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-10-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f57a05f [2019-01-08 13:59:21,216 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-08 13:59:21,219 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-08 13:59:21,236 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-01-08 13:59:21,292 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 [2019-01-08 13:59:21,310 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-08 13:59:21,313 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-08 13:59:21,313 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-08 13:59:21,314 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-08 13:59:21,314 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-08 13:59:21,314 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-08 13:59:21,314 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-08 13:59:21,314 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-08 13:59:21,315 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-08 13:59:21,315 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-08 13:59:21,315 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-08 13:59:21,315 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-08 13:59:21,315 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-08 13:59:21,315 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-08 13:59:21,319 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-08 13:59:21,320 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-08 13:59:21,320 INFO L133 SettingsManager]: * Use SBE=true [2019-01-08 13:59:21,320 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-08 13:59:21,320 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-08 13:59:21,322 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-08 13:59:21,323 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-08 13:59:21,323 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-08 13:59:21,323 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-08 13:59:21,323 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-08 13:59:21,323 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-08 13:59:21,323 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-08 13:59:21,324 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-08 13:59:21,324 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-08 13:59:21,324 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-08 13:59:21,324 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-08 13:59:21,324 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-08 13:59:21,325 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-08 13:59:21,325 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-08 13:59:21,325 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-08 13:59:21,325 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-08 13:59:21,325 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-08 13:59:21,325 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-08 13:59:21,326 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-08 13:59:21,326 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-08 13:59:21,326 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-08 13:59:21,380 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-08 13:59:21,393 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-08 13:59:21,397 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-08 13:59:21,398 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-08 13:59:21,399 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-08 13:59:21,400 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-10-unlimited.bpl [2019-01-08 13:59:21,400 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-10-unlimited.bpl' [2019-01-08 13:59:21,444 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-08 13:59:21,446 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-08 13:59:21,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-08 13:59:21,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-08 13:59:21,447 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-08 13:59:21,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:59:21" (1/1) ... [2019-01-08 13:59:21,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:59:21" (1/1) ... [2019-01-08 13:59:21,509 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-08 13:59:21,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-08 13:59:21,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-08 13:59:21,510 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-08 13:59:21,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:59:21" (1/1) ... [2019-01-08 13:59:21,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:59:21" (1/1) ... [2019-01-08 13:59:21,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:59:21" (1/1) ... [2019-01-08 13:59:21,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:59:21" (1/1) ... [2019-01-08 13:59:21,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:59:21" (1/1) ... [2019-01-08 13:59:21,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:59:21" (1/1) ... [2019-01-08 13:59:21,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:59:21" (1/1) ... [2019-01-08 13:59:21,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-08 13:59:21,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-08 13:59:21,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-08 13:59:21,541 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-08 13:59:21,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:59:21" (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:8192 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-08 13:59:21,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-08 13:59:21,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-08 13:59:22,170 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-08 13:59:22,170 INFO L286 CfgBuilder]: Removed 23 assue(true) statements. [2019-01-08 13:59:22,171 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 01:59:22 BoogieIcfgContainer [2019-01-08 13:59:22,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-08 13:59:22,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-08 13:59:22,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-08 13:59:22,176 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-08 13:59:22,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 01:59:21" (1/2) ... [2019-01-08 13:59:22,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eca57de and model type speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 01:59:22, skipping insertion in model container [2019-01-08 13:59:22,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-10-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 01:59:22" (2/2) ... [2019-01-08 13:59:22,180 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-10-unlimited.bpl [2019-01-08 13:59:22,190 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-08 13:59:22,199 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2019-01-08 13:59:22,218 INFO L257 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2019-01-08 13:59:22,253 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-08 13:59:22,253 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-08 13:59:22,253 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-08 13:59:22,253 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-08 13:59:22,253 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-08 13:59:22,254 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-08 13:59:22,254 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-08 13:59:22,254 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-08 13:59:22,271 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-01-08 13:59:22,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-08 13:59:22,277 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:59:22,278 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-08 13:59:22,283 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr9ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:59:22,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:59:22,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1004, now seen corresponding path program 1 times [2019-01-08 13:59:22,295 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:59:22,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:59:22,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:59:22,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:59:22,349 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:59:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:59:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:22,552 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 13:59:22,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-08 13:59:22,552 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 13:59:22,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-08 13:59:22,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-08 13:59:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 13:59:22,571 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-01-08 13:59:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 13:59:22,830 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2019-01-08 13:59:22,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 13:59:22,832 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-08 13:59:22,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 13:59:22,849 INFO L225 Difference]: With dead ends: 45 [2019-01-08 13:59:22,849 INFO L226 Difference]: Without dead ends: 40 [2019-01-08 13:59:22,853 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 [2019-01-08 13:59:22,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-01-08 13:59:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 22. [2019-01-08 13:59:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-01-08 13:59:22,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 41 transitions. [2019-01-08 13:59:22,895 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 41 transitions. Word has length 2 [2019-01-08 13:59:22,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 13:59:22,897 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 41 transitions. [2019-01-08 13:59:22,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-08 13:59:22,897 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 41 transitions. [2019-01-08 13:59:22,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 13:59:22,898 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 13:59:22,898 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 13:59:22,899 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr9ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-08 13:59:22,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:59:22,900 INFO L82 PathProgramCache]: Analyzing trace with hash 30392, now seen corresponding path program 1 times [2019-01-08 13:59:22,900 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 13:59:22,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:59:22,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:59:22,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 13:59:22,901 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 13:59:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:59:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:23,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:59:23,185 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 13:59:23,187 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 13:59:23,192 INFO L207 CegarAbsIntRunner]: [0], [18], [43] [2019-01-08 13:59:23,236 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 13:59:23,236 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 13:59:23,327 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 13:59:23,328 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 104 root evaluator evaluations with a maximum evaluation depth of 2. Performed 104 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 13:59:23,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 13:59:23,335 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 13:59:23,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 13:59:23,335 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 [2019-01-08 13:59:23,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 13:59:23,352 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 13:59:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 13:59:23,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 13:59:23,727 WARN L181 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-01-08 13:59:23,750 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 33 treesize of output 36 [2019-01-08 13:59:23,776 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 36 treesize of output 42 [2019-01-08 13:59:23,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:23,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:23,825 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 38 treesize of output 52 [2019-01-08 13:59:23,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:23,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:23,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:23,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 66 [2019-01-08 13:59:23,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:23,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:23,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:23,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:23,913 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 84 [2019-01-08 13:59:23,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:23,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,064 INFO L303 Elim1Store]: Index analysis took 145 ms [2019-01-08 13:59:24,066 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 44 treesize of output 106 [2019-01-08 13:59:24,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,219 INFO L303 Elim1Store]: Index analysis took 141 ms [2019-01-08 13:59:24,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 132 [2019-01-08 13:59:24,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,352 INFO L303 Elim1Store]: Index analysis took 124 ms [2019-01-08 13:59:24,355 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 162 [2019-01-08 13:59:24,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:24,416 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 196 [2019-01-08 13:59:24,539 INFO L303 Elim1Store]: Index analysis took 107 ms [2019-01-08 13:59:24,543 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 195 [2019-01-08 13:59:24,547 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 13:59:25,220 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:25,462 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:25,622 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:25,734 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:25,780 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:25,820 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:25,852 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:25,909 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:25,939 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:26,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,029 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 146 treesize of output 140 [2019-01-08 13:59:26,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,128 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 127 treesize of output 127 [2019-01-08 13:59:26,298 WARN L181 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2019-01-08 13:59:26,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,396 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 106 treesize of output 123 [2019-01-08 13:59:26,537 WARN L181 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2019-01-08 13:59:26,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,566 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 88 treesize of output 122 [2019-01-08 13:59:26,864 WARN L181 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-01-08 13:59:26,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:26,900 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 73 treesize of output 130 [2019-01-08 13:59:27,073 WARN L181 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2019-01-08 13:59:27,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,117 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 61 treesize of output 145 [2019-01-08 13:59:27,298 WARN L181 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2019-01-08 13:59:27,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,338 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 167 [2019-01-08 13:59:27,556 WARN L181 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2019-01-08 13:59:27,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:27,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 37 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 145 [2019-01-08 13:59:27,642 INFO L267 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2019-01-08 13:59:27,732 INFO L267 ElimStorePlain]: Start of recursive call 18: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:27,828 INFO L267 ElimStorePlain]: Start of recursive call 17: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:27,924 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:28,021 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:28,120 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:28,224 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:28,325 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 13:59:28,483 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-01-08 13:59:28,483 INFO L202 ElimStorePlain]: Needed 19 recursive calls to eliminate 10 variables, input treesize:182, output treesize:195 [2019-01-08 13:59:28,669 WARN L181 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 104 [2019-01-08 13:59:28,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 13:59:28,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 37 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 190 [2019-01-08 13:59:28,738 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 13:59:29,020 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-01-08 13:59:29,021 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:200, output treesize:158 [2019-01-08 13:59:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:29,065 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 13:59:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 13:59:29,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 13:59:29,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 13:59:29,100 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 13:59:29,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 13:59:29,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 13:59:29,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 13:59:29,102 INFO L87 Difference]: Start difference. First operand 22 states and 41 transitions. Second operand 6 states. [2019-01-08 14:00:20,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:00:20,115 INFO L93 Difference]: Finished difference Result 79 states and 116 transitions. [2019-01-08 14:00:20,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:00:20,116 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:00:20,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:00:20,119 INFO L225 Difference]: With dead ends: 79 [2019-01-08 14:00:20,119 INFO L226 Difference]: Without dead ends: 77 [2019-01-08 14:00:20,121 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:00:20,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-01-08 14:00:20,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 26. [2019-01-08 14:00:20,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-08 14:00:20,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 57 transitions. [2019-01-08 14:00:20,129 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 57 transitions. Word has length 3 [2019-01-08 14:00:20,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:00:20,129 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 57 transitions. [2019-01-08 14:00:20,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:00:20,130 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 57 transitions. [2019-01-08 14:00:20,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:00:20,130 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:00:20,130 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:00:20,131 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr9ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:00:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:00:20,131 INFO L82 PathProgramCache]: Analyzing trace with hash 30888, now seen corresponding path program 1 times [2019-01-08 14:00:20,131 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:00:20,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:00:20,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:00:20,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:00:20,133 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:00:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:00:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:20,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:00:20,229 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:00:20,229 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:00:20,230 INFO L207 CegarAbsIntRunner]: [0], [34], [43] [2019-01-08 14:00:20,231 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:00:20,231 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:00:20,241 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:00:20,242 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 104 root evaluator evaluations with a maximum evaluation depth of 2. Performed 104 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:00:20,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:00:20,242 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:00:20,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:00:20,242 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 [2019-01-08 14:00:20,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:00:20,251 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:00:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:00:20,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:00:20,330 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 33 treesize of output 36 [2019-01-08 14:00:20,353 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 42 [2019-01-08 14:00:20,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,365 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 38 treesize of output 52 [2019-01-08 14:00:20,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,387 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 66 [2019-01-08 14:00:20,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,416 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 42 treesize of output 84 [2019-01-08 14:00:20,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,480 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 44 treesize of output 106 [2019-01-08 14:00:20,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,515 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 46 treesize of output 132 [2019-01-08 14:00:20,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,656 INFO L303 Elim1Store]: Index analysis took 137 ms [2019-01-08 14:00:20,658 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 162 [2019-01-08 14:00:20,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:20,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 196 [2019-01-08 14:00:20,788 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 195 [2019-01-08 14:00:20,790 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:00:20,920 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:21,039 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:21,127 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:21,180 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:21,274 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:21,312 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:21,342 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:21,370 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:21,394 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:21,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:21,490 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 146 treesize of output 140 [2019-01-08 14:00:21,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:21,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:21,568 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 127 treesize of output 127 [2019-01-08 14:00:21,901 WARN L181 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2019-01-08 14:00:21,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:21,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:21,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:21,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:21,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 123 [2019-01-08 14:00:21,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:21,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:21,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:21,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:21,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:21,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:21,991 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 122 [2019-01-08 14:00:22,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,097 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 73 treesize of output 130 [2019-01-08 14:00:22,209 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2019-01-08 14:00:22,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,263 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 61 treesize of output 145 [2019-01-08 14:00:22,407 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2019-01-08 14:00:22,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,427 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 167 [2019-01-08 14:00:22,653 WARN L181 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2019-01-08 14:00:22,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:22,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 37 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 145 [2019-01-08 14:00:22,683 INFO L267 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2019-01-08 14:00:22,766 INFO L267 ElimStorePlain]: Start of recursive call 18: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:22,847 INFO L267 ElimStorePlain]: Start of recursive call 17: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:23,019 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:23,104 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:23,192 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:23,280 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:23,368 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:00:23,510 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-01-08 14:00:23,510 INFO L202 ElimStorePlain]: Needed 19 recursive calls to eliminate 10 variables, input treesize:182, output treesize:195 [2019-01-08 14:00:23,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:00:23,630 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 37 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 196 [2019-01-08 14:00:23,631 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:00:23,786 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-01-08 14:00:23,787 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:200, output treesize:158 [2019-01-08 14:00:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:23,948 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:00:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:00:23,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:00:23,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:00:23,981 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:00:23,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:00:23,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:00:23,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:00:23,982 INFO L87 Difference]: Start difference. First operand 26 states and 57 transitions. Second operand 6 states. [2019-01-08 14:01:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:01:11,895 INFO L93 Difference]: Finished difference Result 79 states and 126 transitions. [2019-01-08 14:01:11,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:01:11,896 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:01:11,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:01:11,897 INFO L225 Difference]: With dead ends: 79 [2019-01-08 14:01:11,897 INFO L226 Difference]: Without dead ends: 77 [2019-01-08 14:01:11,898 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:01:11,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-01-08 14:01:11,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 31. [2019-01-08 14:01:11,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-08 14:01:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 75 transitions. [2019-01-08 14:01:11,911 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 75 transitions. Word has length 3 [2019-01-08 14:01:11,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:01:11,911 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 75 transitions. [2019-01-08 14:01:11,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:01:11,911 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 75 transitions. [2019-01-08 14:01:11,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:01:11,913 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:01:11,914 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:01:11,914 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr9ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:01:11,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:01:11,914 INFO L82 PathProgramCache]: Analyzing trace with hash 30020, now seen corresponding path program 1 times [2019-01-08 14:01:11,915 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:01:11,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:01:11,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:01:11,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:01:11,916 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:01:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:01:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:12,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:01:12,067 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:01:12,068 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:01:12,068 INFO L207 CegarAbsIntRunner]: [0], [6], [43] [2019-01-08 14:01:12,069 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:01:12,069 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:01:12,078 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:01:12,078 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 104 root evaluator evaluations with a maximum evaluation depth of 2. Performed 104 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:01:12,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:01:12,079 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:01:12,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:01:12,079 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 [2019-01-08 14:01:12,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:01:12,093 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:01:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:01:12,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:01:12,157 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 33 treesize of output 36 [2019-01-08 14:01:12,169 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 36 treesize of output 42 [2019-01-08 14:01:12,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,176 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 38 treesize of output 52 [2019-01-08 14:01:12,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,186 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 66 [2019-01-08 14:01:12,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,201 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 42 treesize of output 84 [2019-01-08 14:01:12,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,221 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 44 treesize of output 106 [2019-01-08 14:01:12,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 132 [2019-01-08 14:01:12,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,283 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 162 [2019-01-08 14:01:12,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:12,384 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 196 [2019-01-08 14:01:12,522 INFO L303 Elim1Store]: Index analysis took 132 ms [2019-01-08 14:01:12,524 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 195 [2019-01-08 14:01:12,526 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-01-08 14:01:12,651 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:12,760 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:12,842 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:12,909 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:12,958 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:12,998 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:13,032 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:13,071 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:13,098 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:13,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,167 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 146 treesize of output 140 [2019-01-08 14:01:13,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,245 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 127 treesize of output 127 [2019-01-08 14:01:13,405 WARN L181 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2019-01-08 14:01:13,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,417 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 106 treesize of output 123 [2019-01-08 14:01:13,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,514 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 88 treesize of output 122 [2019-01-08 14:01:13,617 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-01-08 14:01:13,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,632 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 73 treesize of output 130 [2019-01-08 14:01:13,744 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2019-01-08 14:01:13,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,765 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 61 treesize of output 145 [2019-01-08 14:01:13,905 WARN L181 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2019-01-08 14:01:13,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:13,989 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 167 [2019-01-08 14:01:14,176 WARN L181 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2019-01-08 14:01:14,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:14,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:14,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:14,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:14,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:14,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:14,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:14,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:14,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:14,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:14,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:14,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:14,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:14,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:14,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 37 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 145 [2019-01-08 14:01:14,199 INFO L267 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2019-01-08 14:01:14,278 INFO L267 ElimStorePlain]: Start of recursive call 18: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:14,358 INFO L267 ElimStorePlain]: Start of recursive call 17: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:14,439 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:14,523 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:14,617 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:14,703 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:14,791 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:14,975 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 1 xjuncts. [2019-01-08 14:01:14,976 INFO L202 ElimStorePlain]: Needed 19 recursive calls to eliminate 11 variables, input treesize:182, output treesize:195 [2019-01-08 14:01:15,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:15,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 37 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 196 [2019-01-08 14:01:15,063 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:01:15,256 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-01-08 14:01:15,256 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:200, output treesize:158 [2019-01-08 14:01:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:15,274 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:01:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:15,296 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-08 14:01:15,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-08 14:01:15,296 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:01:15,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-08 14:01:15,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-08 14:01:15,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-08 14:01:15,297 INFO L87 Difference]: Start difference. First operand 31 states and 75 transitions. Second operand 4 states. [2019-01-08 14:01:15,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:01:15,397 INFO L93 Difference]: Finished difference Result 37 states and 121 transitions. [2019-01-08 14:01:15,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-08 14:01:15,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-08 14:01:15,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:01:15,399 INFO L225 Difference]: With dead ends: 37 [2019-01-08 14:01:15,399 INFO L226 Difference]: Without dead ends: 36 [2019-01-08 14:01:15,400 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-08 14:01:15,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-08 14:01:15,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-01-08 14:01:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-01-08 14:01:15,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 120 transitions. [2019-01-08 14:01:15,408 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 120 transitions. Word has length 3 [2019-01-08 14:01:15,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:01:15,408 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 120 transitions. [2019-01-08 14:01:15,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-08 14:01:15,409 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 120 transitions. [2019-01-08 14:01:15,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:01:15,409 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:01:15,409 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:01:15,410 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr9ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:01:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:01:15,410 INFO L82 PathProgramCache]: Analyzing trace with hash 31074, now seen corresponding path program 1 times [2019-01-08 14:01:15,410 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:01:15,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:01:15,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:01:15,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:01:15,411 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:01:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:01:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:15,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:01:15,588 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:01:15,588 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:01:15,589 INFO L207 CegarAbsIntRunner]: [0], [40], [43] [2019-01-08 14:01:15,590 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:01:15,590 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:01:15,598 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:01:15,598 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 104 root evaluator evaluations with a maximum evaluation depth of 2. Performed 104 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:01:15,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:01:15,599 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:01:15,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:01:15,599 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 [2019-01-08 14:01:15,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:01:15,615 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:01:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:01:15,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:01:15,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:15,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 169 [2019-01-08 14:01:15,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:15,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:15,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 153 [2019-01-08 14:01:15,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:15,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:15,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:15,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:15,839 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 132 treesize of output 146 [2019-01-08 14:01:15,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:15,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:15,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:15,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:15,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:15,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:15,935 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 142 [2019-01-08 14:01:16,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,048 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 93 treesize of output 147 [2019-01-08 14:01:16,180 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2019-01-08 14:01:16,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,213 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 78 treesize of output 159 [2019-01-08 14:01:16,404 WARN L181 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2019-01-08 14:01:16,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,441 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 178 [2019-01-08 14:01:16,649 WARN L181 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2019-01-08 14:01:16,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,671 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 37 disjoint index pairs (out of 36 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 204 [2019-01-08 14:01:16,913 WARN L181 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2019-01-08 14:01:16,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:16,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 46 disjoint index pairs (out of 45 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 181 [2019-01-08 14:01:16,941 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-08 14:01:17,049 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:17,164 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:17,286 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:17,411 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:17,537 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:17,668 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:17,929 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:18,078 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:18,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 36 [2019-01-08 14:01:18,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 17 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 42 [2019-01-08 14:01:18,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 52 [2019-01-08 14:01:18,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 30 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 66 [2019-01-08 14:01:18,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 35 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 84 [2019-01-08 14:01:18,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 39 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 106 [2019-01-08 14:01:18,305 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 42 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 132 [2019-01-08 14:01:18,332 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 44 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 162 [2019-01-08 14:01:18,348 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 45 disjoint index pairs (out of 28 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 196 [2019-01-08 14:01:18,355 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 231 [2019-01-08 14:01:18,357 INFO L267 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2019-01-08 14:01:18,521 INFO L267 ElimStorePlain]: Start of recursive call 19: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:18,605 INFO L267 ElimStorePlain]: Start of recursive call 18: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:18,668 INFO L267 ElimStorePlain]: Start of recursive call 17: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:18,721 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:18,761 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:18,790 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:18,820 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:18,843 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:18,866 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:01:19,046 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-01-08 14:01:19,046 INFO L202 ElimStorePlain]: Needed 20 recursive calls to eliminate 10 variables, input treesize:214, output treesize:231 [2019-01-08 14:01:19,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:01:19,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 46 disjoint index pairs (out of 45 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 237 [2019-01-08 14:01:19,140 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:01:19,501 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 1 xjuncts. [2019-01-08 14:01:19,502 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:241, output treesize:195 [2019-01-08 14:01:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:19,526 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:01:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:01:19,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:01:19,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:01:19,559 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:01:19,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:01:19,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:01:19,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:01:19,560 INFO L87 Difference]: Start difference. First operand 35 states and 120 transitions. Second operand 6 states. [2019-01-08 14:01:35,809 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:8192 -smt2 -in -t:2000) 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 [2019-01-08 14:01:35,813 INFO L168 Benchmark]: Toolchain (without parser) took 134368.86 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 1.0 GB). Free memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: -810.2 MB). Peak memory consumption was 212.7 MB. Max. memory is 7.1 GB. [2019-01-08 14:01:35,814 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:01:35,815 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.13 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:01:35,815 INFO L168 Benchmark]: Boogie Preprocessor took 29.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:01:35,815 INFO L168 Benchmark]: RCFGBuilder took 631.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2019-01-08 14:01:35,816 INFO L168 Benchmark]: TraceAbstraction took 133639.77 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 1.0 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -831.4 MB). Peak memory consumption was 191.5 MB. Max. memory is 7.1 GB. [2019-01-08 14:01:35,818 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 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 63.13 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 631.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 133639.77 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 1.0 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -831.4 MB). Peak memory consumption was 191.5 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:8192 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000) 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...