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-8-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fa1c628-m [2019-01-31 17:07:26,296 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-31 17:07:26,298 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-31 17:07:26,314 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-31 17:07:26,315 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-31 17:07:26,316 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-31 17:07:26,318 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-31 17:07:26,322 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-31 17:07:26,323 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-31 17:07:26,326 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-31 17:07:26,328 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-31 17:07:26,370 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-01-31 17:07:26,382 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-31 17:07:26,382 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-31 17:07:26,383 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-31 17:07:26,383 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-31 17:07:26,383 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-31 17:07:26,383 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-31 17:07:26,384 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-31 17:07:26,384 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-31 17:07:26,384 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-31 17:07:26,384 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-31 17:07:26,384 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-31 17:07:26,385 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-31 17:07:26,385 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-31 17:07:26,385 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-31 17:07:26,386 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-31 17:07:26,386 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-31 17:07:26,386 INFO L133 SettingsManager]: * Use SBE=true [2019-01-31 17:07:26,386 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-31 17:07:26,386 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-31 17:07:26,387 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-31 17:07:26,387 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-31 17:07:26,387 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-31 17:07:26,387 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-31 17:07:26,387 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-31 17:07:26,388 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-31 17:07:26,388 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-31 17:07:26,388 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-31 17:07:26,388 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-31 17:07:26,388 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-31 17:07:26,388 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-31 17:07:26,389 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-31 17:07:26,389 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-01-31 17:07:26,389 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-31 17:07:26,389 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-31 17:07:26,389 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-31 17:07:26,390 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-31 17:07:26,390 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-31 17:07:26,390 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in [2019-01-31 17:07:26,390 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-31 17:07:26,390 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-31 17:07:26,421 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-31 17:07:26,436 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-31 17:07:26,441 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-31 17:07:26,442 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-31 17:07:26,443 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-31 17:07:26,444 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl [2019-01-31 17:07:26,444 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl' [2019-01-31 17:07:26,493 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-31 17:07:26,495 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-31 17:07:26,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-31 17:07:26,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-31 17:07:26,496 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-31 17:07:26,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:07:26" (1/1) ... [2019-01-31 17:07:26,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:07:26" (1/1) ... [2019-01-31 17:07:26,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-31 17:07:26,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-31 17:07:26,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-31 17:07:26,567 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-31 17:07:26,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:07:26" (1/1) ... [2019-01-31 17:07:26,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:07:26" (1/1) ... [2019-01-31 17:07:26,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:07:26" (1/1) ... [2019-01-31 17:07:26,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:07:26" (1/1) ... [2019-01-31 17:07:26,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:07:26" (1/1) ... [2019-01-31 17:07:26,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:07:26" (1/1) ... [2019-01-31 17:07:26,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:07:26" (1/1) ... [2019-01-31 17:07:26,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-31 17:07:26,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-31 17:07:26,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-31 17:07:26,609 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-31 17:07:26,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:07:26" (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:8092 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-01-31 17:07:26,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-31 17:07:26,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-31 17:07:27,048 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-31 17:07:27,048 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-01-31 17:07:27,050 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:07:27 BoogieIcfgContainer [2019-01-31 17:07:27,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-31 17:07:27,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-31 17:07:27,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-31 17:07:27,055 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-31 17:07:27,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 05:07:26" (1/2) ... [2019-01-31 17:07:27,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14366b3e and model type speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:07:27, skipping insertion in model container [2019-01-31 17:07:27,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:07:27" (2/2) ... [2019-01-31 17:07:27,058 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-unlimited.bpl [2019-01-31 17:07:27,069 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-31 17:07:27,078 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-01-31 17:07:27,096 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-01-31 17:07:27,152 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-31 17:07:27,155 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-31 17:07:27,155 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-31 17:07:27,155 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-31 17:07:27,155 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-31 17:07:27,156 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-31 17:07:27,158 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-31 17:07:27,158 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-31 17:07:27,177 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-01-31 17:07:27,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-31 17:07:27,183 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:07:27,184 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-31 17:07:27,187 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:07:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:07:27,193 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-01-31 17:07:27,196 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:07:27,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:07:27,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:07:27,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:07:27,248 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:07:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:07:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:27,415 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-31 17:07:27,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-31 17:07:27,416 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-31 17:07:27,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-31 17:07:27,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-31 17:07:27,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-31 17:07:27,431 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-01-31 17:07:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:07:27,674 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-01-31 17:07:27,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-31 17:07:27,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-31 17:07:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:07:27,689 INFO L225 Difference]: With dead ends: 37 [2019-01-31 17:07:27,689 INFO L226 Difference]: Without dead ends: 32 [2019-01-31 17:07:27,693 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-31 17:07:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-31 17:07:27,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-01-31 17:07:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-01-31 17:07:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-01-31 17:07:27,728 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-01-31 17:07:27,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:07:27,729 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-01-31 17:07:27,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-31 17:07:27,729 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-01-31 17:07:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-31 17:07:27,730 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:07:27,730 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-31 17:07:27,731 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:07:27,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:07:27,731 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-01-31 17:07:27,732 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:07:27,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:07:27,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:07:27,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:07:27,733 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:07:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:07:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:27,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:07:27,916 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:07:27,917 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-31 17:07:27,920 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-01-31 17:07:27,968 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:07:27,968 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:07:28,050 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:07:28,052 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-31 17:07:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:07:28,058 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:07:28,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:07:28,058 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:07:28,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:07:28,075 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:07:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:07:28,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:07:28,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:07:28,288 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:07:28,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:07:28,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,398 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:07:28,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,522 INFO L303 Elim1Store]: Index analysis took 112 ms [2019-01-31 17:07:28,524 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:07:28,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,644 INFO L303 Elim1Store]: Index analysis took 106 ms [2019-01-31 17:07:28,647 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:07:28,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,681 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:07:28,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:28,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:07:28,738 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:29,014 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:29,452 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:29,513 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:29,554 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:29,593 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:29,636 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:29,667 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:29,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:29,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-31 17:07:29,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:29,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:29,827 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-31 17:07:29,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:29,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:29,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:29,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:29,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-31 17:07:30,114 WARN L181 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-31 17:07:30,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-31 17:07:30,259 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-31 17:07:30,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,374 INFO L303 Elim1Store]: Index analysis took 112 ms [2019-01-31 17:07:30,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:07:30,521 WARN L181 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-31 17:07:30,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:07:30,732 WARN L181 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:07:30,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:30,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:07:30,828 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:30,939 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:31,069 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:31,138 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:31,208 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:31,294 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:31,408 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:31,519 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:07:31,520 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:147, output treesize:153 [2019-01-31 17:07:31,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:31,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:07:31,591 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:31,776 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:07:31,776 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-31 17:07:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:31,851 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:07:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:31,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:07:31,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-31 17:07:31,990 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:07:31,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 17:07:31,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 17:07:31,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-31 17:07:31,992 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2019-01-31 17:07:43,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:07:43,422 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2019-01-31 17:07:43,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 17:07:43,423 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-31 17:07:43,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:07:43,425 INFO L225 Difference]: With dead ends: 63 [2019-01-31 17:07:43,425 INFO L226 Difference]: Without dead ends: 60 [2019-01-31 17:07:43,426 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:07:43,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-31 17:07:43,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-01-31 17:07:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-31 17:07:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2019-01-31 17:07:43,434 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2019-01-31 17:07:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:07:43,434 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2019-01-31 17:07:43,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 17:07:43,434 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2019-01-31 17:07:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-31 17:07:43,435 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:07:43,435 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-31 17:07:43,435 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:07:43,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:07:43,436 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2019-01-31 17:07:43,436 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:07:43,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:07:43,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:07:43,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:07:43,438 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:07:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:07:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:43,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:07:43,662 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:07:43,663 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-31 17:07:43,663 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2019-01-31 17:07:43,664 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:07:43,664 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:07:43,677 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:07:43,677 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-31 17:07:43,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:07:43,678 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:07:43,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:07:43,680 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:07:43,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:07:43,698 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:07:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:07:43,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:07:43,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:07:43,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:07:43,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:07:43,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:07:43,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:07:43,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:07:43,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:43,898 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:07:43,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:07:43,944 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:44,035 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:44,086 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:44,122 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:44,153 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:44,176 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:44,196 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:44,220 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:44,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,269 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:07:44,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,379 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:07:44,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:07:44,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,558 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:07:44,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:07:44,859 WARN L181 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-31 17:07:44,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:44,878 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:07:44,879 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:44,917 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:44,985 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:45,026 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:45,068 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:45,111 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:45,187 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:07:45,188 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-31 17:07:45,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:45,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-31 17:07:45,249 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:45,334 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:07:45,334 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-31 17:07:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:45,397 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:07:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:45,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:07:45,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-31 17:07:45,457 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:07:45,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 17:07:45,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 17:07:45,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-31 17:07:45,458 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2019-01-31 17:07:45,792 WARN L181 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-01-31 17:07:46,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:07:46,807 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2019-01-31 17:07:46,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 17:07:46,807 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-31 17:07:46,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:07:46,810 INFO L225 Difference]: With dead ends: 62 [2019-01-31 17:07:46,810 INFO L226 Difference]: Without dead ends: 60 [2019-01-31 17:07:46,811 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:07:46,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-31 17:07:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2019-01-31 17:07:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-31 17:07:46,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2019-01-31 17:07:46,819 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2019-01-31 17:07:46,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:07:46,820 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2019-01-31 17:07:46,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 17:07:46,820 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2019-01-31 17:07:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-31 17:07:46,821 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:07:46,821 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-31 17:07:46,821 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:07:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:07:46,821 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2019-01-31 17:07:46,822 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:07:46,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:07:46,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:07:46,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:07:46,823 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:07:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:07:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:46,873 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-31 17:07:46,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-31 17:07:46,873 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-31 17:07:46,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-31 17:07:46,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-31 17:07:46,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-31 17:07:46,874 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2019-01-31 17:07:46,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:07:46,970 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2019-01-31 17:07:46,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-31 17:07:46,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-31 17:07:46,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:07:46,972 INFO L225 Difference]: With dead ends: 31 [2019-01-31 17:07:46,972 INFO L226 Difference]: Without dead ends: 30 [2019-01-31 17:07:46,972 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-31 17:07:46,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-31 17:07:46,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-01-31 17:07:46,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-31 17:07:46,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2019-01-31 17:07:46,980 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2019-01-31 17:07:46,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:07:46,980 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2019-01-31 17:07:46,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-31 17:07:46,981 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2019-01-31 17:07:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-31 17:07:46,981 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:07:46,981 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-31 17:07:46,982 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:07:46,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:07:46,982 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2019-01-31 17:07:46,982 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:07:46,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:07:46,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:07:46,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:07:46,984 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:07:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:07:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:47,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:07:47,052 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:07:47,052 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-31 17:07:47,053 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2019-01-31 17:07:47,054 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:07:47,054 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:07:47,063 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:07:47,063 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-31 17:07:47,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:07:47,064 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:07:47,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:07:47,064 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:07:47,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:07:47,076 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:07:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:07:47,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:07:47,204 WARN L181 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-31 17:07:47,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,209 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:07:47,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:07:47,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:07:47,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:07:47,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,479 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:07:47,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:47,595 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:07:47,596 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:47,641 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:47,684 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:47,754 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:47,853 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:47,945 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:48,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:07:48,010 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:07:48,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:07:48,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:07:48,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:07:48,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:07:48,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:07:48,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:07:48,148 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:48,235 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:48,279 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:48,314 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:48,339 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:48,497 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:48,514 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:48,530 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:48,606 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:07:48,606 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:121, output treesize:125 [2019-01-31 17:07:48,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:48,681 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-31 17:07:48,683 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:48,810 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:07:48,811 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-31 17:07:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:48,844 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:07:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:48,875 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-31 17:07:48,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-31 17:07:48,875 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-31 17:07:48,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-31 17:07:48,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-31 17:07:48,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-31 17:07:48,876 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2019-01-31 17:07:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:07:48,957 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2019-01-31 17:07:48,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-31 17:07:48,958 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-31 17:07:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:07:48,959 INFO L225 Difference]: With dead ends: 32 [2019-01-31 17:07:48,959 INFO L226 Difference]: Without dead ends: 31 [2019-01-31 17:07:48,960 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-31 17:07:48,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-01-31 17:07:48,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-01-31 17:07:48,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-31 17:07:48,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2019-01-31 17:07:48,969 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2019-01-31 17:07:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:07:48,970 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2019-01-31 17:07:48,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-31 17:07:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2019-01-31 17:07:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-31 17:07:48,971 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:07:48,971 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-31 17:07:48,971 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:07:48,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:07:48,972 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2019-01-31 17:07:48,972 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:07:48,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:07:48,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:07:48,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:07:48,973 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:07:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:07:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:49,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:07:49,218 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:07:49,219 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-31 17:07:49,219 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2019-01-31 17:07:49,220 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:07:49,220 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:07:49,230 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:07:49,230 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-31 17:07:49,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:07:49,230 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:07:49,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:07:49,231 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:07:49,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:07:49,250 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:07:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:07:49,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:07:49,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:07:49,329 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:07:49,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:07:49,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:07:49,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:07:49,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:07:49,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:49,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:07:49,591 INFO L303 Elim1Store]: Index analysis took 164 ms [2019-01-31 17:07:49,593 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:07:49,595 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:49,886 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:49,933 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:49,971 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:49,999 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:50,023 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:50,043 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:50,062 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:50,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:07:50,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:07:50,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,227 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:07:50,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,389 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:07:50,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:07:50,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:50,582 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:07:50,583 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:50,889 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:50,932 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:50,978 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:51,026 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:51,075 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:51,151 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:07:51,152 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-31 17:07:51,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:51,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-31 17:07:51,229 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:51,302 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:07:51,303 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-31 17:07:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:51,320 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:07:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:51,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:07:51,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-31 17:07:51,353 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:07:51,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 17:07:51,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 17:07:51,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-31 17:07:51,354 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2019-01-31 17:07:52,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:07:52,249 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2019-01-31 17:07:52,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 17:07:52,249 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-31 17:07:52,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:07:52,250 INFO L225 Difference]: With dead ends: 65 [2019-01-31 17:07:52,250 INFO L226 Difference]: Without dead ends: 64 [2019-01-31 17:07:52,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:07:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-01-31 17:07:52,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2019-01-31 17:07:52,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-31 17:07:52,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2019-01-31 17:07:52,262 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2019-01-31 17:07:52,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:07:52,262 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2019-01-31 17:07:52,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 17:07:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2019-01-31 17:07:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-31 17:07:52,263 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:07:52,263 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-31 17:07:52,263 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:07:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:07:52,264 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2019-01-31 17:07:52,264 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:07:52,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:07:52,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:07:52,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:07:52,265 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:07:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:07:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:52,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:07:52,344 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:07:52,344 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-31 17:07:52,345 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2019-01-31 17:07:52,346 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:07:52,347 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:07:52,355 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:07:52,355 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 84 root evaluator evaluations with a maximum evaluation depth of 2. Performed 84 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-31 17:07:52,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:07:52,356 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:07:52,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:07:52,356 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:07:52,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:07:52,367 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:07:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:07:52,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:07:52,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:07:52,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:07:52,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:07:52,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:07:52,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,454 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:07:52,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,589 INFO L303 Elim1Store]: Index analysis took 132 ms [2019-01-31 17:07:52,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:07:52,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:52,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:07:52,651 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:07:52,652 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:52,873 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:52,921 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:52,959 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:52,988 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:53,020 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:53,041 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:53,059 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:53,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:07:53,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,156 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:07:53,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:07:53,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:07:53,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,365 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:07:53,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:07:53,470 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:53,513 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:53,552 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:53,590 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:53,635 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:53,686 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:53,760 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:07:53,760 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-31 17:07:53,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:53,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-31 17:07:53,806 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:53,875 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:07:53,876 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-31 17:07:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:53,892 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:07:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:53,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:07:53,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-31 17:07:53,922 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:07:53,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 17:07:53,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 17:07:53,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-31 17:07:53,923 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2019-01-31 17:07:54,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:07:54,637 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2019-01-31 17:07:54,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 17:07:54,637 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-31 17:07:54,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:07:54,639 INFO L225 Difference]: With dead ends: 67 [2019-01-31 17:07:54,639 INFO L226 Difference]: Without dead ends: 65 [2019-01-31 17:07:54,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:07:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-01-31 17:07:54,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2019-01-31 17:07:54,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-01-31 17:07:54,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 132 transitions. [2019-01-31 17:07:54,648 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 132 transitions. Word has length 3 [2019-01-31 17:07:54,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:07:54,649 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 132 transitions. [2019-01-31 17:07:54,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 17:07:54,649 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 132 transitions. [2019-01-31 17:07:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:07:54,649 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:07:54,650 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:07:54,650 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:07:54,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:07:54,650 INFO L82 PathProgramCache]: Analyzing trace with hash 954866, now seen corresponding path program 1 times [2019-01-31 17:07:54,650 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:07:54,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:07:54,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:07:54,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:07:54,651 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:07:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:07:54,841 WARN L181 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-31 17:07:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:54,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:07:54,852 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:07:54,852 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:07:54,853 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [35] [2019-01-31 17:07:54,854 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:07:54,854 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:07:54,860 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:07:54,860 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:07:54,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:07:54,861 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:07:54,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:07:54,861 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:07:54,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:07:54,871 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:07:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:07:54,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:07:54,915 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:07:54,923 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:07:54,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:54,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:54,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:07:54,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:54,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:54,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:54,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:07:54,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:54,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:54,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:54,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:54,954 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:07:54,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:54,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:54,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:54,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:54,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:54,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:07:54,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:54,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:54,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,007 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:07:55,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:07:55,026 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:55,222 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:55,324 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:55,360 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:55,387 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:55,413 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:55,434 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:55,451 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:55,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-31 17:07:55,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-31 17:07:55,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,687 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-31 17:07:55,810 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-31 17:07:55,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,824 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-31 17:07:55,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:55,945 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:07:56,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,058 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:07:56,187 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:07:56,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:07:56,211 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:56,268 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:56,327 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:56,384 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:56,443 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:56,584 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:56,646 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:07:56,746 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:07:56,746 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-31 17:07:56,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:56,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:07:56,788 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:56,911 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:07:56,912 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-31 17:07:57,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:57,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:57,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:57,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:57,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:57,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:57,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:57,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:57,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:07:57,014 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:07:57,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-31 17:07:57,017 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:07:57,114 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:07:57,114 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-31 17:07:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:57,198 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:07:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:07:57,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:07:57,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:07:57,256 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:07:57,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:07:57,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:07:57,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:07:57,257 INFO L87 Difference]: Start difference. First operand 34 states and 132 transitions. Second operand 8 states. [2019-01-31 17:08:01,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:08:01,628 INFO L93 Difference]: Finished difference Result 82 states and 191 transitions. [2019-01-31 17:08:01,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:08:01,629 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:08:01,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:08:01,631 INFO L225 Difference]: With dead ends: 82 [2019-01-31 17:08:01,631 INFO L226 Difference]: Without dead ends: 80 [2019-01-31 17:08:01,632 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:08:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-31 17:08:01,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2019-01-31 17:08:01,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-01-31 17:08:01,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 128 transitions. [2019-01-31 17:08:01,641 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 128 transitions. Word has length 4 [2019-01-31 17:08:01,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:08:01,641 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 128 transitions. [2019-01-31 17:08:01,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:08:01,642 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 128 transitions. [2019-01-31 17:08:01,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:08:01,642 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:08:01,642 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:08:01,643 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:08:01,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:01,643 INFO L82 PathProgramCache]: Analyzing trace with hash 955426, now seen corresponding path program 1 times [2019-01-31 17:08:01,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:08:01,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:01,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:01,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:01,645 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:08:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:01,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:01,732 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:08:01,732 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:08:01,732 INFO L207 CegarAbsIntRunner]: [0], [32], [36], [37] [2019-01-31 17:08:01,733 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:08:01,733 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:08:01,741 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:08:01,741 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-31 17:08:01,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:01,742 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:08:01,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:01,742 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:08:01,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:01,751 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:08:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:01,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:08:01,783 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-31 17:08:01,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:01,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:01,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-31 17:08:01,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:01,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:01,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:01,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:01,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-31 17:08:01,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:01,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:01,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:01,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:01,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:01,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:01,997 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-31 17:08:02,101 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2019-01-31 17:08:02,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-31 17:08:02,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:02,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-31 17:08:02,287 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:02,343 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:02,398 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:02,456 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:02,518 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:02,576 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:02,696 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:08:02,701 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-31 17:08:02,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-31 17:08:02,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-31 17:08:02,776 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-31 17:08:02,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-31 17:08:02,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-31 17:08:02,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-31 17:08:02,823 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:02,877 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:02,919 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:02,951 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:02,976 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:02,996 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:03,012 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:03,029 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:03,104 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:03,104 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-31 17:08:03,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:03,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 149 [2019-01-31 17:08:03,852 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-31 17:08:03,909 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-31 17:08:05,842 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 54 dim-0 vars, and 9 xjuncts. [2019-01-31 17:08:05,842 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:131, output treesize:873 [2019-01-31 17:08:25,507 WARN L181 SmtUtils]: Spent 16.73 s on a formula simplification. DAG size of input: 478 DAG size of output: 101 [2019-01-31 17:08:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:25,513 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:08:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:25,537 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-31 17:08:25,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-31 17:08:25,537 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-31 17:08:25,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-31 17:08:25,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-31 17:08:25,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-31 17:08:25,538 INFO L87 Difference]: Start difference. First operand 36 states and 128 transitions. Second operand 4 states. [2019-01-31 17:08:25,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:08:25,597 INFO L93 Difference]: Finished difference Result 40 states and 140 transitions. [2019-01-31 17:08:25,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-31 17:08:25,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-31 17:08:25,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:08:25,598 INFO L225 Difference]: With dead ends: 40 [2019-01-31 17:08:25,598 INFO L226 Difference]: Without dead ends: 39 [2019-01-31 17:08:25,599 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-31 17:08:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-01-31 17:08:25,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-01-31 17:08:25,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-31 17:08:25,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 138 transitions. [2019-01-31 17:08:25,607 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 138 transitions. Word has length 4 [2019-01-31 17:08:25,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:08:25,607 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 138 transitions. [2019-01-31 17:08:25,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-31 17:08:25,607 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 138 transitions. [2019-01-31 17:08:25,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:08:25,608 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:08:25,608 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:08:25,608 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:08:25,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:25,609 INFO L82 PathProgramCache]: Analyzing trace with hash 954990, now seen corresponding path program 1 times [2019-01-31 17:08:25,609 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:08:25,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:25,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:25,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:25,610 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:08:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:25,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:25,953 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:08:25,953 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:08:25,953 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [35] [2019-01-31 17:08:25,954 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:08:25,954 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:08:25,959 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:08:25,960 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:08:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:25,960 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:08:25,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:25,960 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:08:25,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:25,983 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:08:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:25,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:08:26,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,069 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-31 17:08:26,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-31 17:08:26,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,219 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-31 17:08:26,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,307 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-31 17:08:26,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:08:26,528 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-31 17:08:26,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,553 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:08:26,738 WARN L181 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:08:26,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:26,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:08:26,772 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:26,845 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:26,922 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:27,009 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:27,092 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:27,166 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:27,248 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:27,339 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:08:27,343 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:08:27,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:08:27,351 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:08:27,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:08:27,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:08:27,380 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:08:27,398 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:08:27,399 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:27,756 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:27,803 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:27,842 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:27,869 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:27,893 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:27,912 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:27,929 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:28,030 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:28,030 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-31 17:08:28,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:28,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:08:28,067 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:28,168 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:28,169 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-31 17:08:28,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:28,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:28,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:28,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:28,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:28,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:28,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:28,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:28,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:28,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:28,209 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-31 17:08:28,213 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:28,339 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:28,339 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-31 17:08:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:28,425 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:08:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:28,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:08:28,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:08:28,494 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:08:28,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:08:28,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:08:28,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:08:28,495 INFO L87 Difference]: Start difference. First operand 38 states and 138 transitions. Second operand 8 states. [2019-01-31 17:08:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:08:32,476 INFO L93 Difference]: Finished difference Result 84 states and 220 transitions. [2019-01-31 17:08:32,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:08:32,477 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:08:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:08:32,478 INFO L225 Difference]: With dead ends: 84 [2019-01-31 17:08:32,479 INFO L226 Difference]: Without dead ends: 82 [2019-01-31 17:08:32,479 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:08:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-01-31 17:08:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2019-01-31 17:08:32,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-31 17:08:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-31 17:08:32,490 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-31 17:08:32,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:08:32,490 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-31 17:08:32,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:08:32,490 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-31 17:08:32,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:08:32,491 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:08:32,491 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:08:32,491 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:08:32,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:32,491 INFO L82 PathProgramCache]: Analyzing trace with hash 954618, now seen corresponding path program 1 times [2019-01-31 17:08:32,492 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:08:32,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:32,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:32,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:32,493 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:08:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:32,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:32,555 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:08:32,555 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:08:32,555 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [35] [2019-01-31 17:08:32,557 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:08:32,557 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:08:32,562 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:08:32,562 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:08:32,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:32,563 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:08:32,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:32,563 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:08:32,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:32,575 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:08:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:32,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:08:32,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:32,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-31 17:08:32,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:32,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:32,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-31 17:08:32,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:32,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:32,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:32,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:32,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-31 17:08:32,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:32,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:32,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:32,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:32,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:32,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:32,923 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-31 17:08:33,025 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-31 17:08:33,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:08:33,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,155 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:08:33,286 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:08:33,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:33,305 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:08:33,306 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:33,374 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:33,434 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:33,497 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:33,561 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:33,626 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:33,691 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:33,780 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:08:33,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:08:33,794 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:08:33,797 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:08:33,801 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:08:33,806 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:08:33,816 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:08:33,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:08:33,822 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:33,898 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:33,940 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:33,974 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:34,001 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:34,023 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:34,042 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:34,059 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:34,156 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:34,157 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-31 17:08:34,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:34,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:08:34,241 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:34,338 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:34,339 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-31 17:08:34,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:34,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:34,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:34,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:34,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:34,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:34,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:34,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:34,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:34,380 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:08:34,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-31 17:08:34,382 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:34,492 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:34,493 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-31 17:08:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:34,516 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:08:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:34,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:08:34,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:08:34,559 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:08:34,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:08:34,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:08:34,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:08:34,559 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-31 17:08:38,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:08:38,379 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-31 17:08:38,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:08:38,379 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:08:38,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:08:38,381 INFO L225 Difference]: With dead ends: 81 [2019-01-31 17:08:38,381 INFO L226 Difference]: Without dead ends: 80 [2019-01-31 17:08:38,382 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:08:38,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-31 17:08:38,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2019-01-31 17:08:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-31 17:08:38,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-31 17:08:38,392 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-31 17:08:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:08:38,392 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-31 17:08:38,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:08:38,392 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-31 17:08:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:08:38,393 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:08:38,393 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:08:38,393 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:08:38,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:38,394 INFO L82 PathProgramCache]: Analyzing trace with hash 955114, now seen corresponding path program 1 times [2019-01-31 17:08:38,394 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:08:38,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:38,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:38,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:38,395 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:08:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:38,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:38,739 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:08:38,739 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:08:38,739 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [35] [2019-01-31 17:08:38,740 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:08:38,740 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:08:38,745 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:08:38,745 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:08:38,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:38,746 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:08:38,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:38,746 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:08:38,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:38,765 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:08:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:38,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:08:38,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:38,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-31 17:08:38,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:38,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:38,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-31 17:08:38,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:38,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:38,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:38,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:38,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-31 17:08:39,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,048 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-31 17:08:39,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,150 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:08:39,252 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-31 17:08:39,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:08:39,411 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:08:39,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:39,436 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:08:39,437 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:39,535 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:39,605 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:39,678 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:39,756 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:39,827 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:39,906 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:40,005 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:08:40,010 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:08:40,014 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:08:40,018 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:08:40,023 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:08:40,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:08:40,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:08:40,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:08:40,040 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:40,123 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:40,168 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:40,203 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:40,230 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:40,252 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:40,272 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:40,289 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:40,389 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:40,389 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-31 17:08:40,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:40,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:08:40,429 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:40,529 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:40,530 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-31 17:08:40,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:40,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:40,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:40,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:40,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:40,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:40,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:40,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:40,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:40,584 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:08:40,585 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-31 17:08:40,586 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:40,688 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:40,688 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-31 17:08:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:40,836 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:08:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:40,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:08:40,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:08:40,878 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:08:40,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:08:40,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:08:40,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:08:40,879 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-31 17:08:42,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:08:42,433 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-31 17:08:42,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:08:42,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:08:42,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:08:42,434 INFO L225 Difference]: With dead ends: 81 [2019-01-31 17:08:42,434 INFO L226 Difference]: Without dead ends: 79 [2019-01-31 17:08:42,435 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:08:42,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-01-31 17:08:42,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2019-01-31 17:08:42,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-01-31 17:08:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 175 transitions. [2019-01-31 17:08:42,454 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 175 transitions. Word has length 4 [2019-01-31 17:08:42,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:08:42,456 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 175 transitions. [2019-01-31 17:08:42,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:08:42,456 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 175 transitions. [2019-01-31 17:08:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:08:42,457 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:08:42,457 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:08:42,457 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:08:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:42,457 INFO L82 PathProgramCache]: Analyzing trace with hash 954742, now seen corresponding path program 1 times [2019-01-31 17:08:42,457 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:08:42,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:42,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:42,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:42,459 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:08:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:43,196 WARN L181 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2019-01-31 17:08:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:43,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:43,253 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:08:43,253 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:08:43,253 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [35] [2019-01-31 17:08:43,255 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:08:43,256 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:08:43,260 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:08:43,260 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:08:43,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:43,261 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:08:43,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:43,261 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:08:43,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:43,270 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:08:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:43,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:08:43,353 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:08:43,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:08:43,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,363 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:08:43,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,379 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:08:43,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,389 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:08:43,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:08:43,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:08:43,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:43,621 INFO L303 Elim1Store]: Index analysis took 191 ms [2019-01-31 17:08:43,622 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:08:43,622 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:43,918 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:43,967 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:44,007 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:44,040 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:44,066 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:44,087 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:44,107 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:44,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-31 17:08:44,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-31 17:08:44,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-31 17:08:44,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-31 17:08:44,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:08:44,579 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-31 17:08:44,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:08:44,722 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:08:44,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:44,741 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:08:44,742 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:44,800 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:44,858 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:44,915 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:44,975 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:45,037 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:45,099 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:45,192 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:45,192 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-31 17:08:45,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:45,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:08:45,229 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:45,326 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:45,327 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-31 17:08:45,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:45,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:45,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:45,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:45,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:45,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:45,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:45,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:45,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:45,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:45,609 INFO L303 Elim1Store]: Index analysis took 195 ms [2019-01-31 17:08:45,610 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-31 17:08:45,610 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:45,708 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:45,709 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-31 17:08:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:45,793 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:08:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:45,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:08:45,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-31 17:08:45,846 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:08:45,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:08:45,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:08:45,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-31 17:08:45,847 INFO L87 Difference]: Start difference. First operand 44 states and 175 transitions. Second operand 8 states. [2019-01-31 17:08:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:08:49,535 INFO L93 Difference]: Finished difference Result 99 states and 274 transitions. [2019-01-31 17:08:49,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-31 17:08:49,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:08:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:08:49,537 INFO L225 Difference]: With dead ends: 99 [2019-01-31 17:08:49,537 INFO L226 Difference]: Without dead ends: 95 [2019-01-31 17:08:49,538 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-31 17:08:49,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-01-31 17:08:49,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2019-01-31 17:08:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-01-31 17:08:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 210 transitions. [2019-01-31 17:08:49,551 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 210 transitions. Word has length 4 [2019-01-31 17:08:49,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:08:49,552 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 210 transitions. [2019-01-31 17:08:49,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:08:49,552 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 210 transitions. [2019-01-31 17:08:49,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:08:49,553 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:08:49,553 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:08:49,553 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:08:49,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:49,553 INFO L82 PathProgramCache]: Analyzing trace with hash 941536, now seen corresponding path program 1 times [2019-01-31 17:08:49,553 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:08:49,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:49,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:49,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:49,554 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:08:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:49,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:49,660 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:08:49,660 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:08:49,660 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [35] [2019-01-31 17:08:49,661 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:08:49,661 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:08:49,665 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:08:49,666 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:08:49,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:49,666 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:08:49,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:49,667 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:08:49,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:49,679 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:08:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:49,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:08:49,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:08:49,727 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:08:49,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:08:49,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,743 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:08:49,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:08:49,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:08:49,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:49,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:08:49,813 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:08:49,814 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:49,875 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:49,926 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:49,962 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:49,989 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:50,014 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:50,034 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:50,053 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:50,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,104 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:08:50,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,152 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:08:50,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,207 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:08:50,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:08:50,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:08:50,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,454 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:08:50,455 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:50,516 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:50,557 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:50,600 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:50,643 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:50,685 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:50,789 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:50,790 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:08:50,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,836 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-31 17:08:50,836 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:50,903 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:50,903 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:08:50,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:50,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 134 [2019-01-31 17:08:50,945 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:51,014 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:51,015 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-31 17:08:51,246 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2019-01-31 17:08:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:51,248 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:08:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:51,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:08:51,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:08:51,755 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:08:51,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:08:51,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:08:51,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:08:51,756 INFO L87 Difference]: Start difference. First operand 52 states and 210 transitions. Second operand 8 states. [2019-01-31 17:08:52,325 WARN L181 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-01-31 17:08:53,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:08:53,415 INFO L93 Difference]: Finished difference Result 101 states and 289 transitions. [2019-01-31 17:08:53,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:08:53,416 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:08:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:08:53,417 INFO L225 Difference]: With dead ends: 101 [2019-01-31 17:08:53,418 INFO L226 Difference]: Without dead ends: 99 [2019-01-31 17:08:53,418 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:08:53,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-31 17:08:53,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2019-01-31 17:08:53,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-31 17:08:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 243 transitions. [2019-01-31 17:08:53,433 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 243 transitions. Word has length 4 [2019-01-31 17:08:53,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:08:53,433 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 243 transitions. [2019-01-31 17:08:53,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:08:53,433 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 243 transitions. [2019-01-31 17:08:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:08:53,435 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:08:53,435 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:08:53,436 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:08:53,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:53,436 INFO L82 PathProgramCache]: Analyzing trace with hash 941164, now seen corresponding path program 1 times [2019-01-31 17:08:53,436 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:08:53,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:53,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:53,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:53,437 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:08:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:53,583 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2019-01-31 17:08:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:53,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:53,596 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:08:53,596 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:08:53,596 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [35] [2019-01-31 17:08:53,598 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:08:53,598 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:08:53,601 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:08:53,601 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:08:53,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:53,602 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:08:53,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:53,602 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:08:53,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:53,611 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:08:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:53,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:08:53,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,654 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 91 treesize of output 91 [2019-01-31 17:08:53,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,703 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:08:53,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,756 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:08:53,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:08:53,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:53,905 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:08:54,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:08:54,025 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:54,067 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:54,110 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:54,153 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:54,197 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:54,241 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:54,296 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:08:54,301 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:08:54,304 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:08:54,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:08:54,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:08:54,341 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:08:54,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:08:54,401 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:08:54,402 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:54,458 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:54,502 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:54,534 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:54,560 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:54,579 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:54,597 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:54,614 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:54,689 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:54,689 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:08:54,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-31 17:08:54,743 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:54,810 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:54,811 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:08:54,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:54,848 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:08:54,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-31 17:08:54,850 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:54,920 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:54,920 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-31 17:08:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:54,949 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:08:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:54,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:08:54,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:08:54,993 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:08:54,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:08:54,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:08:54,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:08:54,994 INFO L87 Difference]: Start difference. First operand 59 states and 243 transitions. Second operand 8 states. [2019-01-31 17:08:55,564 WARN L181 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2019-01-31 17:08:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:08:56,330 INFO L93 Difference]: Finished difference Result 99 states and 302 transitions. [2019-01-31 17:08:56,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:08:56,331 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:08:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:08:56,332 INFO L225 Difference]: With dead ends: 99 [2019-01-31 17:08:56,333 INFO L226 Difference]: Without dead ends: 98 [2019-01-31 17:08:56,333 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:08:56,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-31 17:08:56,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2019-01-31 17:08:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-01-31 17:08:56,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 261 transitions. [2019-01-31 17:08:56,350 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 261 transitions. Word has length 4 [2019-01-31 17:08:56,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:08:56,350 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 261 transitions. [2019-01-31 17:08:56,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:08:56,350 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 261 transitions. [2019-01-31 17:08:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:08:56,351 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:08:56,351 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:08:56,351 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:08:56,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:56,351 INFO L82 PathProgramCache]: Analyzing trace with hash 941660, now seen corresponding path program 1 times [2019-01-31 17:08:56,351 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:08:56,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:56,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:56,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:56,353 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:08:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:56,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:56,421 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:08:56,422 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:08:56,422 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [35] [2019-01-31 17:08:56,423 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:08:56,423 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:08:56,427 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:08:56,427 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:08:56,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:56,427 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:08:56,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:56,428 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:08:56,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:56,440 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:08:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:56,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:08:56,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:08:56,489 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:08:56,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,495 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:08:56,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:08:56,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,514 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:08:56,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:08:56,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:08:56,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:08:56,561 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:56,622 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:56,669 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:56,706 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:56,736 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:56,758 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:56,779 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:56,818 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:56,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:08:56,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:08:56,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:56,970 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:08:57,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:08:57,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,127 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:08:57,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:08:57,238 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:57,312 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:57,353 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:57,395 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:57,438 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:57,480 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:57,555 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:57,555 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:08:57,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-31 17:08:57,614 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:57,682 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:57,683 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:08:57,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:57,721 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:08:57,722 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-31 17:08:57,723 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:57,794 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:08:57,795 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-31 17:08:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:58,013 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:08:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:58,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:08:58,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:08:58,200 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:08:58,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:08:58,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:08:58,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:08:58,201 INFO L87 Difference]: Start difference. First operand 61 states and 261 transitions. Second operand 8 states. [2019-01-31 17:08:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:08:58,844 INFO L93 Difference]: Finished difference Result 101 states and 320 transitions. [2019-01-31 17:08:58,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:08:58,845 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:08:58,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:08:58,846 INFO L225 Difference]: With dead ends: 101 [2019-01-31 17:08:58,846 INFO L226 Difference]: Without dead ends: 99 [2019-01-31 17:08:58,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:08:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-31 17:08:58,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2019-01-31 17:08:58,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-01-31 17:08:58,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 278 transitions. [2019-01-31 17:08:58,861 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 278 transitions. Word has length 4 [2019-01-31 17:08:58,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:08:58,861 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 278 transitions. [2019-01-31 17:08:58,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:08:58,862 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 278 transitions. [2019-01-31 17:08:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:08:58,862 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:08:58,863 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:08:58,863 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:08:58,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:58,863 INFO L82 PathProgramCache]: Analyzing trace with hash 941288, now seen corresponding path program 1 times [2019-01-31 17:08:58,863 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:08:58,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:58,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:58,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:08:58,864 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:08:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:08:58,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:58,973 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:08:58,973 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:08:58,973 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [35] [2019-01-31 17:08:58,974 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:08:58,974 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:08:58,978 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:08:58,979 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:08:58,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:08:58,979 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:08:58,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:08:58,979 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:08:58,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:08:58,992 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:08:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:08:59,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:08:59,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:08:59,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:08:59,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:08:59,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:08:59,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:08:59,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:08:59,556 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:08:59,557 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:59,605 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:59,650 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:59,691 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:59,734 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:59,778 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:59,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:08:59,836 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:08:59,839 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:08:59,843 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:08:59,846 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:08:59,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:08:59,853 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:08:59,865 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:08:59,866 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:08:59,921 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:59,965 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:08:59,999 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:00,025 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:00,047 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:00,065 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:00,081 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:00,154 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:00,155 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:09:00,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:00,207 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-31 17:09:00,208 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:00,274 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:00,274 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:09:00,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:00,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:00,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:00,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:00,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:00,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:00,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:00,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:00,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:00,343 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-31 17:09:00,344 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:00,414 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:00,414 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-31 17:09:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:00,436 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:09:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:00,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:09:00,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:09:00,477 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:09:00,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:09:00,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:09:00,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:09:00,478 INFO L87 Difference]: Start difference. First operand 62 states and 278 transitions. Second operand 8 states. [2019-01-31 17:09:01,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:09:01,151 INFO L93 Difference]: Finished difference Result 106 states and 350 transitions. [2019-01-31 17:09:01,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:09:01,152 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:09:01,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:09:01,154 INFO L225 Difference]: With dead ends: 106 [2019-01-31 17:09:01,155 INFO L226 Difference]: Without dead ends: 104 [2019-01-31 17:09:01,155 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-01-31 17:09:01,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-01-31 17:09:01,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2019-01-31 17:09:01,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-01-31 17:09:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 304 transitions. [2019-01-31 17:09:01,170 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 304 transitions. Word has length 4 [2019-01-31 17:09:01,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:09:01,170 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 304 transitions. [2019-01-31 17:09:01,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:09:01,171 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 304 transitions. [2019-01-31 17:09:01,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:09:01,171 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:09:01,172 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:09:01,172 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:09:01,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:01,172 INFO L82 PathProgramCache]: Analyzing trace with hash 941784, now seen corresponding path program 1 times [2019-01-31 17:09:01,172 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:09:01,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:01,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:01,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:01,173 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:09:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:01,316 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-31 17:09:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:01,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:01,331 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:09:01,331 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:09:01,331 INFO L207 CegarAbsIntRunner]: [0], [18], [30], [35] [2019-01-31 17:09:01,333 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:09:01,333 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:09:01,337 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:09:01,337 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:09:01,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:01,338 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:09:01,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:01,338 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:09:01,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:01,350 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:09:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:01,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:09:01,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:09:01,393 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:09:01,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,397 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:09:01,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:09:01,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:09:01,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:09:01,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,437 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:09:01,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:09:01,452 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:01,513 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:01,559 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:01,597 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:01,625 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:01,648 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:01,668 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:01,686 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:01,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:09:01,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,783 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:09:01,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,837 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:09:01,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:09:01,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:01,989 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:09:02,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,100 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:09:02,101 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:02,138 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:02,183 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:02,224 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:02,266 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:02,307 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:02,402 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:02,403 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:09:02,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-31 17:09:02,457 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:02,522 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:02,522 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:09:02,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:02,765 INFO L303 Elim1Store]: Index analysis took 219 ms [2019-01-31 17:09:02,766 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 142 [2019-01-31 17:09:02,766 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:02,857 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:02,858 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-31 17:09:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:02,894 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:09:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:02,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:09:02,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:09:02,935 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:09:02,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:09:02,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:09:02,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:09:02,936 INFO L87 Difference]: Start difference. First operand 65 states and 304 transitions. Second operand 8 states. [2019-01-31 17:09:03,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:09:03,659 INFO L93 Difference]: Finished difference Result 107 states and 376 transitions. [2019-01-31 17:09:03,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:09:03,660 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:09:03,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:09:03,661 INFO L225 Difference]: With dead ends: 107 [2019-01-31 17:09:03,661 INFO L226 Difference]: Without dead ends: 99 [2019-01-31 17:09:03,661 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:09:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-31 17:09:03,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-01-31 17:09:03,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-01-31 17:09:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 328 transitions. [2019-01-31 17:09:03,675 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 328 transitions. Word has length 4 [2019-01-31 17:09:03,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:09:03,676 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 328 transitions. [2019-01-31 17:09:03,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:09:03,676 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 328 transitions. [2019-01-31 17:09:03,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:09:03,677 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:09:03,677 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:09:03,677 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:09:03,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:03,677 INFO L82 PathProgramCache]: Analyzing trace with hash 930314, now seen corresponding path program 1 times [2019-01-31 17:09:03,677 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:09:03,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:03,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:03,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:03,678 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:09:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:03,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:03,794 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:09:03,794 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:09:03,795 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [35] [2019-01-31 17:09:03,796 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:09:03,796 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:09:03,800 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:09:03,800 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:09:03,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:03,801 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:09:03,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:03,801 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:09:03,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:03,810 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:09:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:03,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:09:03,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:03,856 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:09:03,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:03,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:03,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:09:03,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:03,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:03,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:03,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:03,960 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:09:04,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,029 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:09:04,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:09:04,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:04,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:09:04,216 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:04,264 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:04,307 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:04,356 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:04,400 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:04,443 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:04,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:09:04,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:09:04,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:09:04,508 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:09:04,511 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:09:04,515 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:09:04,519 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:09:04,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:09:04,531 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:04,610 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:04,699 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:04,875 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:04,901 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:04,922 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:04,941 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:04,958 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:05,028 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:05,029 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-31 17:09:05,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:05,071 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 135 [2019-01-31 17:09:05,073 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-31 17:09:05,291 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 12 dim-0 vars, and 2 xjuncts. [2019-01-31 17:09:05,292 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:201 [2019-01-31 17:09:05,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:05,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:05,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:05,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:05,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:05,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:05,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:05,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:05,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:05,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:05,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 12 case distinctions, treesize of input 111 treesize of output 165 [2019-01-31 17:09:05,427 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-01-31 17:09:05,442 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2019-01-31 17:09:06,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:06,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:06,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:06,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:06,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:06,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:06,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:06,497 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:09:06,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 126 [2019-01-31 17:09:06,501 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:06,904 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 2 dim-1 vars, End of recursive call: 49 dim-0 vars, and 8 xjuncts. [2019-01-31 17:09:06,905 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:218, output treesize:686 [2019-01-31 17:09:07,819 WARN L181 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 114 [2019-01-31 17:09:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:07,821 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:09:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:07,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:09:07,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-01-31 17:09:07,847 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:09:07,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:09:07,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:09:07,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:09:07,848 INFO L87 Difference]: Start difference. First operand 66 states and 328 transitions. Second operand 8 states. [2019-01-31 17:09:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:09:11,952 INFO L93 Difference]: Finished difference Result 155 states and 556 transitions. [2019-01-31 17:09:11,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-31 17:09:11,953 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:09:11,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:09:11,955 INFO L225 Difference]: With dead ends: 155 [2019-01-31 17:09:11,955 INFO L226 Difference]: Without dead ends: 152 [2019-01-31 17:09:11,956 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-31 17:09:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-01-31 17:09:11,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2019-01-31 17:09:11,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-01-31 17:09:11,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 438 transitions. [2019-01-31 17:09:11,975 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 438 transitions. Word has length 4 [2019-01-31 17:09:11,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:09:11,975 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 438 transitions. [2019-01-31 17:09:11,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:09:11,975 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 438 transitions. [2019-01-31 17:09:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:09:11,976 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:09:11,976 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:09:11,976 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:09:11,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:11,976 INFO L82 PathProgramCache]: Analyzing trace with hash 930440, now seen corresponding path program 1 times [2019-01-31 17:09:11,977 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:09:11,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:11,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:11,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:11,978 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:09:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:12,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:12,153 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:09:12,154 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:09:12,154 INFO L207 CegarAbsIntRunner]: [0], [6], [36], [37] [2019-01-31 17:09:12,155 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:09:12,155 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:09:12,158 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:09:12,158 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-31 17:09:12,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:12,158 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:09:12,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:12,158 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:09:12,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:12,180 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:09:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:12,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:09:12,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:09:12,243 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:09:12,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:09:12,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:09:12,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,264 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:09:12,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,274 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:09:12,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,291 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:09:12,302 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:09:12,303 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:12,360 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:12,404 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:12,439 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:12,468 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:12,491 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:12,510 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:12,528 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:12,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:09:12,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:09:12,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:09:12,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:09:12,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,815 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:09:12,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:12,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:09:12,915 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:12,953 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:12,990 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:13,029 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:13,067 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:13,106 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:13,173 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:13,174 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-31 17:09:13,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-31 17:09:13,209 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:13,273 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:13,274 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-31 17:09:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:13,293 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:09:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:13,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:09:13,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-31 17:09:13,320 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:09:13,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 17:09:13,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 17:09:13,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-31 17:09:13,321 INFO L87 Difference]: Start difference. First operand 78 states and 438 transitions. Second operand 6 states. [2019-01-31 17:09:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:09:13,636 INFO L93 Difference]: Finished difference Result 104 states and 471 transitions. [2019-01-31 17:09:13,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 17:09:13,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-31 17:09:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:09:13,637 INFO L225 Difference]: With dead ends: 104 [2019-01-31 17:09:13,638 INFO L226 Difference]: Without dead ends: 103 [2019-01-31 17:09:13,638 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:09:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-01-31 17:09:13,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2019-01-31 17:09:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-31 17:09:13,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-31 17:09:13,654 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-31 17:09:13,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:09:13,654 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-31 17:09:13,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 17:09:13,654 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-31 17:09:13,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:09:13,655 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:09:13,655 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:09:13,655 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:09:13,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:13,655 INFO L82 PathProgramCache]: Analyzing trace with hash 945816, now seen corresponding path program 1 times [2019-01-31 17:09:13,656 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:09:13,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:13,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:13,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:13,656 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:09:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:13,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:13,695 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:09:13,695 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:09:13,695 INFO L207 CegarAbsIntRunner]: [0], [22], [36], [37] [2019-01-31 17:09:13,696 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:09:13,697 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:09:13,700 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:09:13,700 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-31 17:09:13,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:13,700 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:09:13,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:13,700 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:09:13,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:13,710 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:09:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:13,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:09:13,721 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:09:13,725 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-31 17:09:13,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-31 17:09:13,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-31 17:09:13,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,768 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-31 17:09:13,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-31 17:09:13,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:13,799 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-31 17:09:13,810 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-31 17:09:13,811 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:13,865 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:13,907 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:13,940 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:13,965 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:13,985 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:14,002 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:14,020 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:14,058 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-31 17:09:14,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-31 17:09:14,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-31 17:09:14,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-31 17:09:14,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-31 17:09:14,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-31 17:09:14,354 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:14,389 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:14,424 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:14,460 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:14,497 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:14,535 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:14,599 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:14,599 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-31 17:09:14,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:14,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-31 17:09:14,631 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:14,692 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:14,692 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-31 17:09:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:14,711 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:09:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:14,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:09:14,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-31 17:09:14,740 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:09:14,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 17:09:14,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 17:09:14,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-31 17:09:14,741 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 6 states. [2019-01-31 17:09:15,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:09:15,068 INFO L93 Difference]: Finished difference Result 108 states and 483 transitions. [2019-01-31 17:09:15,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 17:09:15,068 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-31 17:09:15,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:09:15,070 INFO L225 Difference]: With dead ends: 108 [2019-01-31 17:09:15,070 INFO L226 Difference]: Without dead ends: 107 [2019-01-31 17:09:15,070 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:09:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-01-31 17:09:15,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2019-01-31 17:09:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-31 17:09:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-31 17:09:15,086 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-31 17:09:15,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:09:15,087 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-31 17:09:15,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 17:09:15,087 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-31 17:09:15,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:09:15,087 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:09:15,087 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:09:15,088 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:09:15,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:15,088 INFO L82 PathProgramCache]: Analyzing trace with hash 945008, now seen corresponding path program 1 times [2019-01-31 17:09:15,088 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:09:15,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:15,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:15,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:15,089 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:09:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:15,267 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2019-01-31 17:09:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:15,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:15,293 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:09:15,293 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:09:15,293 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [35] [2019-01-31 17:09:15,294 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:09:15,294 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:09:15,298 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:09:15,298 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:09:15,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:15,299 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:09:15,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:15,299 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:09:15,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:15,313 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:09:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:15,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:09:15,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,427 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:09:15,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:09:15,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,526 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:09:15,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:09:15,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,666 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:09:15,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:15,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:09:15,763 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:15,803 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:15,842 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:15,881 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:15,922 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:15,963 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:16,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:09:16,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:09:16,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:09:16,023 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:09:16,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:09:16,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:09:16,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:09:16,048 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:09:16,049 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:16,101 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:16,144 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:16,175 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:16,200 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:16,219 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:16,253 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:16,267 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:16,334 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:16,334 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:09:16,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:16,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-31 17:09:16,381 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:16,444 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:16,445 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:09:16,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:16,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:16,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:16,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:16,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:16,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:16,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:16,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:16,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:16,717 INFO L303 Elim1Store]: Index analysis took 246 ms [2019-01-31 17:09:16,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-31 17:09:16,718 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:16,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:16,839 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-31 17:09:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:16,862 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:09:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:16,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:09:16,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-31 17:09:16,908 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:09:16,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:09:16,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:09:16,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-01-31 17:09:16,909 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 8 states. [2019-01-31 17:09:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:09:18,815 INFO L93 Difference]: Finished difference Result 154 states and 652 transitions. [2019-01-31 17:09:18,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-31 17:09:18,818 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:09:18,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:09:18,819 INFO L225 Difference]: With dead ends: 154 [2019-01-31 17:09:18,819 INFO L226 Difference]: Without dead ends: 153 [2019-01-31 17:09:18,820 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:09:18,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-01-31 17:09:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2019-01-31 17:09:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-01-31 17:09:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 556 transitions. [2019-01-31 17:09:18,841 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 556 transitions. Word has length 4 [2019-01-31 17:09:18,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:09:18,841 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 556 transitions. [2019-01-31 17:09:18,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:09:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 556 transitions. [2019-01-31 17:09:18,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:09:18,842 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:09:18,842 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:09:18,842 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:09:18,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:18,842 INFO L82 PathProgramCache]: Analyzing trace with hash 945504, now seen corresponding path program 1 times [2019-01-31 17:09:18,843 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:09:18,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:18,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:18,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:18,843 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:09:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:18,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:18,970 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:09:18,970 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:09:18,970 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [35] [2019-01-31 17:09:18,971 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:09:18,972 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:09:18,974 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:09:18,974 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:09:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:18,975 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:09:18,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:18,975 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:09:18,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:18,987 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:09:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:18,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:09:19,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:09:19,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:09:19,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:09:19,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,047 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:09:19,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:09:19,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:09:19,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:09:19,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:09:19,122 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:19,178 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:19,224 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:19,259 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:19,287 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:19,310 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:19,328 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:19,346 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:19,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,389 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:09:19,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:09:19,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:09:19,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,548 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:09:19,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,626 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:09:19,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:19,724 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:09:19,724 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:19,762 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:19,799 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:19,842 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:19,881 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:19,920 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:19,987 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:19,988 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:09:20,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:20,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-31 17:09:20,033 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:20,096 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:20,096 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:09:20,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:20,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:20,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:20,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:20,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:20,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:20,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:20,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:20,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:20,130 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-31 17:09:20,131 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:20,198 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:20,198 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-31 17:09:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:20,220 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:09:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:20,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:09:20,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-31 17:09:20,271 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:09:20,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:09:20,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:09:20,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-31 17:09:20,272 INFO L87 Difference]: Start difference. First operand 92 states and 556 transitions. Second operand 8 states. [2019-01-31 17:09:20,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:09:20,959 INFO L93 Difference]: Finished difference Result 148 states and 688 transitions. [2019-01-31 17:09:20,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-31 17:09:20,959 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:09:20,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:09:20,961 INFO L225 Difference]: With dead ends: 148 [2019-01-31 17:09:20,961 INFO L226 Difference]: Without dead ends: 146 [2019-01-31 17:09:20,962 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:09:20,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-01-31 17:09:20,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-01-31 17:09:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-01-31 17:09:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 590 transitions. [2019-01-31 17:09:20,990 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 590 transitions. Word has length 4 [2019-01-31 17:09:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:09:20,990 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 590 transitions. [2019-01-31 17:09:20,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:09:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 590 transitions. [2019-01-31 17:09:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:09:20,991 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:09:20,991 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:09:20,991 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:09:20,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:20,992 INFO L82 PathProgramCache]: Analyzing trace with hash 933972, now seen corresponding path program 1 times [2019-01-31 17:09:20,992 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:09:20,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:20,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:20,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:20,993 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:09:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:21,189 WARN L181 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2019-01-31 17:09:21,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:21,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:21,218 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:09:21,219 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:09:21,219 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [35] [2019-01-31 17:09:21,220 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:09:21,220 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:09:21,222 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:09:21,223 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:09:21,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:21,223 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:09:21,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:21,223 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:09:21,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:21,233 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:09:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:21,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:09:21,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:09:21,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:09:21,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:09:21,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:09:21,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,305 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:09:21,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:09:21,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:09:21,346 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:09:21,347 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:21,404 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:21,449 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:21,483 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:21,510 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:21,533 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:21,552 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:21,570 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:21,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:09:21,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:09:21,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:09:21,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,774 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:09:21,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:09:21,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:21,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:09:21,952 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:21,990 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:22,028 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:22,071 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:22,110 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:22,149 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:22,217 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:22,218 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:09:22,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:22,269 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-31 17:09:22,270 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:22,331 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:22,332 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:09:22,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:22,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:22,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:22,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:22,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:22,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:22,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:22,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:22,362 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:09:22,363 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 141 [2019-01-31 17:09:22,364 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:22,430 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:22,431 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:82 [2019-01-31 17:09:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:22,451 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:09:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:22,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:09:22,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-31 17:09:22,491 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:09:22,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:09:22,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:09:22,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-31 17:09:22,492 INFO L87 Difference]: Start difference. First operand 103 states and 590 transitions. Second operand 8 states. [2019-01-31 17:09:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:09:23,188 INFO L93 Difference]: Finished difference Result 145 states and 646 transitions. [2019-01-31 17:09:23,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-31 17:09:23,189 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:09:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:09:23,191 INFO L225 Difference]: With dead ends: 145 [2019-01-31 17:09:23,191 INFO L226 Difference]: Without dead ends: 143 [2019-01-31 17:09:23,192 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:09:23,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-01-31 17:09:23,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2019-01-31 17:09:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-31 17:09:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 599 transitions. [2019-01-31 17:09:23,215 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 599 transitions. Word has length 4 [2019-01-31 17:09:23,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:09:23,215 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 599 transitions. [2019-01-31 17:09:23,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:09:23,216 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 599 transitions. [2019-01-31 17:09:23,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:09:23,216 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:09:23,216 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:09:23,217 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:09:23,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:23,217 INFO L82 PathProgramCache]: Analyzing trace with hash 938128, now seen corresponding path program 1 times [2019-01-31 17:09:23,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:09:23,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:23,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:23,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:23,218 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:09:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:23,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:23,337 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:09:23,337 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:09:23,338 INFO L207 CegarAbsIntRunner]: [0], [14], [36], [37] [2019-01-31 17:09:23,338 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:09:23,338 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:09:23,340 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:09:23,340 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-31 17:09:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:23,341 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:09:23,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:23,341 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:09:23,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:23,349 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:09:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:23,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:09:23,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:09:23,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-31 17:09:23,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-31 17:09:23,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-31 17:09:23,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,386 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-31 17:09:23,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-31 17:09:23,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,414 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-31 17:09:23,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-31 17:09:23,427 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:23,478 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:23,518 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:23,550 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:23,575 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:23,597 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:23,615 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:23,632 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:23,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-31 17:09:23,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,696 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-31 17:09:23,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-31 17:09:23,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,804 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-31 17:09:23,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,877 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-31 17:09:23,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:23,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-31 17:09:23,971 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:24,004 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:24,038 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:24,074 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:24,110 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:24,155 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:24,220 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:24,220 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-31 17:09:24,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:24,255 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-31 17:09:24,256 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:24,315 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:24,316 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-31 17:09:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:24,362 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:09:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:24,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:09:24,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-31 17:09:24,394 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:09:24,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 17:09:24,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 17:09:24,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-31 17:09:24,395 INFO L87 Difference]: Start difference. First operand 104 states and 599 transitions. Second operand 6 states. [2019-01-31 17:09:24,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:09:24,857 INFO L93 Difference]: Finished difference Result 124 states and 613 transitions. [2019-01-31 17:09:24,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 17:09:24,857 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-31 17:09:24,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:09:24,859 INFO L225 Difference]: With dead ends: 124 [2019-01-31 17:09:24,859 INFO L226 Difference]: Without dead ends: 123 [2019-01-31 17:09:24,860 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:09:24,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-01-31 17:09:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2019-01-31 17:09:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-31 17:09:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-01-31 17:09:24,877 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 4 [2019-01-31 17:09:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:09:24,877 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-01-31 17:09:24,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 17:09:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-01-31 17:09:24,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:09:24,878 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:09:24,878 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:09:24,879 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:09:24,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:24,879 INFO L82 PathProgramCache]: Analyzing trace with hash 937816, now seen corresponding path program 1 times [2019-01-31 17:09:24,879 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:09:24,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:24,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:24,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:24,880 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:09:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:25,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:25,047 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:09:25,047 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:09:25,048 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [35] [2019-01-31 17:09:25,049 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:09:25,049 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:09:25,052 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:09:25,052 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:09:25,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:25,052 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:09:25,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:25,053 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:09:25,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:25,062 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:09:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:25,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:09:25,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:09:25,113 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:09:25,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:09:25,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:09:25,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:09:25,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,144 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:09:25,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:09:25,169 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:09:25,170 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:25,227 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:25,271 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:25,312 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:25,340 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:25,363 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:25,383 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:25,400 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:25,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,442 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:09:25,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,487 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:09:25,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:09:25,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,599 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:09:25,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:09:25,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:25,774 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:09:25,775 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:25,812 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:25,849 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:25,887 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:25,926 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:25,965 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:26,029 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:26,030 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:09:26,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:26,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-31 17:09:26,148 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:26,211 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:26,212 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-31 17:09:26,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:26,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:26,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:26,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:26,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:26,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:26,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:26,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:26,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:26,332 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 140 [2019-01-31 17:09:26,333 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:26,810 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:26,811 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-31 17:09:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:26,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:09:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:26,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:09:26,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-31 17:09:26,879 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:09:26,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:09:26,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:09:26,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-31 17:09:26,880 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 8 states. [2019-01-31 17:09:27,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:09:27,777 INFO L93 Difference]: Finished difference Result 176 states and 800 transitions. [2019-01-31 17:09:27,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-31 17:09:27,778 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-31 17:09:27,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:09:27,780 INFO L225 Difference]: With dead ends: 176 [2019-01-31 17:09:27,780 INFO L226 Difference]: Without dead ends: 174 [2019-01-31 17:09:27,781 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-01-31 17:09:27,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-01-31 17:09:27,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2019-01-31 17:09:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-31 17:09:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-31 17:09:27,808 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-31 17:09:27,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:09:27,808 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-31 17:09:27,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-31 17:09:27,808 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-31 17:09:27,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-31 17:09:27,809 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:09:27,809 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-31 17:09:27,809 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:09:27,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:27,809 INFO L82 PathProgramCache]: Analyzing trace with hash 953504, now seen corresponding path program 1 times [2019-01-31 17:09:27,810 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:09:27,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:27,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:27,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:27,810 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:09:27,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:27,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:27,922 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:09:27,922 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-31 17:09:27,922 INFO L207 CegarAbsIntRunner]: [0], [30], [36], [37] [2019-01-31 17:09:27,923 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:09:27,923 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:09:27,926 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:09:27,926 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 2. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-31 17:09:27,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:27,926 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:09:27,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:27,926 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:09:27,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:27,936 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:09:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:27,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:09:27,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-31 17:09:27,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:27,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:27,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-31 17:09:28,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-31 17:09:28,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-31 17:09:28,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,150 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-31 17:09:28,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-31 17:09:28,246 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:28,284 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:28,322 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:28,360 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:28,399 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:28,440 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:28,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:09:28,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-31 17:09:28,498 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-31 17:09:28,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-31 17:09:28,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-31 17:09:28,512 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-31 17:09:28,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-31 17:09:28,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-31 17:09:28,532 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:28,582 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:28,622 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:28,649 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:28,675 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:28,694 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:28,710 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:28,725 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:28,789 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:28,790 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-31 17:09:28,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:28,825 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-31 17:09:28,826 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:28,892 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:28,892 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-31 17:09:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:28,939 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:09:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:28,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:09:28,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-31 17:09:28,966 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:09:28,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-31 17:09:28,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-31 17:09:28,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-31 17:09:28,967 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 6 states. [2019-01-31 17:09:29,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:09:29,247 INFO L93 Difference]: Finished difference Result 135 states and 696 transitions. [2019-01-31 17:09:29,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-31 17:09:29,248 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-31 17:09:29,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:09:29,250 INFO L225 Difference]: With dead ends: 135 [2019-01-31 17:09:29,250 INFO L226 Difference]: Without dead ends: 134 [2019-01-31 17:09:29,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-31 17:09:29,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-01-31 17:09:29,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2019-01-31 17:09:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-31 17:09:29,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-31 17:09:29,277 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-31 17:09:29,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:09:29,278 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-31 17:09:29,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-31 17:09:29,278 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-31 17:09:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-31 17:09:29,278 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:09:29,279 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-31 17:09:29,279 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:09:29,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:29,279 INFO L82 PathProgramCache]: Analyzing trace with hash 29600478, now seen corresponding path program 1 times [2019-01-31 17:09:29,279 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:09:29,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:29,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:29,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:29,280 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:09:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:29,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:29,517 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:09:29,517 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-31 17:09:29,517 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [35] [2019-01-31 17:09:29,518 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:09:29,518 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:09:29,521 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:09:29,521 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-31 17:09:29,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:29,522 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:09:29,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:29,522 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:09:29,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:29,531 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:09:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:29,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:09:29,657 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-31 17:09:29,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:09:29,662 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:09:29,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,668 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:09:29,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:09:29,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,684 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:09:29,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:09:29,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,706 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:09:29,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:29,719 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:09:29,720 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:29,794 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:29,840 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:29,875 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:29,904 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:29,928 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:29,948 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:29,965 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:30,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,011 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-31 17:09:30,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,063 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-31 17:09:30,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,123 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-31 17:09:30,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,194 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-31 17:09:30,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:09:30,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,393 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:09:30,514 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:09:30,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:09:30,530 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:30,584 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:30,639 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:30,692 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:30,750 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:30,805 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:30,863 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:30,954 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:30,954 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-31 17:09:30,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:30,991 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:09:30,991 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:31,094 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:31,095 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-31 17:09:31,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,136 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:09:31,137 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-31 17:09:31,138 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:31,228 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:31,228 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-31 17:09:31,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:31,288 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 169 [2019-01-31 17:09:31,289 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:31,379 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:31,379 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:89 [2019-01-31 17:09:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:31,407 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:09:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:31,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:09:31,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-31 17:09:31,462 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:09:31,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-31 17:09:31,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-31 17:09:31,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-01-31 17:09:31,463 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 10 states. [2019-01-31 17:09:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:09:32,544 INFO L93 Difference]: Finished difference Result 212 states and 968 transitions. [2019-01-31 17:09:32,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-31 17:09:32,544 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-31 17:09:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:09:32,547 INFO L225 Difference]: With dead ends: 212 [2019-01-31 17:09:32,547 INFO L226 Difference]: Without dead ends: 205 [2019-01-31 17:09:32,548 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-31 17:09:32,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-01-31 17:09:32,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2019-01-31 17:09:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-01-31 17:09:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 789 transitions. [2019-01-31 17:09:32,581 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 789 transitions. Word has length 5 [2019-01-31 17:09:32,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:09:32,581 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 789 transitions. [2019-01-31 17:09:32,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-31 17:09:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 789 transitions. [2019-01-31 17:09:32,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-31 17:09:32,582 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:09:32,583 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-31 17:09:32,583 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:09:32,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:32,583 INFO L82 PathProgramCache]: Analyzing trace with hash 29600106, now seen corresponding path program 1 times [2019-01-31 17:09:32,583 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:09:32,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:32,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:32,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:32,584 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:09:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:32,983 WARN L181 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-01-31 17:09:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:33,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:33,014 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:09:33,014 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-31 17:09:33,014 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [35] [2019-01-31 17:09:33,015 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:09:33,015 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:09:33,017 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:09:33,017 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-31 17:09:33,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:33,018 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:09:33,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:33,018 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:09:33,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:33,029 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:09:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:33,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:09:33,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-31 17:09:33,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-31 17:09:33,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,190 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-31 17:09:33,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-31 17:09:33,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:09:33,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:09:33,618 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:09:33,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:33,641 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:09:33,641 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:33,705 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:33,774 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:33,845 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:33,914 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:33,987 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:34,057 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:34,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:09:34,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:09:34,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:09:34,151 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:09:34,155 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:09:34,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:09:34,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:09:34,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:09:34,165 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:34,234 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:34,274 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:34,305 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:34,330 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:34,354 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:34,369 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:34,385 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:34,476 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:34,476 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-31 17:09:34,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,569 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:09:34,569 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:34,659 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:34,659 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-31 17:09:34,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,706 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:09:34,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-31 17:09:34,708 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:34,799 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:34,799 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-31 17:09:34,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:34,844 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:09:34,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-31 17:09:34,846 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:34,936 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:34,937 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-31 17:09:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:34,969 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:09:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:35,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:09:35,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-31 17:09:35,032 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:09:35,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-31 17:09:35,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-31 17:09:35,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-31 17:09:35,032 INFO L87 Difference]: Start difference. First operand 122 states and 789 transitions. Second operand 10 states. [2019-01-31 17:09:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:09:36,638 INFO L93 Difference]: Finished difference Result 169 states and 850 transitions. [2019-01-31 17:09:36,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-31 17:09:36,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-31 17:09:36,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:09:36,640 INFO L225 Difference]: With dead ends: 169 [2019-01-31 17:09:36,641 INFO L226 Difference]: Without dead ends: 168 [2019-01-31 17:09:36,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-31 17:09:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-01-31 17:09:36,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2019-01-31 17:09:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-01-31 17:09:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 762 transitions. [2019-01-31 17:09:36,675 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 762 transitions. Word has length 5 [2019-01-31 17:09:36,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:09:36,676 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 762 transitions. [2019-01-31 17:09:36,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-31 17:09:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 762 transitions. [2019-01-31 17:09:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-31 17:09:36,676 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:09:36,677 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-31 17:09:36,677 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:09:36,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:36,677 INFO L82 PathProgramCache]: Analyzing trace with hash 29600602, now seen corresponding path program 1 times [2019-01-31 17:09:36,677 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:09:36,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:36,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:36,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:36,678 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:09:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:37,158 WARN L181 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2019-01-31 17:09:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:37,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:37,195 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:09:37,195 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-31 17:09:37,195 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [35] [2019-01-31 17:09:37,199 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:09:37,199 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:09:37,201 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:09:37,201 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-31 17:09:37,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:37,202 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:09:37,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:37,202 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:09:37,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:37,222 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:09:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:37,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:09:37,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-31 17:09:37,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-31 17:09:37,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,384 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-31 17:09:37,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-31 17:09:37,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-31 17:09:37,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-31 17:09:37,772 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-31 17:09:37,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:37,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-31 17:09:37,790 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:37,847 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:37,904 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:37,963 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:38,027 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:38,086 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:38,145 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:38,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:09:38,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:09:38,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:09:38,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:09:38,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:09:38,233 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:09:38,236 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:09:38,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-31 17:09:38,242 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:38,312 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:38,352 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:38,384 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:38,408 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:38,428 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:38,445 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:38,461 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:38,553 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:38,553 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-31 17:09:38,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-31 17:09:38,592 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:38,688 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:38,688 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-31 17:09:38,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,783 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:09:38,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-31 17:09:38,785 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:38,876 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:38,877 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-31 17:09:38,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:38,948 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:09:38,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-31 17:09:38,950 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:39,038 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:39,038 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-31 17:09:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:39,273 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:09:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:39,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:09:39,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-31 17:09:39,329 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:09:39,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-31 17:09:39,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-31 17:09:39,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-31 17:09:39,329 INFO L87 Difference]: Start difference. First operand 119 states and 762 transitions. Second operand 10 states. [2019-01-31 17:09:40,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:09:40,862 INFO L93 Difference]: Finished difference Result 176 states and 845 transitions. [2019-01-31 17:09:40,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-31 17:09:40,863 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-31 17:09:40,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:09:40,865 INFO L225 Difference]: With dead ends: 176 [2019-01-31 17:09:40,865 INFO L226 Difference]: Without dead ends: 172 [2019-01-31 17:09:40,866 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-31 17:09:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-01-31 17:09:40,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-01-31 17:09:40,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-01-31 17:09:40,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 788 transitions. [2019-01-31 17:09:40,894 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 788 transitions. Word has length 5 [2019-01-31 17:09:40,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:09:40,894 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 788 transitions. [2019-01-31 17:09:40,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-31 17:09:40,895 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 788 transitions. [2019-01-31 17:09:40,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-31 17:09:40,895 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:09:40,895 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-31 17:09:40,895 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:09:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:40,896 INFO L82 PathProgramCache]: Analyzing trace with hash 29588822, now seen corresponding path program 1 times [2019-01-31 17:09:40,896 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:09:40,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:40,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:40,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:09:40,896 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:09:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:41,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:41,050 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:09:41,051 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-31 17:09:41,051 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [35] [2019-01-31 17:09:41,054 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:09:41,054 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:09:41,055 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:09:41,055 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 3 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-31 17:09:41,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:09:41,056 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:09:41,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:09:41,056 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:09:41,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:09:41,069 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:09:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:09:41,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:09:41,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:09:41,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,146 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:09:41,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,199 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:09:41,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:09:41,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:09:41,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:41,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:09:41,441 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:41,480 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:41,520 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:41,560 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:41,599 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:41,640 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:41,689 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:09:41,710 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:09:41,725 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:09:41,741 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:09:41,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:09:41,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:09:41,749 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:09:41,758 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:09:41,758 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:41,810 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:41,850 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:41,881 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:41,906 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:41,926 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:41,941 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:41,957 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:09:42,029 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:09:42,029 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:09:42,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:42,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-31 17:09:42,137 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-31 17:09:42,173 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-31 17:09:43,552 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-31 17:09:43,553 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:958 [2019-01-31 17:09:57,486 WARN L181 SmtUtils]: Spent 13.60 s on a formula simplification. DAG size of input: 482 DAG size of output: 187 [2019-01-31 17:09:57,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,500 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 124 treesize of output 158 [2019-01-31 17:09:57,501 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:57,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,761 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:09:57,762 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 108 treesize of output 154 [2019-01-31 17:09:57,763 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:57,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:57,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 178 [2019-01-31 17:09:57,974 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:58,185 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-01-31 17:09:58,185 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:381, output treesize:277 [2019-01-31 17:09:58,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 136 [2019-01-31 17:09:58,332 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:58,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 164 [2019-01-31 17:09:58,530 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:58,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:09:58,732 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:09:58,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 173 [2019-01-31 17:09:58,734 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-31 17:09:58,911 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-31 17:09:58,911 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:239 [2019-01-31 17:09:59,182 WARN L181 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-01-31 17:09:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:59,185 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:09:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:09:59,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:09:59,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-01-31 17:09:59,226 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:09:59,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-31 17:09:59,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-31 17:09:59,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-01-31 17:09:59,226 INFO L87 Difference]: Start difference. First operand 125 states and 788 transitions. Second operand 10 states. [2019-01-31 17:09:59,605 WARN L181 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 131 [2019-01-31 17:10:58,922 WARN L181 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 147 [2019-01-31 17:11:00,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-31 17:11:00,600 INFO L93 Difference]: Finished difference Result 235 states and 1248 transitions. [2019-01-31 17:11:00,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-31 17:11:00,600 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-31 17:11:00,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-31 17:11:00,603 INFO L225 Difference]: With dead ends: 235 [2019-01-31 17:11:00,603 INFO L226 Difference]: Without dead ends: 230 [2019-01-31 17:11:00,604 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-01-31 17:11:00,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-01-31 17:11:00,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 145. [2019-01-31 17:11:00,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-01-31 17:11:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 973 transitions. [2019-01-31 17:11:00,641 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 973 transitions. Word has length 5 [2019-01-31 17:11:00,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-31 17:11:00,642 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 973 transitions. [2019-01-31 17:11:00,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-31 17:11:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 973 transitions. [2019-01-31 17:11:00,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-31 17:11:00,643 INFO L394 BasicCegarLoop]: Found error trace [2019-01-31 17:11:00,643 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-31 17:11:00,643 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT]=== [2019-01-31 17:11:00,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:11:00,643 INFO L82 PathProgramCache]: Analyzing trace with hash 29589382, now seen corresponding path program 1 times [2019-01-31 17:11:00,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-31 17:11:00,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:11:00,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:11:00,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-31 17:11:00,644 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-31 17:11:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:11:01,155 WARN L181 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2019-01-31 17:11:01,306 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-01-31 17:11:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:11:01,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:11:01,526 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-31 17:11:01,526 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-31 17:11:01,526 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [36], [37] [2019-01-31 17:11:01,531 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-31 17:11:01,531 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 17:11:01,533 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 17:11:01,533 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 2. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-31 17:11:01,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-31 17:11:01,533 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-31 17:11:01,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-31 17:11:01,534 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-31 17:11:01,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-31 17:11:01,544 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-31 17:11:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-31 17:11:01,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-31 17:11:01,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-31 17:11:01,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,626 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-31 17:11:01,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-31 17:11:01,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-31 17:11:01,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-31 17:11:01,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:01,917 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-31 17:11:01,918 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-31 17:11:01,958 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:11:01,998 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:11:02,044 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:11:02,085 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:11:02,126 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:11:02,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-31 17:11:02,181 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-31 17:11:02,183 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-31 17:11:02,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-31 17:11:02,189 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-31 17:11:02,192 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-31 17:11:02,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-31 17:11:02,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-31 17:11:02,209 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-31 17:11:02,260 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:11:02,300 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:11:02,331 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:11:02,356 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:11:02,375 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:11:02,392 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:11:02,408 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-31 17:11:02,476 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-31 17:11:02,476 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-31 17:11:02,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:02,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-31 17:11:02,573 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-31 17:11:02,603 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-31 17:11:03,985 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-31 17:11:03,986 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:956 [2019-01-31 17:11:04,979 WARN L181 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 189 [2019-01-31 17:11:04,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:04,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:04,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:04,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 194 [2019-01-31 17:11:04,991 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-31 17:11:05,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:05,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:05,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:05,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:05,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:05,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:05,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:05,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:05,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:05,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 166 [2019-01-31 17:11:05,267 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-31 17:11:05,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:05,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:05,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:05,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:05,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:05,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:05,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-31 17:11:05,475 INFO L683 Elim1Store]: detected equality via solver [2019-01-31 17:11:05,476 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 108 treesize of output 166 [2019-01-31 17:11:05,477 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-31 17:11:05,658 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-31 17:11:05,659 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:385, output treesize:277 [2019-01-31 17:11:09,529 WARN L181 SmtUtils]: Spent 2.62 s on a formula simplification that was a NOOP. DAG size: 158 [2019-01-31 17:11:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:11:09,537 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-31 17:11:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-31 17:11:09,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-31 17:11:09,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-31 17:11:09,595 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-31 17:11:09,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-31 17:11:09,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-31 17:11:09,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-31 17:11:09,596 INFO L87 Difference]: Start difference. First operand 145 states and 973 transitions. Second operand 8 states. [2019-01-31 17:11:29,933 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000) stderr output: (error "out of memory") [2019-01-31 17:11:29,934 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:8092 -smt2 -in -t:10000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:652) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:256) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:715) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2019-01-31 17:11:29,938 INFO L168 Benchmark]: Toolchain (without parser) took 243443.94 ms. Allocated memory was 134.7 MB in the beginning and 224.4 MB in the end (delta: 89.7 MB). Free memory was 109.9 MB in the beginning and 137.2 MB in the end (delta: -27.2 MB). Peak memory consumption was 62.4 MB. Max. memory is 7.1 GB. [2019-01-31 17:11:29,939 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 134.7 MB. Free memory is still 111.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-31 17:11:29,939 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.51 ms. Allocated memory is still 134.7 MB. Free memory was 109.7 MB in the beginning and 107.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-01-31 17:11:29,939 INFO L168 Benchmark]: Boogie Preprocessor took 41.56 ms. Allocated memory is still 134.7 MB. Free memory was 107.4 MB in the beginning and 106.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-31 17:11:29,939 INFO L168 Benchmark]: RCFGBuilder took 441.87 ms. Allocated memory is still 134.7 MB. Free memory was 106.1 MB in the beginning and 93.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2019-01-31 17:11:29,940 INFO L168 Benchmark]: TraceAbstraction took 242885.59 ms. Allocated memory was 134.7 MB in the beginning and 224.4 MB in the end (delta: 89.7 MB). Free memory was 92.8 MB in the beginning and 137.2 MB in the end (delta: -44.4 MB). Peak memory consumption was 45.2 MB. Max. memory is 7.1 GB. [2019-01-31 17:11:29,942 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 0.25 ms. Allocated memory is still 134.7 MB. Free memory is still 111.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 70.51 ms. Allocated memory is still 134.7 MB. Free memory was 109.7 MB in the beginning and 107.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.56 ms. Allocated memory is still 134.7 MB. Free memory was 107.4 MB in the beginning and 106.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 441.87 ms. Allocated memory is still 134.7 MB. Free memory was 106.1 MB in the beginning and 93.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 242885.59 ms. Allocated memory was 134.7 MB in the beginning and 224.4 MB in the end (delta: 89.7 MB). Free memory was 92.8 MB in the beginning and 137.2 MB in the end (delta: -44.4 MB). Peak memory consumption was 45.2 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:8092 -smt2 -in -t:10000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...