,216 INFO L82 PathProgramCache]: Analyzing trace with hash 933968, now seen corresponding path program 1 times [2018-12-24 14:00:39,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:39,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:39,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:39,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:39,217 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:39,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:39,323 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:39,323 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:39,323 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [31] [2018-12-24 14:00:39,324 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:39,324 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:39,328 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:39,329 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:39,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:39,329 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:39,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:39,329 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:39,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:39,339 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:39,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:39,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:39,785 WARN L181 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2018-12-24 14:00:39,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:40,341 WARN L181 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-12-24 14:00:40,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:40,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:40,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:40,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:40,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:41,043 WARN L181 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2018-12-24 14:00:41,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,088 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,136 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,187 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:41,188 INFO L303 Elim1Store]: Index analysis took 143 ms [2018-12-24 14:00:41,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:41,959 WARN L181 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2018-12-24 14:00:41,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,038 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:42,038 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,063 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,089 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,115 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,141 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:00:42,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:00:42,185 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:00:42,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:00:42,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:00:42,195 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:00:42,202 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:00:42,203 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,240 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,268 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,290 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,308 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,323 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,336 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,383 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:42,383 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:00:42,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,436 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:00:42,437 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,484 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:42,484 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:00:42,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,510 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:42,514 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:42,516 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2018-12-24 14:00:42,516 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:42,562 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:42,562 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:61 [2018-12-24 14:00:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:42,580 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:42,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:42,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:00:42,620 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:42,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:42,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:42,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:00:42,621 INFO L87 Difference]: Start difference. First operand 56 states and 243 transitions. Second operand 8 states. [2018-12-24 14:00:42,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:42,998 INFO L93 Difference]: Finished difference Result 92 states and 291 transitions. [2018-12-24 14:00:42,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:00:42,999 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:00:42,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:43,000 INFO L225 Difference]: With dead ends: 92 [2018-12-24 14:00:43,000 INFO L226 Difference]: Without dead ends: 90 [2018-12-24 14:00:43,001 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:00:43,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-12-24 14:00:43,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 59. [2018-12-24 14:00:43,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-24 14:00:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 254 transitions. [2018-12-24 14:00:43,028 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 254 transitions. Word has length 4 [2018-12-24 14:00:43,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:43,029 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 254 transitions. [2018-12-24 14:00:43,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:00:43,029 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 254 transitions. [2018-12-24 14:00:43,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:43,029 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:43,030 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:43,030 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:43,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:43,030 INFO L82 PathProgramCache]: Analyzing trace with hash 949406, now seen corresponding path program 1 times [2018-12-24 14:00:43,030 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:43,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:43,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:43,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:43,031 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:43,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:43,153 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:43,154 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:43,154 INFO L207 CegarAbsIntRunner]: [0], [26], [28], [31] [2018-12-24 14:00:43,155 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:43,155 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:43,159 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:43,160 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:00:43,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:43,160 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:43,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:43,160 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:00:43,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:43,170 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:43,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:43,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:00:43,249 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:00:43,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,254 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:00:43,257 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,258 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 57 [2018-12-24 14:00:43,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 75 [2018-12-24 14:00:43,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,286 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:00:43,322 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:00:43,323 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,362 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,392 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,414 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,453 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,469 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,483 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:00:43,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,556 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:00:43,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,599 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:00:43,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:00:43,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,718 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,720 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,721 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,721 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:00:43,722 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,747 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,771 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,796 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,821 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:43,867 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:00:43,868 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:00:43,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:43,947 INFO L478 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 106 [2018-12-24 14:00:43,948 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:00:44,103 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2018-12-24 14:00:44,103 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:106, output treesize:150 [2018-12-24 14:00:44,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,162 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:44,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 142 [2018-12-24 14:00:44,479 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2018-12-24 14:00:45,387 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:45,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:45,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:45,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:45,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:45,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:45,393 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:00:45,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 97 [2018-12-24 14:00:45,395 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:45,638 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 36 dim-0 vars, and 7 xjuncts. [2018-12-24 14:00:45,639 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:172, output treesize:455 [2018-12-24 14:00:46,455 WARN L181 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 121 [2018-12-24 14:00:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:46,457 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:00:46,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:46,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:00:46,506 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:46,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:00:46,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:00:46,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:00:46,507 INFO L87 Difference]: Start difference. First operand 59 states and 254 transitions. Second operand 8 states. [2018-12-24 14:01:01,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:01,573 INFO L93 Difference]: Finished difference Result 101 states and 344 transitions. [2018-12-24 14:01:01,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:01,574 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:01:01,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:01,575 INFO L225 Difference]: With dead ends: 101 [2018-12-24 14:01:01,575 INFO L226 Difference]: Without dead ends: 100 [2018-12-24 14:01:01,576 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-12-24 14:01:01,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 63. [2018-12-24 14:01:01,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-24 14:01:01,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 286 transitions. [2018-12-24 14:01:01,590 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 286 transitions. Word has length 4 [2018-12-24 14:01:01,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:01,590 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 286 transitions. [2018-12-24 14:01:01,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:01,590 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 286 transitions. [2018-12-24 14:01:01,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:01,591 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:01,591 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:01,591 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:01,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:01,592 INFO L82 PathProgramCache]: Analyzing trace with hash 951454, now seen corresponding path program 1 times [2018-12-24 14:01:01,592 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:01,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:01,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:01,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:01,593 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:01,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:01,651 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:01,652 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:01,652 INFO L207 CegarAbsIntRunner]: [0], [28], [32], [33] [2018-12-24 14:01:01,653 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:01,653 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:01,658 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:01,658 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:01:01,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:01,658 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:01,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:01,658 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:01,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:01,672 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:01,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:01,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,710 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:01,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:01,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:01,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,876 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:01,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:01,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:02,075 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,077 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,087 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:02,092 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,136 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,183 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,230 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,276 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,324 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:02,386 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:02,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:02,393 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:02,399 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:02,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:02,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2018-12-24 14:01:02,406 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,455 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,483 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,505 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,521 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,536 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,549 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,613 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:02,614 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 7 variables, input treesize:118, output treesize:120 [2018-12-24 14:01:02,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2018-12-24 14:01:02,636 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,708 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:02,708 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2018-12-24 14:01:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:02,758 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:02,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:02,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:01:02,786 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:02,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:01:02,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:01:02,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:01:02,787 INFO L87 Difference]: Start difference. First operand 63 states and 286 transitions. Second operand 6 states. [2018-12-24 14:01:03,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:03,005 INFO L93 Difference]: Finished difference Result 86 states and 322 transitions. [2018-12-24 14:01:03,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:01:03,005 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 14:01:03,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:03,007 INFO L225 Difference]: With dead ends: 86 [2018-12-24 14:01:03,007 INFO L226 Difference]: Without dead ends: 85 [2018-12-24 14:01:03,008 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:01:03,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-12-24 14:01:03,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 64. [2018-12-24 14:01:03,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-24 14:01:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 294 transitions. [2018-12-24 14:01:03,022 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 294 transitions. Word has length 4 [2018-12-24 14:01:03,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:03,022 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 294 transitions. [2018-12-24 14:01:03,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:01:03,022 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 294 transitions. [2018-12-24 14:01:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:03,023 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:03,023 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:03,023 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:03,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:03,023 INFO L82 PathProgramCache]: Analyzing trace with hash 951266, now seen corresponding path program 2 times [2018-12-24 14:01:03,024 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:03,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:03,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:03,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:03,025 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:03,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:03,109 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:03,109 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:01:03,109 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:01:03,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:03,109 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:03,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:01:03,119 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:01:03,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-24 14:01:03,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:01:03,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:03,233 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:03,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:03,241 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 43 [2018-12-24 14:01:03,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 57 [2018-12-24 14:01:03,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,283 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:03,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,290 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,291 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,292 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:03,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,306 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,307 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 120 [2018-12-24 14:01:03,308 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,360 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,392 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,417 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,437 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,453 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,467 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,510 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,510 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:03,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:03,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:03,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,666 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:03,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,759 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,761 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,761 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:03,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:03,874 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,039 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,081 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,125 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,169 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,213 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,287 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:04,287 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2018-12-24 14:01:04,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,323 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2018-12-24 14:01:04,324 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,408 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:04,408 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:01:04,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:04,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2018-12-24 14:01:04,475 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:04,552 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:04,552 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2018-12-24 14:01:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:04,575 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:04,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:04,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:01:04,609 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:04,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:04,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:04,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:01:04,610 INFO L87 Difference]: Start difference. First operand 64 states and 294 transitions. Second operand 8 states. [2018-12-24 14:01:05,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:05,165 INFO L93 Difference]: Finished difference Result 119 states and 384 transitions. [2018-12-24 14:01:05,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:01:05,166 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:01:05,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:05,168 INFO L225 Difference]: With dead ends: 119 [2018-12-24 14:01:05,168 INFO L226 Difference]: Without dead ends: 115 [2018-12-24 14:01:05,168 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-12-24 14:01:05,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 67. [2018-12-24 14:01:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-24 14:01:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 286 transitions. [2018-12-24 14:01:05,189 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 286 transitions. Word has length 4 [2018-12-24 14:01:05,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:05,190 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 286 transitions. [2018-12-24 14:01:05,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:05,190 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 286 transitions. [2018-12-24 14:01:05,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:05,190 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:05,190 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:05,191 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:05,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:05,191 INFO L82 PathProgramCache]: Analyzing trace with hash 938000, now seen corresponding path program 1 times [2018-12-24 14:01:05,191 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:05,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:05,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:01:05,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:05,192 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:05,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:05,260 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:05,260 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:05,260 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [33] [2018-12-24 14:01:05,262 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:05,262 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:05,266 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:05,267 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 2. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:01:05,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:05,267 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:05,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:05,267 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:05,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:05,280 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:05,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:05,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:05,332 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:05,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,371 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,372 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:05,375 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,377 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,379 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,379 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:05,384 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,385 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,387 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 75 [2018-12-24 14:01:05,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:05,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:05,416 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,454 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,485 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,508 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,528 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,543 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,558 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:05,629 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,630 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:05,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,675 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:05,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,727 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:05,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:05,797 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,821 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,845 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,870 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,895 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:05,941 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:05,941 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:05,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:05,989 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:01:05,990 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:06,033 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:06,033 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:06,071 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:06,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:06,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:01:06,099 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:06,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:01:06,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:01:06,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:01:06,099 INFO L87 Difference]: Start difference. First operand 67 states and 286 transitions. Second operand 6 states. [2018-12-24 14:01:07,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:07,077 INFO L93 Difference]: Finished difference Result 90 states and 322 transitions. [2018-12-24 14:01:07,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:01:07,080 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 14:01:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:07,081 INFO L225 Difference]: With dead ends: 90 [2018-12-24 14:01:07,081 INFO L226 Difference]: Without dead ends: 89 [2018-12-24 14:01:07,081 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:01:07,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-12-24 14:01:07,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2018-12-24 14:01:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-24 14:01:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 294 transitions. [2018-12-24 14:01:07,100 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 294 transitions. Word has length 4 [2018-12-24 14:01:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:07,100 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 294 transitions. [2018-12-24 14:01:07,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:01:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 294 transitions. [2018-12-24 14:01:07,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:07,102 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:07,102 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:07,102 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:07,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:07,103 INFO L82 PathProgramCache]: Analyzing trace with hash 29197230, now seen corresponding path program 1 times [2018-12-24 14:01:07,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:07,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:07,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:07,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:07,104 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:07,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:07,279 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:07,279 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:07,279 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [34], [35] [2018-12-24 14:01:07,280 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:07,280 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:07,284 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:07,284 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:01:07,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:07,284 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:07,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:07,285 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:07,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:07,305 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:07,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:07,334 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,335 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 63 [2018-12-24 14:01:07,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 48 [2018-12-24 14:01:07,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2018-12-24 14:01:07,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 72 [2018-12-24 14:01:07,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2018-12-24 14:01:07,470 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,489 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,511 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,534 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,558 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:07,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:07,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2018-12-24 14:01:07,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 49 [2018-12-24 14:01:07,612 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2018-12-24 14:01:07,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 89 [2018-12-24 14:01:07,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 88 [2018-12-24 14:01:07,629 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,660 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,685 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,703 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,718 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,732 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,745 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,784 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:07,784 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:84, output treesize:88 [2018-12-24 14:01:07,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:07,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 83 [2018-12-24 14:01:07,830 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:07,867 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:07,867 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:93, output treesize:63 [2018-12-24 14:01:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:07,888 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:07,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:07,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 6 [2018-12-24 14:01:07,916 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:07,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-24 14:01:07,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-24 14:01:07,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:01:07,916 INFO L87 Difference]: Start difference. First operand 68 states and 294 transitions. Second operand 7 states. [2018-12-24 14:01:08,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:08,203 INFO L93 Difference]: Finished difference Result 77 states and 308 transitions. [2018-12-24 14:01:08,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:01:08,210 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2018-12-24 14:01:08,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:08,211 INFO L225 Difference]: With dead ends: 77 [2018-12-24 14:01:08,211 INFO L226 Difference]: Without dead ends: 76 [2018-12-24 14:01:08,211 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:01:08,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-12-24 14:01:08,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2018-12-24 14:01:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-24 14:01:08,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 301 transitions. [2018-12-24 14:01:08,229 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 301 transitions. Word has length 5 [2018-12-24 14:01:08,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:08,229 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 301 transitions. [2018-12-24 14:01:08,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-24 14:01:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 301 transitions. [2018-12-24 14:01:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:08,230 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:08,230 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:08,230 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:08,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:08,230 INFO L82 PathProgramCache]: Analyzing trace with hash 29172180, now seen corresponding path program 1 times [2018-12-24 14:01:08,231 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:08,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:08,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:08,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:08,232 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:08,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:08,353 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:08,353 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:08,354 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [33] [2018-12-24 14:01:08,355 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:08,355 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:08,357 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:08,358 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:08,358 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:08,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:08,358 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:08,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:08,368 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:08,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:08,500 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-24 14:01:08,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:08,505 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:08,510 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,512 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:08,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:08,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,526 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:08,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,537 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:08,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:08,547 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:08,585 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:08,616 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:08,640 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:08,659 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:08,676 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:08,691 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:08,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:08,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,768 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:08,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:08,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,866 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:08,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,927 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:08,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:08,934 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:08,964 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:08,993 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,018 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,043 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:09,090 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:09,090 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:11,138 WARN L181 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2018-12-24 14:01:11,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:01:11,145 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,185 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:11,186 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:11,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:11,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:01:11,219 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:11,264 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:11,264 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2018-12-24 14:01:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:11,284 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:11,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:11,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:11,325 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:11,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:11,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:11,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:11,326 INFO L87 Difference]: Start difference. First operand 69 states and 301 transitions. Second operand 8 states. [2018-12-24 14:01:11,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:11,765 INFO L93 Difference]: Finished difference Result 102 states and 353 transitions. [2018-12-24 14:01:11,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:11,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:01:11,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:11,767 INFO L225 Difference]: With dead ends: 102 [2018-12-24 14:01:11,767 INFO L226 Difference]: Without dead ends: 101 [2018-12-24 14:01:11,767 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:11,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-12-24 14:01:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2018-12-24 14:01:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-12-24 14:01:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 317 transitions. [2018-12-24 14:01:11,791 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 317 transitions. Word has length 5 [2018-12-24 14:01:11,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:11,791 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 317 transitions. [2018-12-24 14:01:11,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:11,791 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 317 transitions. [2018-12-24 14:01:11,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:11,792 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:11,792 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:11,792 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:11,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:11,792 INFO L82 PathProgramCache]: Analyzing trace with hash 29171496, now seen corresponding path program 1 times [2018-12-24 14:01:11,792 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:11,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:11,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:11,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:11,793 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:11,945 WARN L181 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-12-24 14:01:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:11,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:11,983 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:11,983 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:11,983 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [31] [2018-12-24 14:01:11,984 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:11,984 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:11,987 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:11,988 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:11,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:11,988 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:11,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:11,988 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:11,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:11,997 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:12,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:12,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:12,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,066 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:12,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,146 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:12,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:12,263 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,268 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:12,272 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,298 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,324 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,350 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,376 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:12,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:12,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:12,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:12,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:12,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:12,465 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:12,465 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,501 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,530 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,552 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,569 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,583 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,596 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,642 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:12,642 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:12,691 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,692 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:01:12,692 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,733 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:12,733 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:12,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,759 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,761 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,764 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:01:12,765 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,820 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:12,821 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2018-12-24 14:01:12,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,849 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,851 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,852 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,852 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:12,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:12,854 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:01:12,855 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:12,904 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:12,904 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2018-12-24 14:01:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:12,922 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:12,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:12,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:01:12,966 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:12,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:12,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:12,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:12,967 INFO L87 Difference]: Start difference. First operand 71 states and 317 transitions. Second operand 10 states. [2018-12-24 14:01:14,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:14,474 INFO L93 Difference]: Finished difference Result 147 states and 540 transitions. [2018-12-24 14:01:14,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:01:14,475 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:01:14,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:14,476 INFO L225 Difference]: With dead ends: 147 [2018-12-24 14:01:14,477 INFO L226 Difference]: Without dead ends: 146 [2018-12-24 14:01:14,477 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:14,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-12-24 14:01:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 89. [2018-12-24 14:01:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-24 14:01:14,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 464 transitions. [2018-12-24 14:01:14,509 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 464 transitions. Word has length 5 [2018-12-24 14:01:14,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:14,509 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 464 transitions. [2018-12-24 14:01:14,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 464 transitions. [2018-12-24 14:01:14,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:14,510 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:14,510 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:14,510 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:14,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:14,511 INFO L82 PathProgramCache]: Analyzing trace with hash 29187556, now seen corresponding path program 1 times [2018-12-24 14:01:14,511 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:14,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:14,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:14,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:14,512 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:14,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:14,666 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:14,666 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:14,666 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [33] [2018-12-24 14:01:14,667 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:14,667 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:14,672 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:14,672 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:14,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:14,672 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:14,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:14,673 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:14,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:14,683 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:14,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:14,708 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:14,710 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:14,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:14,721 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,724 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:14,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,731 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:14,737 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:14,752 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:14,752 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,791 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,823 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,847 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,865 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,880 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,895 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:14,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:14,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:14,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:15,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,007 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:15,055 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:15,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,126 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,128 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:15,129 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,154 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,178 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,203 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,227 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,274 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:15,274 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:15,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:01:15,311 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,351 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:15,351 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:15,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,443 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:15,508 INFO L303 Elim1Store]: Index analysis took 134 ms [2018-12-24 14:01:15,509 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2018-12-24 14:01:15,509 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:15,548 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:15,549 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2018-12-24 14:01:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:15,570 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:15,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:15,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:15,610 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:15,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:15,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:15,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:15,610 INFO L87 Difference]: Start difference. First operand 89 states and 464 transitions. Second operand 8 states. [2018-12-24 14:01:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:16,009 INFO L93 Difference]: Finished difference Result 128 states and 531 transitions. [2018-12-24 14:01:16,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:16,009 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:01:16,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:16,011 INFO L225 Difference]: With dead ends: 128 [2018-12-24 14:01:16,011 INFO L226 Difference]: Without dead ends: 127 [2018-12-24 14:01:16,012 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:16,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-12-24 14:01:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2018-12-24 14:01:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-24 14:01:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 488 transitions. [2018-12-24 14:01:16,047 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 488 transitions. Word has length 5 [2018-12-24 14:01:16,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:16,048 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 488 transitions. [2018-12-24 14:01:16,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 488 transitions. [2018-12-24 14:01:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:16,049 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:16,049 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:16,049 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:16,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:16,049 INFO L82 PathProgramCache]: Analyzing trace with hash 29187368, now seen corresponding path program 1 times [2018-12-24 14:01:16,049 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:16,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:16,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:16,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:16,050 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:16,211 WARN L181 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2018-12-24 14:01:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:16,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:16,246 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:16,246 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:16,247 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [26], [31] [2018-12-24 14:01:16,249 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:16,249 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:16,251 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:16,252 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:16,252 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:16,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:16,253 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:16,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:16,261 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:16,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:16,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:16,292 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 33 [2018-12-24 14:01:16,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,297 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,297 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:16,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,303 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:16,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:16,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,327 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,328 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:16,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:16,338 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:16,377 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:16,409 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:16,433 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:16,452 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:16,468 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:16,484 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:16,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:16,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,556 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:16,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:16,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:16,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,711 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,716 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:16,717 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:16,741 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:16,765 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:16,789 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:16,814 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:16,860 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:16,860 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:16,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:16,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:01:16,958 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,008 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:17,008 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:17,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,043 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,045 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2018-12-24 14:01:17,046 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,089 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:17,089 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2018-12-24 14:01:17,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,126 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:17,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:17,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:01:17,128 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:17,175 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:17,176 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2018-12-24 14:01:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:17,217 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:17,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:17,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:01:17,273 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:17,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:17,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:17,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:17,273 INFO L87 Difference]: Start difference. First operand 92 states and 488 transitions. Second operand 10 states. [2018-12-24 14:01:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:17,968 INFO L93 Difference]: Finished difference Result 146 states and 591 transitions. [2018-12-24 14:01:17,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:17,969 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:01:17,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:17,971 INFO L225 Difference]: With dead ends: 146 [2018-12-24 14:01:17,971 INFO L226 Difference]: Without dead ends: 144 [2018-12-24 14:01:17,973 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:01:17,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-12-24 14:01:18,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 98. [2018-12-24 14:01:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-12-24 14:01:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 536 transitions. [2018-12-24 14:01:18,017 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 536 transitions. Word has length 5 [2018-12-24 14:01:18,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:18,017 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 536 transitions. [2018-12-24 14:01:18,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:18,017 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 536 transitions. [2018-12-24 14:01:18,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:18,018 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:18,018 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:18,018 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:18,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:18,019 INFO L82 PathProgramCache]: Analyzing trace with hash 29175836, now seen corresponding path program 1 times [2018-12-24 14:01:18,019 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:18,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:18,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:18,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:18,020 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:18,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:18,181 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:18,181 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:18,181 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [26], [31] [2018-12-24 14:01:18,183 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:18,183 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:18,185 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:18,186 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:18,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:18,186 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:18,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:18,186 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:18,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:18,197 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:18,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:18,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:18,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 33 [2018-12-24 14:01:18,232 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,233 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,233 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:18,237 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,237 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:18,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,244 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,248 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,249 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:18,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,254 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,255 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,256 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,257 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:18,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:18,267 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:18,307 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:18,336 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:18,361 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:18,380 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:18,395 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:18,410 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:18,444 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:18,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:18,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,526 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:18,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,576 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,578 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:18,640 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,680 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,680 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,682 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:18,682 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:18,707 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:18,732 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:18,756 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:18,781 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:18,827 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:18,828 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:18,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,891 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:01:18,891 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:18,932 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:18,933 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:18,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:18,966 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:18,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2018-12-24 14:01:18,968 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,017 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:19,017 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2018-12-24 14:01:19,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,043 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,051 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:19,051 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:19,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 108 [2018-12-24 14:01:19,053 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:19,096 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:19,096 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:57 [2018-12-24 14:01:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:19,121 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:19,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:19,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:01:19,193 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:19,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:19,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:19,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:19,194 INFO L87 Difference]: Start difference. First operand 98 states and 536 transitions. Second operand 10 states. [2018-12-24 14:01:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:20,160 INFO L93 Difference]: Finished difference Result 140 states and 582 transitions. [2018-12-24 14:01:20,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:20,161 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:01:20,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:20,163 INFO L225 Difference]: With dead ends: 140 [2018-12-24 14:01:20,163 INFO L226 Difference]: Without dead ends: 138 [2018-12-24 14:01:20,163 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:01:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-12-24 14:01:20,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 92. [2018-12-24 14:01:20,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-24 14:01:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 486 transitions. [2018-12-24 14:01:20,208 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 486 transitions. Word has length 5 [2018-12-24 14:01:20,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:20,208 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 486 transitions. [2018-12-24 14:01:20,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:20,208 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 486 transitions. [2018-12-24 14:01:20,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:20,208 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:20,209 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:20,209 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:20,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:20,209 INFO L82 PathProgramCache]: Analyzing trace with hash 29191274, now seen corresponding path program 1 times [2018-12-24 14:01:20,209 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:20,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:20,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:20,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:20,210 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:20,413 WARN L181 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 17 [2018-12-24 14:01:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:20,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:20,464 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:20,464 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:20,464 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [28], [31] [2018-12-24 14:01:20,465 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:20,465 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:20,467 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:20,467 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:20,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:20,468 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:20,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:20,468 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:20,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:20,480 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:20,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:20,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,512 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:20,552 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:20,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:20,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,668 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:20,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,731 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,733 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,734 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,735 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,736 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:20,737 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:20,738 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,763 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,788 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,814 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,840 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:20,875 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:20,878 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:20,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:20,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:20,887 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 97 [2018-12-24 14:01:20,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:20,908 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,954 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:20,982 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,004 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,021 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,035 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,048 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,094 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:21,095 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:21,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,139 INFO L478 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 100 [2018-12-24 14:01:21,140 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:01:21,288 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:01:21,288 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:106, output treesize:150 [2018-12-24 14:01:21,342 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,342 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,347 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:21,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 112 [2018-12-24 14:01:21,348 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:21,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,451 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,462 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:21,471 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 131 [2018-12-24 14:01:21,472 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-12-24 14:01:21,677 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 13 dim-0 vars, and 3 xjuncts. [2018-12-24 14:01:21,677 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:172, output treesize:185 [2018-12-24 14:01:21,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,817 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:21,846 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 78 treesize of output 136 [2018-12-24 14:01:21,851 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2018-12-24 14:01:22,292 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:22,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:22,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:22,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:22,297 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:22,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:22,299 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:22,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:22,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:22,302 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:22,303 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 105 [2018-12-24 14:01:22,303 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:22,499 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 31 dim-0 vars, and 6 xjuncts. [2018-12-24 14:01:22,499 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:152, output treesize:346 [2018-12-24 14:01:23,272 WARN L181 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 109 [2018-12-24 14:01:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:23,274 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:23,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:23,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:01:23,340 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:23,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:23,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:23,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:23,340 INFO L87 Difference]: Start difference. First operand 92 states and 486 transitions. Second operand 10 states. [2018-12-24 14:01:24,248 WARN L181 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 89 [2018-12-24 14:01:25,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:25,787 INFO L93 Difference]: Finished difference Result 155 states and 683 transitions. [2018-12-24 14:01:25,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:01:25,788 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:01:25,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:25,789 INFO L225 Difference]: With dead ends: 155 [2018-12-24 14:01:25,790 INFO L226 Difference]: Without dead ends: 154 [2018-12-24 14:01:25,790 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:01:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-12-24 14:01:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 98. [2018-12-24 14:01:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-12-24 14:01:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 534 transitions. [2018-12-24 14:01:25,826 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 534 transitions. Word has length 5 [2018-12-24 14:01:25,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:25,827 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 534 transitions. [2018-12-24 14:01:25,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:25,827 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 534 transitions. [2018-12-24 14:01:25,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:25,827 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:25,828 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:25,828 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:25,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:25,828 INFO L82 PathProgramCache]: Analyzing trace with hash 29193322, now seen corresponding path program 1 times [2018-12-24 14:01:25,828 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:25,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:25,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:25,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:25,829 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:26,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:26,153 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:26,153 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:26,153 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [32], [33] [2018-12-24 14:01:26,154 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:26,154 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:26,156 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:26,156 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:26,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:26,156 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:26,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:26,157 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:26,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:26,174 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:26,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:26,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:26,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:26,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:26,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:26,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,564 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,688 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,701 INFO L303 Elim1Store]: Index analysis took 199 ms [2018-12-24 14:01:26,702 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:26,847 WARN L181 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2018-12-24 14:01:26,852 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,852 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,857 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:26,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:26,861 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,899 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,938 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:26,977 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,017 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,058 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:27,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:27,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:27,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:27,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:27,123 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:27,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2018-12-24 14:01:27,126 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,176 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,204 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,226 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,244 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,258 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,272 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,335 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:27,336 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2018-12-24 14:01:27,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2018-12-24 14:01:27,362 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,423 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:27,424 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:01:27,447 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,451 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:27,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2018-12-24 14:01:27,457 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:27,522 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:27,522 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2018-12-24 14:01:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:27,552 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:27,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:27,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:27,592 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:27,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:27,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:27,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:27,592 INFO L87 Difference]: Start difference. First operand 98 states and 534 transitions. Second operand 8 states. [2018-12-24 14:01:28,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:28,169 INFO L93 Difference]: Finished difference Result 137 states and 601 transitions. [2018-12-24 14:01:28,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:28,170 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:01:28,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:28,172 INFO L225 Difference]: With dead ends: 137 [2018-12-24 14:01:28,172 INFO L226 Difference]: Without dead ends: 132 [2018-12-24 14:01:28,172 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:28,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-12-24 14:01:28,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 100. [2018-12-24 14:01:28,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-12-24 14:01:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 556 transitions. [2018-12-24 14:01:28,218 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 556 transitions. Word has length 5 [2018-12-24 14:01:28,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:28,219 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 556 transitions. [2018-12-24 14:01:28,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:28,219 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 556 transitions. [2018-12-24 14:01:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:28,219 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:28,219 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:28,220 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:28,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:28,220 INFO L82 PathProgramCache]: Analyzing trace with hash 29193134, now seen corresponding path program 2 times [2018-12-24 14:01:28,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:28,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:28,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:28,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:28,221 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:28,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:28,286 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:28,286 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:01:28,286 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:01:28,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:28,286 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:28,295 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:01:28,295 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:01:28,302 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:01:28,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:01:28,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:28,329 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,330 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:28,372 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,374 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:28,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:28,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:28,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:28,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:28,661 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:28,662 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,699 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,737 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,777 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,817 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,866 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:28,917 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:28,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:28,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:28,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:28,928 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:28,952 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:28,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2018-12-24 14:01:28,965 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:29,026 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:29,054 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:29,076 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:29,093 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:29,107 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:29,121 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:29,184 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:29,185 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2018-12-24 14:01:29,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2018-12-24 14:01:29,219 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:29,280 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:29,280 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2018-12-24 14:01:29,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2018-12-24 14:01:29,322 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:29,387 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:29,387 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:108, output treesize:78 [2018-12-24 14:01:29,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,429 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:29,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:29,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 151 [2018-12-24 14:01:29,432 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:29,497 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:29,497 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:88, output treesize:64 [2018-12-24 14:01:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:29,522 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:29,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:29,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:01:29,580 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:29,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:29,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:29,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:29,580 INFO L87 Difference]: Start difference. First operand 100 states and 556 transitions. Second operand 10 states. [2018-12-24 14:01:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:30,300 INFO L93 Difference]: Finished difference Result 154 states and 681 transitions. [2018-12-24 14:01:30,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:30,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:01:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:30,302 INFO L225 Difference]: With dead ends: 154 [2018-12-24 14:01:30,302 INFO L226 Difference]: Without dead ends: 152 [2018-12-24 14:01:30,303 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:01:30,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-12-24 14:01:30,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 109. [2018-12-24 14:01:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-12-24 14:01:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 628 transitions. [2018-12-24 14:01:30,351 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 628 transitions. Word has length 5 [2018-12-24 14:01:30,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:30,351 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 628 transitions. [2018-12-24 14:01:30,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:30,351 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 628 transitions. [2018-12-24 14:01:30,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:30,352 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:30,352 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:30,352 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:30,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:30,353 INFO L82 PathProgramCache]: Analyzing trace with hash 29179868, now seen corresponding path program 1 times [2018-12-24 14:01:30,353 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:30,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:30,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:01:30,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:30,354 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:30,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:30,410 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:30,410 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:30,410 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [32], [33] [2018-12-24 14:01:30,411 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:30,411 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:30,413 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:30,413 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:30,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:30,414 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:30,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:30,414 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:30,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:30,424 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:30,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:30,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,454 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:30,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:30,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,533 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,535 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:30,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:30,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:30,658 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:30,658 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:30,684 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:30,709 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:30,735 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:30,761 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:30,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:30,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:30,802 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:30,804 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:30,807 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:30,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 97 [2018-12-24 14:01:30,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:30,818 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:30,853 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:30,881 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:30,902 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:30,918 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:30,931 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:30,944 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:30,989 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:30,990 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:31,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:01:31,035 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:31,076 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:31,076 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:31,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:01:31,107 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:31,150 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:31,151 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2018-12-24 14:01:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:31,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:31,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:31,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:31,212 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:31,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:31,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:31,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:31,213 INFO L87 Difference]: Start difference. First operand 109 states and 628 transitions. Second operand 8 states. [2018-12-24 14:01:31,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:31,642 INFO L93 Difference]: Finished difference Result 140 states and 686 transitions. [2018-12-24 14:01:31,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:31,643 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:01:31,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:31,645 INFO L225 Difference]: With dead ends: 140 [2018-12-24 14:01:31,645 INFO L226 Difference]: Without dead ends: 139 [2018-12-24 14:01:31,647 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-12-24 14:01:31,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2018-12-24 14:01:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-12-24 14:01:31,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 652 transitions. [2018-12-24 14:01:31,708 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 652 transitions. Word has length 5 [2018-12-24 14:01:31,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:31,708 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 652 transitions. [2018-12-24 14:01:31,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 652 transitions. [2018-12-24 14:01:31,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:31,708 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:31,709 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:31,709 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:31,709 INFO L82 PathProgramCache]: Analyzing trace with hash 29179680, now seen corresponding path program 1 times [2018-12-24 14:01:31,709 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:31,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:31,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:31,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:31,710 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:31,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:31,881 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:31,881 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:31,881 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [26], [31] [2018-12-24 14:01:31,882 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:31,882 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:31,884 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:31,884 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:31,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:31,885 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:31,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:31,885 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:31,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:31,902 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:31,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:31,939 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:31,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:31,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,947 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:31,952 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,955 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:31,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:31,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:31,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:31,986 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:31,986 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,024 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,055 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,177 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,196 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,211 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,226 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,261 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:32,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,297 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:32,338 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:32,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,399 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:32,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,465 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:32,465 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,490 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,514 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,539 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,564 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,610 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:32,610 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:32,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:01:32,671 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,711 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:32,711 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:32,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,781 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:01:32,787 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,832 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:32,833 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2018-12-24 14:01:32,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,869 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:32,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:32,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:01:32,871 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:32,919 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:32,920 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2018-12-24 14:01:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:32,943 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:33,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:33,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:01:33,002 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:33,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:33,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:33,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:33,002 INFO L87 Difference]: Start difference. First operand 112 states and 652 transitions. Second operand 10 states. [2018-12-24 14:01:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:33,671 INFO L93 Difference]: Finished difference Result 161 states and 770 transitions. [2018-12-24 14:01:33,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:33,672 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:01:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:33,674 INFO L225 Difference]: With dead ends: 161 [2018-12-24 14:01:33,674 INFO L226 Difference]: Without dead ends: 159 [2018-12-24 14:01:33,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:01:33,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-12-24 14:01:33,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 121. [2018-12-24 14:01:33,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-12-24 14:01:33,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 724 transitions. [2018-12-24 14:01:33,747 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 724 transitions. Word has length 5 [2018-12-24 14:01:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:33,748 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 724 transitions. [2018-12-24 14:01:33,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:33,748 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 724 transitions. [2018-12-24 14:01:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:33,749 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:33,749 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:33,749 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:33,749 INFO L82 PathProgramCache]: Analyzing trace with hash 28830064, now seen corresponding path program 1 times [2018-12-24 14:01:33,749 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:33,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:33,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:33,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:33,750 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:33,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:33,962 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:33,962 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:33,963 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [32], [33] [2018-12-24 14:01:33,964 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:33,964 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:33,969 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:33,969 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:33,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:33,969 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:33,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:33,969 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:33,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:33,978 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:33,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:34,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,010 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:34,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:34,091 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,093 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,095 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,097 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:34,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:34,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,219 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,221 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:34,228 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,264 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,297 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,337 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,374 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:34,424 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:34,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:34,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:34,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:34,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 97 [2018-12-24 14:01:34,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:34,455 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,491 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,519 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,544 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,561 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,576 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,589 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,635 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:34,636 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:34,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:01:34,679 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,722 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:34,722 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:34,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,812 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,813 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,815 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:34,816 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:34,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2018-12-24 14:01:34,817 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:34,859 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:34,859 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:59 [2018-12-24 14:01:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:34,884 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:34,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:34,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:34,924 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:34,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:34,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:34,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:34,925 INFO L87 Difference]: Start difference. First operand 121 states and 724 transitions. Second operand 8 states. [2018-12-24 14:01:35,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:35,321 INFO L93 Difference]: Finished difference Result 156 states and 773 transitions. [2018-12-24 14:01:35,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:35,321 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:01:35,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:35,324 INFO L225 Difference]: With dead ends: 156 [2018-12-24 14:01:35,324 INFO L226 Difference]: Without dead ends: 154 [2018-12-24 14:01:35,324 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-12-24 14:01:35,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 123. [2018-12-24 14:01:35,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-12-24 14:01:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 733 transitions. [2018-12-24 14:01:35,379 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 733 transitions. Word has length 5 [2018-12-24 14:01:35,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:35,379 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 733 transitions. [2018-12-24 14:01:35,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:35,379 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 733 transitions. [2018-12-24 14:01:35,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:35,380 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:35,380 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:35,380 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:35,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:35,381 INFO L82 PathProgramCache]: Analyzing trace with hash 28818532, now seen corresponding path program 1 times [2018-12-24 14:01:35,381 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:35,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:35,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:35,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:35,381 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:35,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:35,505 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:35,505 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:35,505 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [32], [33] [2018-12-24 14:01:35,507 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:35,507 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:35,510 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:35,510 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:35,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:35,510 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:35,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:35,511 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:35,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:35,519 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:35,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:35,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:35,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:35,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,623 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,625 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,626 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:35,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:35,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:35,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:35,747 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,773 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,797 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,823 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,849 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:35,885 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:35,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:35,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:35,892 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:35,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:35,905 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:35,905 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,941 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,968 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:35,990 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:36,007 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:36,022 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:36,035 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:36,081 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:36,081 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:38,143 WARN L181 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2018-12-24 14:01:38,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,149 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:01:38,149 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,191 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:38,191 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:38,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,330 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,377 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:38,390 INFO L303 Elim1Store]: Index analysis took 183 ms [2018-12-24 14:01:38,391 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:01:38,392 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:38,606 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:38,606 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2018-12-24 14:01:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:38,622 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:38,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:38,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:01:38,651 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:38,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:38,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:38,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:01:38,652 INFO L87 Difference]: Start difference. First operand 123 states and 733 transitions. Second operand 8 states. [2018-12-24 14:01:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:38,977 INFO L93 Difference]: Finished difference Result 168 states and 891 transitions. [2018-12-24 14:01:38,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:38,977 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:01:38,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:38,979 INFO L225 Difference]: With dead ends: 168 [2018-12-24 14:01:38,979 INFO L226 Difference]: Without dead ends: 167 [2018-12-24 14:01:38,980 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:38,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-12-24 14:01:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 139. [2018-12-24 14:01:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-12-24 14:01:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 865 transitions. [2018-12-24 14:01:39,045 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 865 transitions. Word has length 5 [2018-12-24 14:01:39,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:39,045 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 865 transitions. [2018-12-24 14:01:39,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 865 transitions. [2018-12-24 14:01:39,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:39,046 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:39,046 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:39,046 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:39,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:39,046 INFO L82 PathProgramCache]: Analyzing trace with hash 28818344, now seen corresponding path program 1 times [2018-12-24 14:01:39,046 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:39,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:39,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:39,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:39,047 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:39,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:39,221 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:39,221 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:39,221 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [26], [31] [2018-12-24 14:01:39,224 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:39,224 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:39,228 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:39,228 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:39,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:39,228 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:39,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:39,228 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:39,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:39,236 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:39,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:39,269 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2018-12-24 14:01:39,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 33 [2018-12-24 14:01:39,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:39,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:39,290 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,291 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:39,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,305 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:39,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:39,315 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:39,354 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:39,384 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:39,408 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:39,427 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:39,442 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:39,457 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:39,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:39,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:39,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,571 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:39,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,622 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,625 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,625 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:39,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,688 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,689 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:39,695 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:39,720 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:39,744 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:39,769 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:39,794 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:39,840 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:39,840 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:39,892 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:01:39,893 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:39,934 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:39,934 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:39,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:39,960 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:01:39,961 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:40,008 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:40,008 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2018-12-24 14:01:40,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,043 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:40,046 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:40,047 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 134 [2018-12-24 14:01:40,047 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:40,096 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:40,097 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2018-12-24 14:01:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:40,117 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:40,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:40,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:01:40,165 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:40,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:40,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:40,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:40,166 INFO L87 Difference]: Start difference. First operand 139 states and 865 transitions. Second operand 10 states. [2018-12-24 14:01:40,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:40,841 INFO L93 Difference]: Finished difference Result 242 states and 1262 transitions. [2018-12-24 14:01:40,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:01:40,841 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:01:40,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:40,844 INFO L225 Difference]: With dead ends: 242 [2018-12-24 14:01:40,844 INFO L226 Difference]: Without dead ends: 240 [2018-12-24 14:01:40,845 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:01:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-12-24 14:01:40,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 178. [2018-12-24 14:01:40,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-12-24 14:01:40,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 1177 transitions. [2018-12-24 14:01:40,928 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 1177 transitions. Word has length 5 [2018-12-24 14:01:40,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:40,928 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 1177 transitions. [2018-12-24 14:01:40,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:40,928 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 1177 transitions. [2018-12-24 14:01:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:40,929 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:40,929 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:40,929 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:40,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:40,929 INFO L82 PathProgramCache]: Analyzing trace with hash 28835830, now seen corresponding path program 1 times [2018-12-24 14:01:40,930 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:40,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:40,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:40,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:40,930 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:41,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:41,052 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:41,053 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:41,053 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [32], [33] [2018-12-24 14:01:41,054 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:41,054 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:41,056 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:41,057 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:41,057 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:41,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:41,058 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:41,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:41,066 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:41,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:41,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:41,113 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:41,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:41,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:41,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,135 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 75 [2018-12-24 14:01:41,141 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 97 [2018-12-24 14:01:41,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,154 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,156 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2018-12-24 14:01:41,158 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,214 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,246 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,271 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,291 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,309 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,324 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,365 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:41,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:41,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:41,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,520 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,523 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:41,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,599 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:41,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,688 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,689 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,691 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,695 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:41,696 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,734 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,784 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,821 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,859 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,897 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,961 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:41,961 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2018-12-24 14:01:41,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2018-12-24 14:01:41,990 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:42,053 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:42,053 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:01:42,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,086 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,087 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:42,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 134 [2018-12-24 14:01:42,088 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:42,151 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:42,152 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:80 [2018-12-24 14:01:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:42,175 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:42,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:42,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:42,215 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:42,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:42,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:42,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:42,216 INFO L87 Difference]: Start difference. First operand 178 states and 1177 transitions. Second operand 8 states. [2018-12-24 14:01:42,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:42,815 INFO L93 Difference]: Finished difference Result 211 states and 1231 transitions. [2018-12-24 14:01:42,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:42,816 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:01:42,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:42,819 INFO L225 Difference]: With dead ends: 211 [2018-12-24 14:01:42,819 INFO L226 Difference]: Without dead ends: 203 [2018-12-24 14:01:42,820 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:42,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-12-24 14:01:42,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 176. [2018-12-24 14:01:42,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-12-24 14:01:42,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 1188 transitions. [2018-12-24 14:01:42,932 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 1188 transitions. Word has length 5 [2018-12-24 14:01:42,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:42,932 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 1188 transitions. [2018-12-24 14:01:42,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:42,932 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 1188 transitions. [2018-12-24 14:01:42,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:42,933 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:42,933 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:42,934 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:42,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:42,934 INFO L82 PathProgramCache]: Analyzing trace with hash 28822376, now seen corresponding path program 1 times [2018-12-24 14:01:42,934 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:42,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:42,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:42,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:42,935 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:01:42,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:42,997 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:42,997 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:42,998 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [32], [33] [2018-12-24 14:01:42,998 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:42,999 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:43,001 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:43,001 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:43,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:43,002 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:43,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:43,002 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:43,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:43,011 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:43,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:43,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:43,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:43,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:43,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,051 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:43,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:43,066 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,068 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,069 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,070 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,071 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:43,082 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:43,082 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,121 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,153 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,176 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,196 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,210 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,225 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,261 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:43,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,296 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:43,334 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,335 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,337 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:43,386 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,387 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,393 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:43,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:43,478 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,503 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,527 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,551 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,576 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,622 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:43,622 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:43,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:01:43,694 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,736 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:43,737 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:43,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,768 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,769 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,770 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:43,771 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:43,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2018-12-24 14:01:43,772 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:43,815 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:43,816 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:59 [2018-12-24 14:01:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:43,837 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:43,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:43,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:43,876 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:43,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:43,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:43,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:43,877 INFO L87 Difference]: Start difference. First operand 176 states and 1188 transitions. Second operand 8 states. [2018-12-24 14:01:44,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:44,315 INFO L93 Difference]: Finished difference Result 201 states and 1233 transitions. [2018-12-24 14:01:44,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:44,316 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:01:44,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:44,319 INFO L225 Difference]: With dead ends: 201 [2018-12-24 14:01:44,319 INFO L226 Difference]: Without dead ends: 200 [2018-12-24 14:01:44,319 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:44,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-12-24 14:01:44,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 178. [2018-12-24 14:01:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-12-24 14:01:44,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 1204 transitions. [2018-12-24 14:01:44,403 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 1204 transitions. Word has length 5 [2018-12-24 14:01:44,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:44,403 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 1204 transitions. [2018-12-24 14:01:44,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:44,404 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 1204 transitions. [2018-12-24 14:01:44,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:44,404 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:44,405 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:44,405 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:44,405 INFO L82 PathProgramCache]: Analyzing trace with hash 29302192, now seen corresponding path program 1 times [2018-12-24 14:01:44,405 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:44,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:44,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:44,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:44,406 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:44,563 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-12-24 14:01:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:44,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:44,946 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:44,946 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:44,946 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [31] [2018-12-24 14:01:44,947 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:44,947 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:44,949 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:44,949 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:44,949 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:44,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:44,950 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:44,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:44,965 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:44,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:45,181 WARN L181 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-24 14:01:45,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2018-12-24 14:01:45,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 33 [2018-12-24 14:01:45,245 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,268 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:45,306 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,329 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,351 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 57 [2018-12-24 14:01:45,384 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,453 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:45,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,588 INFO L303 Elim1Store]: Index analysis took 133 ms [2018-12-24 14:01:45,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:45,744 INFO L303 Elim1Store]: Index analysis took 152 ms [2018-12-24 14:01:45,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:45,745 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:45,785 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:45,815 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:45,840 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:45,858 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:45,875 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:45,890 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:45,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:45,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:45,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,998 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:45,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,000 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:46,051 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,051 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,053 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,055 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:46,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:46,123 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,147 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,172 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,196 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,221 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,267 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:46,267 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:46,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:01:46,321 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,363 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:46,363 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:46,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,399 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:01:46,399 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,443 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:46,443 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2018-12-24 14:01:46,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,480 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:46,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:46,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:01:46,482 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:46,530 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:46,531 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2018-12-24 14:01:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:46,552 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:46,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:46,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:01:46,607 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:46,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:46,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:46,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:46,607 INFO L87 Difference]: Start difference. First operand 178 states and 1204 transitions. Second operand 10 states. [2018-12-24 14:01:47,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:47,360 INFO L93 Difference]: Finished difference Result 245 states and 1358 transitions. [2018-12-24 14:01:47,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:47,361 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:01:47,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:47,364 INFO L225 Difference]: With dead ends: 245 [2018-12-24 14:01:47,364 INFO L226 Difference]: Without dead ends: 243 [2018-12-24 14:01:47,365 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:01:47,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-12-24 14:01:47,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 191. [2018-12-24 14:01:47,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-12-24 14:01:47,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 1287 transitions. [2018-12-24 14:01:47,458 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 1287 transitions. Word has length 5 [2018-12-24 14:01:47,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:47,458 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 1287 transitions. [2018-12-24 14:01:47,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:47,459 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 1287 transitions. [2018-12-24 14:01:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:47,460 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:47,460 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:47,460 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:47,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:47,460 INFO L82 PathProgramCache]: Analyzing trace with hash 29295188, now seen corresponding path program 1 times [2018-12-24 14:01:47,460 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:47,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:47,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:47,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:47,461 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:47,613 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2018-12-24 14:01:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:47,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:47,625 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:47,625 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:47,625 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [32], [33] [2018-12-24 14:01:47,626 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:47,626 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:47,628 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:47,629 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:47,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:47,629 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:47,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:47,630 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:47,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:47,648 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:47,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:47,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:47,711 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,713 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:47,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:47,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:47,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,876 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:47,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:47,882 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,907 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,932 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,957 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:47,984 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:48,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:48,023 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:48,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:48,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:48,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:48,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:48,041 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,076 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,104 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,126 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,146 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,160 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,173 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,219 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:48,220 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:48,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:01:48,253 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,294 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:48,294 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:48,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:48,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:01:48,321 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:48,368 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:48,368 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2018-12-24 14:01:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:48,385 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:48,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:48,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2018-12-24 14:01:48,408 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:48,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:48,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:48,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:01:48,409 INFO L87 Difference]: Start difference. First operand 191 states and 1287 transitions. Second operand 8 states. [2018-12-24 14:01:48,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:48,779 INFO L93 Difference]: Finished difference Result 343 states and 2333 transitions. [2018-12-24 14:01:48,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:48,780 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:01:48,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:48,784 INFO L225 Difference]: With dead ends: 343 [2018-12-24 14:01:48,784 INFO L226 Difference]: Without dead ends: 342 [2018-12-24 14:01:48,784 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:01:48,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2018-12-24 14:01:48,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 304. [2018-12-24 14:01:48,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-12-24 14:01:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 2201 transitions. [2018-12-24 14:01:48,927 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 2201 transitions. Word has length 5 [2018-12-24 14:01:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:48,928 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 2201 transitions. [2018-12-24 14:01:48,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 2201 transitions. [2018-12-24 14:01:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:48,929 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:48,929 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:48,929 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:48,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:48,929 INFO L82 PathProgramCache]: Analyzing trace with hash 29295000, now seen corresponding path program 1 times [2018-12-24 14:01:48,930 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:48,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:48,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:48,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:48,931 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:49,321 WARN L181 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2018-12-24 14:01:49,598 WARN L181 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2018-12-24 14:01:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:49,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:49,613 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:49,613 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:49,614 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [26], [31] [2018-12-24 14:01:49,614 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:49,614 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:49,617 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:49,617 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:49,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:49,618 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:49,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:49,618 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:49,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:49,627 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:49,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:49,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:49,655 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:49,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:49,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,675 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:49,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,680 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,684 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:49,689 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,691 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:49,705 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:49,706 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:49,746 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:49,776 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:49,800 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:49,818 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:49,832 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:49,847 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:49,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,882 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:49,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:49,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:49,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:50,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:50,077 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:50,086 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,110 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,134 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,158 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,183 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,229 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:50,230 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:50,290 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:01:50,291 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,334 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:50,334 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:50,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,368 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:01:50,369 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,415 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:50,415 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2018-12-24 14:01:50,442 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,443 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,444 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,445 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,446 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,447 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,451 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:50,456 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:50,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 134 [2018-12-24 14:01:50,458 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:50,507 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:50,507 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2018-12-24 14:01:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:50,531 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:50,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:50,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:01:50,586 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:50,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:01:50,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:01:50,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:50,587 INFO L87 Difference]: Start difference. First operand 304 states and 2201 transitions. Second operand 10 states. [2018-12-24 14:01:52,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:52,369 INFO L93 Difference]: Finished difference Result 369 states and 2390 transitions. [2018-12-24 14:01:52,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:01:52,370 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:01:52,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:52,375 INFO L225 Difference]: With dead ends: 369 [2018-12-24 14:01:52,375 INFO L226 Difference]: Without dead ends: 367 [2018-12-24 14:01:52,375 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:01:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-12-24 14:01:52,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 320. [2018-12-24 14:01:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-12-24 14:01:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 2329 transitions. [2018-12-24 14:01:52,520 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 2329 transitions. Word has length 5 [2018-12-24 14:01:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:52,520 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 2329 transitions. [2018-12-24 14:01:52,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:01:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 2329 transitions. [2018-12-24 14:01:52,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:52,521 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:52,521 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:52,521 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:52,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:52,521 INFO L82 PathProgramCache]: Analyzing trace with hash 29312486, now seen corresponding path program 1 times [2018-12-24 14:01:52,521 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:52,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:52,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:52,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:52,522 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:52,904 WARN L181 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-12-24 14:01:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:52,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:52,916 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:52,916 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:52,916 INFO L207 CegarAbsIntRunner]: [0], [22], [28], [32], [33] [2018-12-24 14:01:52,917 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:52,917 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:52,919 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:52,919 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:52,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:52,920 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:52,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:52,920 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:52,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:52,930 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:52,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:52,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:52,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2018-12-24 14:01:53,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,010 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,011 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2018-12-24 14:01:53,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2018-12-24 14:01:53,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,128 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2018-12-24 14:01:53,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2018-12-24 14:01:53,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,299 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,306 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2018-12-24 14:01:53,313 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,359 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,405 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,451 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,497 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,548 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:53,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:53,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:53,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:53,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:53,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:53,624 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2018-12-24 14:01:53,625 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,691 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,718 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,740 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,757 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,771 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,785 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,849 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:53,849 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2018-12-24 14:01:53,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2018-12-24 14:01:53,880 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:53,944 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:53,944 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2018-12-24 14:01:53,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:53,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:54,025 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:54,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 134 [2018-12-24 14:01:54,026 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:54,087 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:54,087 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:80 [2018-12-24 14:01:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:54,128 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:54,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:54,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:54,173 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:54,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:54,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:54,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:54,174 INFO L87 Difference]: Start difference. First operand 320 states and 2329 transitions. Second operand 8 states. [2018-12-24 14:01:54,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:54,796 INFO L93 Difference]: Finished difference Result 354 states and 2377 transitions. [2018-12-24 14:01:54,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:54,796 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:01:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:54,802 INFO L225 Difference]: With dead ends: 354 [2018-12-24 14:01:54,802 INFO L226 Difference]: Without dead ends: 350 [2018-12-24 14:01:54,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-12-24 14:01:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 323. [2018-12-24 14:01:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-12-24 14:01:54,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 2346 transitions. [2018-12-24 14:01:54,943 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 2346 transitions. Word has length 5 [2018-12-24 14:01:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:54,943 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 2346 transitions. [2018-12-24 14:01:54,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:54,943 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 2346 transitions. [2018-12-24 14:01:54,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:54,944 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:54,944 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:54,945 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:54,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:54,945 INFO L82 PathProgramCache]: Analyzing trace with hash 29299032, now seen corresponding path program 1 times [2018-12-24 14:01:54,945 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:54,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:54,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:54,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:54,946 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:55,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:55,023 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:55,024 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:55,024 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [32], [33] [2018-12-24 14:01:55,025 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:55,025 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:55,027 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:55,027 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:55,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:55,028 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:55,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:55,028 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:55,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:55,046 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:55,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:55,076 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:55,079 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:55,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:55,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,091 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,092 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,093 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:55,097 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,098 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,101 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:55,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:55,123 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:55,123 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,162 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,195 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,218 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,236 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,252 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,267 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:55,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:55,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:55,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,461 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:55,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:55,530 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,555 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,579 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,603 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,628 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,675 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:55,675 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:55,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:01:55,717 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,759 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:55,760 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:55,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:55,790 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:55,791 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2018-12-24 14:01:55,791 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:55,835 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:55,836 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:59 [2018-12-24 14:01:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:55,856 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:55,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:55,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:55,895 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:55,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:55,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:55,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:55,896 INFO L87 Difference]: Start difference. First operand 323 states and 2346 transitions. Second operand 8 states. [2018-12-24 14:01:56,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:56,490 INFO L93 Difference]: Finished difference Result 347 states and 2375 transitions. [2018-12-24 14:01:56,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:56,490 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:01:56,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:56,494 INFO L225 Difference]: With dead ends: 347 [2018-12-24 14:01:56,494 INFO L226 Difference]: Without dead ends: 346 [2018-12-24 14:01:56,495 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:01:56,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2018-12-24 14:01:56,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 324. [2018-12-24 14:01:56,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-12-24 14:01:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 2354 transitions. [2018-12-24 14:01:56,639 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 2354 transitions. Word has length 5 [2018-12-24 14:01:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:56,639 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 2354 transitions. [2018-12-24 14:01:56,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 2354 transitions. [2018-12-24 14:01:56,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:56,640 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:56,640 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:56,640 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:56,641 INFO L82 PathProgramCache]: Analyzing trace with hash 28958902, now seen corresponding path program 1 times [2018-12-24 14:01:56,641 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:56,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:56,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:56,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:56,642 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:56,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:56,788 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:56,788 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:56,788 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [34], [35] [2018-12-24 14:01:56,789 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:56,789 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:56,791 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:56,791 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:01:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:56,792 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:56,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:56,792 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:56,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:56,810 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:56,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:56,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,846 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:56,882 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,885 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:56,927 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:56,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:56,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:57,055 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,066 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:57,067 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,103 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,139 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,174 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,211 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:57,258 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:57,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:57,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:57,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:57,270 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2018-12-24 14:01:57,279 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:57,280 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,316 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,344 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,366 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,383 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,398 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,411 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,457 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:57,458 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:57,496 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:57,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:01:57,498 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:57,542 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:57,542 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 14:01:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:57,562 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:57,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:57,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:01:57,591 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:57,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:01:57,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:01:57,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:01:57,592 INFO L87 Difference]: Start difference. First operand 324 states and 2354 transitions. Second operand 6 states. [2018-12-24 14:01:57,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:57,909 INFO L93 Difference]: Finished difference Result 344 states and 2373 transitions. [2018-12-24 14:01:57,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:01:57,909 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-12-24 14:01:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:57,914 INFO L225 Difference]: With dead ends: 344 [2018-12-24 14:01:57,914 INFO L226 Difference]: Without dead ends: 343 [2018-12-24 14:01:57,914 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:01:57,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-12-24 14:01:58,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 324. [2018-12-24 14:01:58,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-12-24 14:01:58,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 2354 transitions. [2018-12-24 14:01:58,056 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 2354 transitions. Word has length 5 [2018-12-24 14:01:58,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:58,056 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 2354 transitions. [2018-12-24 14:01:58,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:01:58,057 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 2354 transitions. [2018-12-24 14:01:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:01:58,057 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:58,057 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:01:58,058 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:58,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:58,058 INFO L82 PathProgramCache]: Analyzing trace with hash 28945258, now seen corresponding path program 1 times [2018-12-24 14:01:58,058 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:58,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:58,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:58,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:58,059 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:01:58,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:58,190 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:58,190 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:01:58,190 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [28], [31] [2018-12-24 14:01:58,191 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:58,192 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:58,193 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:58,193 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 78 root evaluator evaluations with a maximum evaluation depth of 2. Performed 78 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:01:58,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:58,193 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:58,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:58,193 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:01:58,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:58,202 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:58,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:58,233 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:58,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2018-12-24 14:01:58,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:01:58,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,245 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:01:58,251 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,279 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2018-12-24 14:01:58,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,286 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,288 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 97 [2018-12-24 14:01:58,297 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2018-12-24 14:01:58,298 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,334 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,365 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,390 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,410 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,425 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,440 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,476 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:01:58,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,515 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:01:58,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,556 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:01:58,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:01:58,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:01:58,678 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,703 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,727 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,751 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,776 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:58,822 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:01:58,822 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2018-12-24 14:01:58,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:58,871 INFO L478 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 106 [2018-12-24 14:01:58,872 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:01:59,026 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:01:59,026 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:106, output treesize:150 [2018-12-24 14:01:59,087 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,092 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,094 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,097 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,101 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:59,110 INFO L478 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 117 [2018-12-24 14:01:59,111 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:01:59,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,327 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,328 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,328 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:59,329 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 130 [2018-12-24 14:01:59,330 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:59,466 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 13 dim-0 vars, and 3 xjuncts. [2018-12-24 14:01:59,467 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:172, output treesize:189 [2018-12-24 14:01:59,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,550 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,550 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,551 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,552 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,566 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,568 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:59,597 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 78 treesize of output 152 [2018-12-24 14:01:59,601 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2018-12-24 14:02:00,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,073 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,073 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,074 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,075 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,076 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,077 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:00,080 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:00,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 103 [2018-12-24 14:02:00,081 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:00,277 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 31 dim-0 vars, and 6 xjuncts. [2018-12-24 14:02:00,278 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:152, output treesize:346 [2018-12-24 14:02:05,717 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2018-12-24 14:02:05,919 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:02:05,920 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:626) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:152) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:286) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:215) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 45 more [2018-12-24 14:02:05,926 INFO L168 Benchmark]: Toolchain (without parser) took 134935.92 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 1.0 GB). Free memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: -454.4 MB). Peak memory consumption was 545.9 MB. Max. memory is 7.1 GB. [2018-12-24 14:02:05,926 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:02:05,926 INFO L168 Benchmark]: Boogie Procedure Inliner took 72.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:02:05,927 INFO L168 Benchmark]: Boogie Preprocessor took 36.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-12-24 14:02:05,927 INFO L168 Benchmark]: RCFGBuilder took 426.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-24 14:02:05,927 INFO L168 Benchmark]: TraceAbstraction took 134394.02 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 1.0 GB). Free memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: -475.6 MB). Peak memory consumption was 524.8 MB. Max. memory is 7.1 GB. [2018-12-24 14:02:05,928 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 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 72.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 426.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 134394.02 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 1.0 GB). Free memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: -475.6 MB). Peak memory consumption was 524.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...