java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-e1a14da [2018-12-24 13:59:49,597 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-24 13:59:49,599 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-24 13:59:49,614 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-24 13:59:49,615 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-24 13:59:49,616 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-24 13:59:49,617 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-24 13:59:49,619 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-24 13:59:49,621 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-24 13:59:49,621 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-24 13:59:49,622 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-12-24 13:59:49,648 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 13:59:49,677 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-24 13:59:49,677 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-24 13:59:49,678 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-24 13:59:49,678 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-24 13:59:49,679 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-24 13:59:49,679 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-24 13:59:49,679 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2018-12-24 13:59:49,679 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-24 13:59:49,679 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-24 13:59:49,680 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-24 13:59:49,680 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-24 13:59:49,681 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-24 13:59:49,681 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-24 13:59:49,681 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-24 13:59:49,682 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-24 13:59:49,682 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-24 13:59:49,682 INFO L133 SettingsManager]: * Use SBE=true [2018-12-24 13:59:49,682 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-24 13:59:49,684 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-24 13:59:49,685 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-24 13:59:49,685 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-24 13:59:49,685 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-24 13:59:49,685 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-24 13:59:49,686 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-24 13:59:49,686 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-24 13:59:49,686 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-24 13:59:49,687 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-24 13:59:49,687 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-24 13:59:49,687 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-24 13:59:49,687 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-24 13:59:49,687 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-24 13:59:49,688 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-24 13:59:49,688 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-24 13:59:49,688 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-24 13:59:49,688 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-24 13:59:49,689 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-24 13:59:49,689 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-24 13:59:49,689 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-24 13:59:49,690 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-24 13:59:49,690 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-24 13:59:49,747 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-24 13:59:49,762 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-24 13:59:49,768 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-24 13:59:49,772 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-24 13:59:49,772 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-24 13:59:49,773 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl [2018-12-24 13:59:49,774 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl' [2018-12-24 13:59:49,838 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-24 13:59:49,840 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-24 13:59:49,840 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-24 13:59:49,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-24 13:59:49,841 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-24 13:59:49,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:49" (1/1) ... [2018-12-24 13:59:49,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:49" (1/1) ... [2018-12-24 13:59:49,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-24 13:59:49,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-24 13:59:49,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-24 13:59:49,919 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-24 13:59:49,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:49" (1/1) ... [2018-12-24 13:59:49,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:49" (1/1) ... [2018-12-24 13:59:49,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:49" (1/1) ... [2018-12-24 13:59:49,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:49" (1/1) ... [2018-12-24 13:59:49,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:49" (1/1) ... [2018-12-24 13:59:49,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:49" (1/1) ... [2018-12-24 13:59:49,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:49" (1/1) ... [2018-12-24 13:59:49,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-24 13:59:49,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-24 13:59:49,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-24 13:59:49,962 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-24 13:59:49,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:49" (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 13:59:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-24 13:59:50,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-24 13:59:50,502 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-24 13:59:50,502 INFO L280 CfgBuilder]: Removed 17 assue(true) statements. [2018-12-24 13:59:50,503 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 01:59:50 BoogieIcfgContainer [2018-12-24 13:59:50,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-24 13:59:50,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-24 13:59:50,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-24 13:59:50,507 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-24 13:59:50,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 01:59:49" (1/2) ... [2018-12-24 13:59:50,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798f487d and model type speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 01:59:50, skipping insertion in model container [2018-12-24 13:59:50,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 01:59:50" (2/2) ... [2018-12-24 13:59:50,511 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-7-limited.bpl [2018-12-24 13:59:50,522 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-24 13:59:50,533 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-12-24 13:59:50,573 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2018-12-24 13:59:50,621 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-24 13:59:50,621 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-24 13:59:50,621 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-24 13:59:50,621 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-24 13:59:50,622 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-24 13:59:50,622 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-24 13:59:50,622 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-24 13:59:50,622 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-24 13:59:50,638 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2018-12-24 13:59:50,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-12-24 13:59:50,646 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:50,647 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2018-12-24 13:59:50,650 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:50,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:50,656 INFO L82 PathProgramCache]: Analyzing trace with hash 992, now seen corresponding path program 1 times [2018-12-24 13:59:50,659 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:50,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:50,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:50,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:50,709 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:50,870 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 13:59:50,872 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 13:59:50,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-24 13:59:50,873 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 13:59:50,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 13:59:50,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 13:59:50,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 13:59:50,897 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2018-12-24 13:59:51,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:51,142 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2018-12-24 13:59:51,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 13:59:51,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-12-24 13:59:51,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:51,158 INFO L225 Difference]: With dead ends: 33 [2018-12-24 13:59:51,158 INFO L226 Difference]: Without dead ends: 28 [2018-12-24 13:59:51,161 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 13:59:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-24 13:59:51,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2018-12-24 13:59:51,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-24 13:59:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 29 transitions. [2018-12-24 13:59:51,197 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 29 transitions. Word has length 2 [2018-12-24 13:59:51,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:51,199 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 29 transitions. [2018-12-24 13:59:51,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 13:59:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 29 transitions. [2018-12-24 13:59:51,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:51,200 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:51,200 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:51,200 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:51,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:51,201 INFO L82 PathProgramCache]: Analyzing trace with hash 30816, now seen corresponding path program 1 times [2018-12-24 13:59:51,201 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:51,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:51,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:51,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:51,203 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:51,301 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 13:59:51,301 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 13:59:51,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-24 13:59:51,302 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 13:59:51,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 13:59:51,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 13:59:51,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 13:59:51,306 INFO L87 Difference]: Start difference. First operand 16 states and 29 transitions. Second operand 3 states. [2018-12-24 13:59:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 13:59:51,561 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2018-12-24 13:59:51,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 13:59:51,562 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-12-24 13:59:51,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 13:59:51,563 INFO L225 Difference]: With dead ends: 28 [2018-12-24 13:59:51,563 INFO L226 Difference]: Without dead ends: 27 [2018-12-24 13:59:51,564 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 13:59:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-24 13:59:51,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2018-12-24 13:59:51,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-24 13:59:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 30 transitions. [2018-12-24 13:59:51,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 30 transitions. Word has length 3 [2018-12-24 13:59:51,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 13:59:51,570 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 30 transitions. [2018-12-24 13:59:51,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 13:59:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 30 transitions. [2018-12-24 13:59:51,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 13:59:51,571 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 13:59:51,571 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 13:59:51,572 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 13:59:51,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:51,572 INFO L82 PathProgramCache]: Analyzing trace with hash 30380, now seen corresponding path program 1 times [2018-12-24 13:59:51,572 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 13:59:51,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:51,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:51,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 13:59:51,574 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 13:59:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:51,738 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 13:59:51,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:51,739 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 13:59:51,740 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 13:59:51,741 INFO L207 CegarAbsIntRunner]: [0], [18], [31] [2018-12-24 13:59:51,780 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 13:59:51,780 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 13:59:51,866 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 13:59:51,867 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 13:59:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 13:59:51,875 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 13:59:51,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 13:59:51,875 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 13:59:51,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 13:59:51,894 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 13:59:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 13:59:51,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 13:59:52,300 WARN L181 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-12-24 13:59:52,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,364 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 26 treesize of output 38 [2018-12-24 13:59:52,391 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 34 treesize of output 29 [2018-12-24 13:59:52,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,443 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,445 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 25 treesize of output 39 [2018-12-24 13:59:52,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,532 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 53 [2018-12-24 13:59:52,648 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-12-24 13:59:52,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,681 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 13:59:52,683 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,687 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,690 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,698 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,704 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:52,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 13:59:52,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 13:59:52,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,799 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 13:59:52,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,813 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 13:59:52,823 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,830 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 13:59:52,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,882 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,884 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 13:59:52,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,905 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,906 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,907 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,913 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:52,916 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 13:59:52,918 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:53,360 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:53,428 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:53,458 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:53,500 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:53,527 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:53,548 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 13:59:53,585 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 13:59:53,586 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:71, output treesize:54 [2018-12-24 13:59:53,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,727 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,731 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,734 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,736 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 13:59:53,762 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 13:59:53,764 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 13:59:54,068 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 13:59:54,068 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2018-12-24 13:59:55,295 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 13:59:55,295 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 13:59:55,314 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 13:59:55,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 13:59:55,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 13:59:55,335 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 13:59:55,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 13:59:55,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 13:59:55,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 13:59:55,336 INFO L87 Difference]: Start difference. First operand 17 states and 30 transitions. Second operand 6 states. [2018-12-24 14:00:15,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:15,370 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2018-12-24 14:00:15,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:00:15,372 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:00:15,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:15,373 INFO L225 Difference]: With dead ends: 54 [2018-12-24 14:00:15,373 INFO L226 Difference]: Without dead ends: 52 [2018-12-24 14:00:15,374 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:00:15,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-24 14:00:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 20. [2018-12-24 14:00:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-24 14:00:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 41 transitions. [2018-12-24 14:00:15,380 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 41 transitions. Word has length 3 [2018-12-24 14:00:15,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:15,381 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 41 transitions. [2018-12-24 14:00:15,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:00:15,381 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 41 transitions. [2018-12-24 14:00:15,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:00:15,381 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:15,382 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:00:15,382 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:15,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:15,382 INFO L82 PathProgramCache]: Analyzing trace with hash 30008, now seen corresponding path program 1 times [2018-12-24 14:00:15,383 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:15,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:15,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:15,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:15,384 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:15,449 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 14:00:15,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:15,449 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:15,449 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:00:15,450 INFO L207 CegarAbsIntRunner]: [0], [6], [31] [2018-12-24 14:00:15,451 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:15,451 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:15,463 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:15,463 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:00:15,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:15,464 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:15,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:15,464 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 14:00:15,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:15,474 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:15,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:15,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:00:15,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,614 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 14:00:15,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,649 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 14:00:15,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,669 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 14:00:15,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,730 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,760 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 14:00:15,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,857 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,859 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 14:00:15,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,876 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:15,881 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 14:00:15,883 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:15,970 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,006 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,035 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,059 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,087 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,141 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,188 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,190 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 26 treesize of output 38 [2018-12-24 14:00:16,196 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 34 treesize of output 29 [2018-12-24 14:00:16,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,206 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 25 treesize of output 39 [2018-12-24 14:00:16,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,240 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,241 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 27 treesize of output 53 [2018-12-24 14:00:16,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,283 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:16,284 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,288 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,290 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,292 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,294 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,327 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 14:00:16,327 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 8 variables, input treesize:71, output treesize:54 [2018-12-24 14:00:16,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,371 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,374 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,376 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,377 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,378 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,379 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,381 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,382 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,383 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:16,386 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 14:00:16,387 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:16,488 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 14:00:16,489 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2018-12-24 14:00:16,564 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 14:00:16,564 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:16,589 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 14:00:16,612 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 14:00:16,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2018-12-24 14:00:16,613 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:00:16,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:00:16,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:00:16,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:00:16,614 INFO L87 Difference]: Start difference. First operand 20 states and 41 transitions. Second operand 4 states. [2018-12-24 14:00:16,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:16,734 INFO L93 Difference]: Finished difference Result 25 states and 67 transitions. [2018-12-24 14:00:16,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:00:16,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-12-24 14:00:16,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:16,736 INFO L225 Difference]: With dead ends: 25 [2018-12-24 14:00:16,737 INFO L226 Difference]: Without dead ends: 24 [2018-12-24 14:00:16,737 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:00:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-24 14:00:16,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-12-24 14:00:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-24 14:00:16,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 66 transitions. [2018-12-24 14:00:16,745 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 66 transitions. Word has length 3 [2018-12-24 14:00:16,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:16,745 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 66 transitions. [2018-12-24 14:00:16,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:00:16,745 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 66 transitions. [2018-12-24 14:00:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:00:16,746 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:16,746 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:00:16,746 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:16,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:16,747 INFO L82 PathProgramCache]: Analyzing trace with hash 30132, now seen corresponding path program 1 times [2018-12-24 14:00:16,747 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:16,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:16,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:16,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:16,748 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:16,870 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 14:00:16,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:16,871 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:16,871 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:00:16,871 INFO L207 CegarAbsIntRunner]: [0], [10], [31] [2018-12-24 14:00:16,874 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:16,875 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:16,884 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:16,884 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:00:16,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:16,885 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:16,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:16,885 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 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 14:00:16,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:16,898 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:16,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:17,062 WARN L181 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2018-12-24 14:00:17,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:00:17,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,073 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 14:00:17,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,122 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 14:00:17,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,136 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,137 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 14:00:17,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,152 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 14:00:17,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,277 INFO L303 Elim1Store]: Index analysis took 121 ms [2018-12-24 14:00:17,278 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 14:00:17,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,299 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,307 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 14:00:17,311 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,473 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,542 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,575 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,600 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,620 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,650 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,709 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 37 treesize of output 46 [2018-12-24 14:00:17,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2018-12-24 14:00:17,759 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 36 treesize of output 45 [2018-12-24 14:00:17,770 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2018-12-24 14:00:17,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,857 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:17,865 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,873 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,878 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,879 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,882 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:17,944 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 14:00:17,944 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:54 [2018-12-24 14:00:17,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:17,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,004 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,010 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:18,034 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 14:00:18,035 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:18,136 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 14:00:18,136 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2018-12-24 14:00:19,473 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 14:00:19,473 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:19,525 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 14:00:19,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:19,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:00:19,545 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:19,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:00:19,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:00:19,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:00:19,546 INFO L87 Difference]: Start difference. First operand 23 states and 66 transitions. Second operand 6 states. [2018-12-24 14:00:38,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:38,369 INFO L93 Difference]: Finished difference Result 57 states and 111 transitions. [2018-12-24 14:00:38,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:00:38,369 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:00:38,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:38,371 INFO L225 Difference]: With dead ends: 57 [2018-12-24 14:00:38,371 INFO L226 Difference]: Without dead ends: 56 [2018-12-24 14:00:38,372 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:00:38,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-24 14:00:38,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 25. [2018-12-24 14:00:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-24 14:00:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 82 transitions. [2018-12-24 14:00:38,381 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 82 transitions. Word has length 3 [2018-12-24 14:00:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:38,382 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 82 transitions. [2018-12-24 14:00:38,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:00:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 82 transitions. [2018-12-24 14:00:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:00:38,383 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:38,383 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:00:38,383 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:38,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:38,384 INFO L82 PathProgramCache]: Analyzing trace with hash 30628, now seen corresponding path program 1 times [2018-12-24 14:00:38,384 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:38,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:38,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:38,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:38,385 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:38,469 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 14:00:38,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:38,469 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:38,469 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:00:38,470 INFO L207 CegarAbsIntRunner]: [0], [26], [31] [2018-12-24 14:00:38,471 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:38,471 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:38,481 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:38,481 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:00:38,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:38,482 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:38,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:38,482 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 14:00:38,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:38,493 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:38,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:38,593 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:00:38,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,600 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 14:00:38,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-12-24 14:00:38,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,616 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,619 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 14:00:38,631 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,633 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,638 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 14:00:38,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,669 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 14:00:38,677 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 14:00:38,681 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 14:00:38,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,689 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 14:00:38,691 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,764 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,808 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,841 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,867 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,888 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,909 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:38,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,965 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2018-12-24 14:00:38,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,998 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:38,999 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 33 treesize of output 48 [2018-12-24 14:00:39,005 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 36 treesize of output 45 [2018-12-24 14:00:39,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,010 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2018-12-24 14:00:39,069 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,070 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,073 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,074 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,076 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:00:39,077 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,079 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,081 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,083 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,086 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,119 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 14:00:39,119 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:54 [2018-12-24 14:00:39,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,154 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,156 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,159 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,162 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:39,176 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 14:00:39,178 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:39,275 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 14:00:39,275 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2018-12-24 14:00:40,498 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 14:00:40,499 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:00:40,509 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 14:00:40,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:00:40,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:00:40,529 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:00:40,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:00:40,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:00:40,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:00:40,529 INFO L87 Difference]: Start difference. First operand 25 states and 82 transitions. Second operand 6 states. [2018-12-24 14:00:59,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:59,097 INFO L93 Difference]: Finished difference Result 59 states and 127 transitions. [2018-12-24 14:00:59,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:00:59,099 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:00:59,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:59,101 INFO L225 Difference]: With dead ends: 59 [2018-12-24 14:00:59,101 INFO L226 Difference]: Without dead ends: 57 [2018-12-24 14:00:59,105 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:00:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-24 14:00:59,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2018-12-24 14:00:59,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-24 14:00:59,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 101 transitions. [2018-12-24 14:00:59,120 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 101 transitions. Word has length 3 [2018-12-24 14:00:59,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:59,120 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 101 transitions. [2018-12-24 14:00:59,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:00:59,120 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 101 transitions. [2018-12-24 14:00:59,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:59,123 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:59,123 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:59,124 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:59,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:59,124 INFO L82 PathProgramCache]: Analyzing trace with hash 955362, now seen corresponding path program 1 times [2018-12-24 14:00:59,124 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:59,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:59,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:59,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:59,126 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:59,174 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 14:00:59,174 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:00:59,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-24 14:00:59,174 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:00:59,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 14:00:59,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 14:00:59,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 14:00:59,175 INFO L87 Difference]: Start difference. First operand 29 states and 101 transitions. Second operand 3 states. [2018-12-24 14:00:59,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:00:59,309 INFO L93 Difference]: Finished difference Result 33 states and 102 transitions. [2018-12-24 14:00:59,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:00:59,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-12-24 14:00:59,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:00:59,311 INFO L225 Difference]: With dead ends: 33 [2018-12-24 14:00:59,311 INFO L226 Difference]: Without dead ends: 32 [2018-12-24 14:00:59,311 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 14:00:59,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-24 14:00:59,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2018-12-24 14:00:59,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-24 14:00:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 100 transitions. [2018-12-24 14:00:59,319 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 100 transitions. Word has length 4 [2018-12-24 14:00:59,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:00:59,319 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 100 transitions. [2018-12-24 14:00:59,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 14:00:59,319 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 100 transitions. [2018-12-24 14:00:59,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:00:59,320 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:00:59,320 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:00:59,321 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:00:59,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:59,321 INFO L82 PathProgramCache]: Analyzing trace with hash 941844, now seen corresponding path program 1 times [2018-12-24 14:00:59,321 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:00:59,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:59,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:59,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:00:59,323 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:00:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:59,420 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 14:00:59,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:59,421 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:00:59,421 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:00:59,421 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [33] [2018-12-24 14:00:59,422 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:00:59,422 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:00:59,433 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:00:59,434 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:00:59,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:00:59,434 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:00:59,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:00:59,434 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 14:00:59,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:00:59,443 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:00:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:00:59,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:00:59,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 23 [2018-12-24 14:00:59,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2018-12-24 14:00:59,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,475 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 31 [2018-12-24 14:00:59,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,488 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,489 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 41 [2018-12-24 14:00:59,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2018-12-24 14:00:59,532 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,546 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,552 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,555 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,557 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,577 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 14:00:59,583 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 29 [2018-12-24 14:00:59,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,595 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 29 treesize of output 35 [2018-12-24 14:00:59,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-12-24 14:00:59,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,625 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2018-12-24 14:00:59,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,643 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,644 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,646 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 35 treesize of output 81 [2018-12-24 14:00:59,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,718 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,727 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,730 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 37 treesize of output 100 [2018-12-24 14:00:59,731 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,782 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,812 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,835 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,863 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,879 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,895 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:00:59,924 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 14:00:59,924 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:60, output treesize:55 [2018-12-24 14:00:59,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,983 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,985 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:00:59,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:00,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 104 [2018-12-24 14:01:00,017 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:01:00,212 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 11 dim-0 vars, and 2 xjuncts. [2018-12-24 14:01:00,212 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:65, output treesize:104 [2018-12-24 14:01:01,732 WARN L181 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2018-12-24 14:01:01,737 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 14:01:01,738 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:01,761 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 14:01:01,779 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 14:01:01,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2018-12-24 14:01:01,780 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:01:01,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:01:01,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:01:01,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:01:01,781 INFO L87 Difference]: Start difference. First operand 29 states and 100 transitions. Second operand 4 states. [2018-12-24 14:01:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:01,844 INFO L93 Difference]: Finished difference Result 33 states and 111 transitions. [2018-12-24 14:01:01,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:01:01,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-24 14:01:01,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:01,845 INFO L225 Difference]: With dead ends: 33 [2018-12-24 14:01:01,846 INFO L226 Difference]: Without dead ends: 32 [2018-12-24 14:01:01,846 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:01:01,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-24 14:01:01,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-12-24 14:01:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-24 14:01:01,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 110 transitions. [2018-12-24 14:01:01,854 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 110 transitions. Word has length 4 [2018-12-24 14:01:01,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:01,854 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 110 transitions. [2018-12-24 14:01:01,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:01:01,854 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 110 transitions. [2018-12-24 14:01:01,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:01,854 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:01,855 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:01,855 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:01,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:01,855 INFO L82 PathProgramCache]: Analyzing trace with hash 941532, now seen corresponding path program 1 times [2018-12-24 14:01:01,855 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:01,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:01,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:01,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:01,856 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:01,960 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 14:01:01,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:01,961 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:01,961 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:01,961 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [31] [2018-12-24 14:01:01,962 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:01,962 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:01,968 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:01,968 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:01,969 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:01,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:01,969 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 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 14:01:01,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:01,978 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:01,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:02,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:02,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 14:01:02,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,053 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 14:01:02,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 14:01:02,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,107 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 14:01:02,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,141 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,142 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 14:01:02,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,177 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,180 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 14:01:02,181 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,237 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,273 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,304 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,328 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,346 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,363 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2018-12-24 14:01:02,414 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 34 treesize of output 29 [2018-12-24 14:01:02,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,434 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 25 treesize of output 39 [2018-12-24 14:01:02,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,441 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,441 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,442 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 27 treesize of output 53 [2018-12-24 14:01:02,583 WARN L181 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-12-24 14:01:02,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:01:02,594 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,597 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,598 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,599 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,626 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,666 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 14:01:02,667 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2018-12-24 14:01:02,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,727 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,730 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,731 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,733 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,735 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,736 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,737 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,750 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 14:01:02,751 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:02,944 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 14:01:02,945 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2018-12-24 14:01:02,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,985 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:02,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,000 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,002 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:03,071 INFO L303 Elim1Store]: Index analysis took 101 ms [2018-12-24 14:01:03,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 134 [2018-12-24 14:01:03,073 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:03,163 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 14:01:03,163 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2018-12-24 14:01:05,419 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 14:01:05,420 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:05,448 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 14:01:05,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:05,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:05,468 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:05,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:05,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:05,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:05,469 INFO L87 Difference]: Start difference. First operand 31 states and 110 transitions. Second operand 8 states. [2018-12-24 14:01:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:01:41,122 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2018-12-24 14:01:41,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:01:41,124 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:01:41,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:01:41,126 INFO L225 Difference]: With dead ends: 74 [2018-12-24 14:01:41,126 INFO L226 Difference]: Without dead ends: 72 [2018-12-24 14:01:41,127 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:01:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-12-24 14:01:41,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 38. [2018-12-24 14:01:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-24 14:01:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 139 transitions. [2018-12-24 14:01:41,135 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 139 transitions. Word has length 4 [2018-12-24 14:01:41,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:01:41,135 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 139 transitions. [2018-12-24 14:01:41,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:01:41,135 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 139 transitions. [2018-12-24 14:01:41,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:01:41,136 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:01:41,136 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:01:41,136 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:01:41,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:41,137 INFO L82 PathProgramCache]: Analyzing trace with hash 941160, now seen corresponding path program 1 times [2018-12-24 14:01:41,137 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:01:41,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:41,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:41,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:01:41,138 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:01:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:41,267 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 14:01:41,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:41,267 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:01:41,267 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:01:41,268 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [31] [2018-12-24 14:01:41,269 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:01:41,269 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:01:41,274 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:01:41,274 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:01:41,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:01:41,275 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:01:41,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:01:41,275 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 14:01:41,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:01:41,283 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:01:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:01:41,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:01:41,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:01:41,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,364 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 14:01:41,372 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,374 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 14:01:41,380 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,382 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,383 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,385 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 14:01:41,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,394 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 14:01:41,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,404 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 14:01:41,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 14:01:41,419 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,479 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,514 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,542 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,565 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,585 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,603 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,654 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 40 treesize of output 49 [2018-12-24 14:01:41,658 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 45 treesize of output 37 [2018-12-24 14:01:41,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 64 [2018-12-24 14:01:41,688 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 40 treesize of output 59 [2018-12-24 14:01:41,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,743 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:01:41,744 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,746 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,748 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,749 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,751 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,780 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 14:01:41,780 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:85, output treesize:54 [2018-12-24 14:01:41,823 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,832 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,838 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,850 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,851 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:41,852 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 14:01:41,853 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:41,941 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 14:01:41,942 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2018-12-24 14:01:42,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,219 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:01:42,220 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:01:42,221 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2018-12-24 14:01:42,222 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:01:42,842 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 14:01:42,842 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:54 [2018-12-24 14:01:45,115 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 14:01:45,115 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:01:45,137 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 14:01:45,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:01:45,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:01:45,156 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:01:45,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:01:45,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:01:45,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:01:45,157 INFO L87 Difference]: Start difference. First operand 38 states and 139 transitions. Second operand 8 states. [2018-12-24 14:02:22,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:02:22,203 INFO L93 Difference]: Finished difference Result 71 states and 181 transitions. [2018-12-24 14:02:22,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:02:22,204 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:02:22,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:02:22,205 INFO L225 Difference]: With dead ends: 71 [2018-12-24 14:02:22,206 INFO L226 Difference]: Without dead ends: 70 [2018-12-24 14:02:22,206 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:02:22,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-24 14:02:22,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2018-12-24 14:02:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-24 14:02:22,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 139 transitions. [2018-12-24 14:02:22,215 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 139 transitions. Word has length 4 [2018-12-24 14:02:22,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:02:22,215 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 139 transitions. [2018-12-24 14:02:22,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:02:22,215 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 139 transitions. [2018-12-24 14:02:22,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:02:22,216 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:02:22,216 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:02:22,216 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:02:22,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:22,217 INFO L82 PathProgramCache]: Analyzing trace with hash 941656, now seen corresponding path program 1 times [2018-12-24 14:02:22,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:02:22,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:22,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:22,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:02:22,220 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:02:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:22,311 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 14:02:22,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:22,312 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:02:22,312 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:02:22,312 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [31] [2018-12-24 14:02:22,313 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:02:22,313 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:02:22,319 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:02:22,319 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:02:22,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:02:22,320 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:02:22,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:02:22,320 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 14:02:22,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:02:22,334 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:02:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:02:22,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:02:22,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2018-12-24 14:02:22,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,476 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 33 treesize of output 48 [2018-12-24 14:02:22,486 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 36 treesize of output 45 [2018-12-24 14:02:22,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2018-12-24 14:02:22,760 WARN L181 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2018-12-24 14:02:22,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,768 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,769 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,770 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:02:22,772 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:22,775 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:22,776 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:22,779 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:22,781 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:22,800 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:02:22,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,806 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 14:02:22,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,811 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 14:02:22,822 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,823 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,827 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 14:02:22,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,888 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 14:02:22,893 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,896 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,898 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 14:02:22,903 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,905 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,907 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:22,910 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 14:02:22,911 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:22,978 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:23,011 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:23,037 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:23,057 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:23,074 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:23,087 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:02:23,114 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 14:02:23,116 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2018-12-24 14:02:23,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,156 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,157 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,159 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,161 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,164 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,177 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,178 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 14:02:23,179 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:23,275 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:02:23,275 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2018-12-24 14:02:23,385 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,386 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,387 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,409 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:02:23,416 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:02:23,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2018-12-24 14:02:23,418 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:02:23,520 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 14:02:23,520 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:54 [2018-12-24 14:02:25,814 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 14:02:25,814 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:02:25,838 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 14:02:25,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:02:25,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:02:25,859 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:02:25,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:02:25,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:02:25,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:02:25,860 INFO L87 Difference]: Start difference. First operand 38 states and 139 transitions. Second operand 8 states. [2018-12-24 14:03:00,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:03:00,577 INFO L93 Difference]: Finished difference Result 71 states and 181 transitions. [2018-12-24 14:03:00,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:03:00,578 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:03:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:03:00,579 INFO L225 Difference]: With dead ends: 71 [2018-12-24 14:03:00,579 INFO L226 Difference]: Without dead ends: 69 [2018-12-24 14:03:00,580 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:03:00,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-12-24 14:03:00,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 37. [2018-12-24 14:03:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-24 14:03:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 138 transitions. [2018-12-24 14:03:00,591 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 138 transitions. Word has length 4 [2018-12-24 14:03:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:03:00,592 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 138 transitions. [2018-12-24 14:03:00,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:03:00,592 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 138 transitions. [2018-12-24 14:03:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:03:00,592 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:03:00,593 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:03:00,593 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:03:00,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:00,593 INFO L82 PathProgramCache]: Analyzing trace with hash 941718, now seen corresponding path program 1 times [2018-12-24 14:03:00,593 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:03:00,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:00,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:00,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:00,595 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:03:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:00,726 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 14:03:00,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:00,727 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:03:00,727 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:03:00,727 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [31] [2018-12-24 14:03:00,728 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:03:00,729 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:03:00,735 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:03:00,735 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:03:00,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:00,736 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:03:00,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:00,736 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 14:03:00,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:00,756 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:03:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:00,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:03:00,887 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-12-24 14:03:00,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:03:00,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 14:03:00,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,902 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 14:03:00,906 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 14:03:00,915 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 14:03:00,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,967 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 14:03:00,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,977 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:00,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 14:03:00,980 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:01,038 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:01,077 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:01,103 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:01,124 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:01,144 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:01,159 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:01,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,205 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 26 treesize of output 38 [2018-12-24 14:03:01,208 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 34 treesize of output 29 [2018-12-24 14:03:01,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,247 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,247 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 25 treesize of output 39 [2018-12-24 14:03:01,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,251 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,252 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 27 treesize of output 53 [2018-12-24 14:03:01,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:03:01,288 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:01,291 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:01,293 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:01,295 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:01,300 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:01,328 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 14:03:01,328 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2018-12-24 14:03:01,386 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,409 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 14:03:01,432 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:01,515 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 14:03:01,516 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2018-12-24 14:03:01,736 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,737 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,750 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,761 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,763 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:01,769 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 14:03:01,770 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:01,900 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 14:03:01,900 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2018-12-24 14:03:04,177 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 14:03:04,178 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:03:04,217 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 14:03:04,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:03:04,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:03:04,236 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:03:04,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:03:04,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:03:04,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:03:04,238 INFO L87 Difference]: Start difference. First operand 37 states and 138 transitions. Second operand 8 states. [2018-12-24 14:03:38,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:03:38,223 INFO L93 Difference]: Finished difference Result 74 states and 200 transitions. [2018-12-24 14:03:38,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:03:38,224 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:03:38,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:03:38,224 INFO L225 Difference]: With dead ends: 74 [2018-12-24 14:03:38,224 INFO L226 Difference]: Without dead ends: 63 [2018-12-24 14:03:38,225 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:03:38,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-24 14:03:38,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 35. [2018-12-24 14:03:38,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-24 14:03:38,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 155 transitions. [2018-12-24 14:03:38,233 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 155 transitions. Word has length 4 [2018-12-24 14:03:38,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:03:38,234 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 155 transitions. [2018-12-24 14:03:38,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:03:38,234 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 155 transitions. [2018-12-24 14:03:38,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:03:38,234 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:03:38,235 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:03:38,235 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:03:38,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:38,235 INFO L82 PathProgramCache]: Analyzing trace with hash 941284, now seen corresponding path program 1 times [2018-12-24 14:03:38,235 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:03:38,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:38,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:38,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:38,236 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:03:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:38,316 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 14:03:38,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:38,317 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:03:38,317 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:03:38,317 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [31] [2018-12-24 14:03:38,319 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:03:38,319 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:03:38,324 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:03:38,324 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:03:38,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:38,325 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:03:38,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:38,325 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 14:03:38,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:38,343 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:03:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:38,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:03:38,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,404 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 26 treesize of output 38 [2018-12-24 14:03:38,407 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 34 treesize of output 29 [2018-12-24 14:03:38,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,412 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 25 treesize of output 39 [2018-12-24 14:03:38,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,419 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 27 treesize of output 53 [2018-12-24 14:03:38,445 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,446 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,447 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:03:38,451 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:38,454 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:38,456 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:38,458 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:38,460 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:38,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2018-12-24 14:03:38,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,482 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 14:03:38,493 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,494 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 14:03:38,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,500 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 14:03:38,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,543 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 14:03:38,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,548 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,550 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,551 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,552 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,554 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 14:03:38,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,562 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,563 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,564 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,565 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 14:03:38,567 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:38,629 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:38,661 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:38,687 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:38,707 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:38,724 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:38,739 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:38,768 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 14:03:38,769 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2018-12-24 14:03:38,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,812 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,813 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,815 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,821 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,822 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,823 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,829 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 14:03:38,830 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:38,915 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:03:38,915 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2018-12-24 14:03:38,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,977 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,979 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,983 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:38,998 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 14:03:38,999 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:39,096 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 14:03:39,097 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2018-12-24 14:03:41,381 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 14:03:41,381 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:03:41,471 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 14:03:41,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:03:41,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:03:41,490 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:03:41,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:03:41,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:03:41,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:03:41,491 INFO L87 Difference]: Start difference. First operand 35 states and 155 transitions. Second operand 8 states. [2018-12-24 14:03:54,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:03:54,779 INFO L93 Difference]: Finished difference Result 67 states and 213 transitions. [2018-12-24 14:03:54,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:03:54,779 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:03:54,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:03:54,780 INFO L225 Difference]: With dead ends: 67 [2018-12-24 14:03:54,780 INFO L226 Difference]: Without dead ends: 65 [2018-12-24 14:03:54,780 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:03:54,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-12-24 14:03:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-12-24 14:03:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-24 14:03:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 178 transitions. [2018-12-24 14:03:54,789 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 178 transitions. Word has length 4 [2018-12-24 14:03:54,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:03:54,789 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 178 transitions. [2018-12-24 14:03:54,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:03:54,790 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 178 transitions. [2018-12-24 14:03:54,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:03:54,790 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:03:54,790 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:03:54,791 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:03:54,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:54,791 INFO L82 PathProgramCache]: Analyzing trace with hash 930312, now seen corresponding path program 1 times [2018-12-24 14:03:54,791 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:03:54,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:54,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:54,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:03:54,792 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:03:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:54,998 WARN L181 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2018-12-24 14:03:55,007 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 14:03:55,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:55,007 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:03:55,007 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:03:55,008 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [33] [2018-12-24 14:03:55,010 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-24 14:03:55,010 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:03:55,018 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:03:55,018 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2018-12-24 14:03:55,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:03:55,019 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:03:55,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:03:55,019 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 14:03:55,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:03:55,033 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:03:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:03:55,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:03:55,084 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 14:03:55,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 14:03:55,092 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,093 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 29 treesize of output 39 [2018-12-24 14:03:55,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,102 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 31 treesize of output 49 [2018-12-24 14:03:55,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,114 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 33 treesize of output 63 [2018-12-24 14:03:55,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 85 [2018-12-24 14:03:55,140 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,150 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 104 [2018-12-24 14:03:55,151 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:55,217 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:55,246 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:55,273 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:55,294 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:55,312 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:55,327 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:55,370 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,370 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 26 treesize of output 38 [2018-12-24 14:03:55,374 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 34 treesize of output 29 [2018-12-24 14:03:55,378 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,379 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 25 treesize of output 35 [2018-12-24 14:03:55,384 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,385 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,386 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 27 treesize of output 45 [2018-12-24 14:03:55,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 33 [2018-12-24 14:03:55,421 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-12-24 14:03:55,437 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:55,487 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:55,491 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:55,496 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:03:55,527 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 14:03:55,527 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:68, output treesize:59 [2018-12-24 14:03:55,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,563 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,565 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,566 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,575 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:03:55,694 INFO L303 Elim1Store]: Index analysis took 141 ms [2018-12-24 14:03:55,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 46 treesize of output 120 [2018-12-24 14:03:55,755 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2018-12-24 14:03:56,120 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 26 dim-0 vars, and 5 xjuncts. [2018-12-24 14:03:56,121 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:69, output treesize:236 [2018-12-24 14:04:01,633 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2018-12-24 14:04:01,835 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:04:01,837 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 14:04:01,841 INFO L168 Benchmark]: Toolchain (without parser) took 252002.76 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 814.7 MB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -258.3 MB). Peak memory consumption was 556.4 MB. Max. memory is 7.1 GB. [2018-12-24 14:04:01,842 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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 14:04:01,842 INFO L168 Benchmark]: Boogie Procedure Inliner took 77.60 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 14:04:01,842 INFO L168 Benchmark]: Boogie Preprocessor took 42.44 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 14:04:01,842 INFO L168 Benchmark]: RCFGBuilder took 541.91 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-12-24 14:04:01,843 INFO L168 Benchmark]: TraceAbstraction took 251336.39 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 814.7 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -279.4 MB). Peak memory consumption was 535.3 MB. Max. memory is 7.1 GB. [2018-12-24 14:04:01,845 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 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 77.60 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 42.44 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 541.91 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 251336.39 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 814.7 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -279.4 MB). Peak memory consumption was 535.3 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...